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{{Short description|Binary star system in the constellation Aquila}} |
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{{Starbox begin | |
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{{Starbox begin}} |
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name=φ Aquilae }} |
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{{Starbox |
{{Starbox image |
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| image = |
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epoch=J2000 | |
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{{Location mark |
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ra=19<sup>h</sup> 56<sup>m</sup> 14.2519<sup>s</sup> | |
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| image=Aquila IAU.svg |
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dec= +11° 25′ 25.395″ | |
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| float=center | width=240 | position=right |
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appmag_v=5.29 | |
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| mark=Red circle.svg | mark_width=10 | mark_link=φ Aql |
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constell=[[Aquila (constellation)|Aquila]] }} |
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| x%=43.0 | y%=27.8 |
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{{Starbox character | |
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}} |
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class=A1 IV | |
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| caption = Location of φ Aquilae (circled) |
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r-i = | |
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}} |
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v-r = | |
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{{Starbox observe |
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b-v =-0.08 | |
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| epoch = J2000 |
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u-b =-0.01 | |
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| ra = {{RA|19|56|14.25183}}<ref name=GaiaDR2/> |
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variable= }} |
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| dec = {{DEC|+11|25|25.3931}}<ref name=GaiaDR2/> |
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{{Starbox astrometry | |
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| appmag_v = +5.28<ref name=aaass52_131/> |
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radial_v=-27.2 | |
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| constell = [[Aquila (constellation)|Aquila]] |
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prop_mo_ra=32.4 | |
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}} |
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prop_mo_dec= 4.57 | |
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{{Starbox character |
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parallax=15.84 | |
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| class = A1 IV<ref name=aj74_375/> |
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p_error=0.76 | |
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| b-v = +0.00<ref name=aaass52_131/> |
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absmag_v=5.299 }} |
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| u-b = –0.02<ref name=aaass52_131/> |
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{{Starbox detail| |
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| r-i = |
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mass=3.1 | |
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| v-r = |
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radius=2.1 | |
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| variable = |
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luminosity=40 | |
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}} |
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temperature=7,500–10,000 | |
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{{Starbox astrometry |
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metal= | |
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| radial_v = –27.2<ref name=gcrv1953/> |
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rotation=26 Km/s | |
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| prop_mo_ra = +32.826<ref name=GaiaDR2/> |
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age= }} |
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| prop_mo_dec = +6.162<ref name=GaiaDR2/> |
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{{Starbox catalog | |
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| parallax = 14.1980 |
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names=phi Aql, 61 Aquilae, [[Henry Draper Catalogue|HD]] 188728, [[Durchmusterung|BD]]+11° 4055, [[Hipparcos Catalogue|HIP]] 98103, [[Smithsonian Astrophysical Observatory Star Catalog|SAO]] 105438, [[FK5]] 3590, [[Bright Star Catalogue|HR]] 7610. }} |
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| p_error = 0.1579 |
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{{Starbox reference | |
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| parallax_error = <ref name=GaiaDR2/> |
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Simbad=HD+188728 |
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| absmag_v = +1.14<ref name=Anderson2012/> |
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| ARICNS = }} |
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}} |
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{{starbox sources|HIP|CCDM|HR}} |
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{{Starbox orbit |
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| reference = <ref name=aj76_544/> |
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| period_unitless = 3.32068 days |
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| axis = <!--Semimajor axis (in arcseconds)--> |
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| axis_unitless = <!--Semimajor axis (no units provided by template)--> |
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| eccentricity = 0.025 |
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| inclination = <!--Inclination (in degrees)--> |
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| node = <!--Longitude of node (in degrees)--> |
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| periastron = [[Julian day|JD]] 2423210.628 |
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| periarg = 43 |
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| periarg_primary = <!--Argument of periastron (in degrees), primary --> |
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| k1 = 37.2 |
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| k2 = <!-- Velocity semi-amplitude (secondary in SB2), in km/s --> |
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}} |
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{{Starbox detail |
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| component1 = A |
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| mass = 2.39<ref name=De_Rosa_et_al_2014/> |
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| radius = 1.8–2.5<ref name=aaa367_521/> |
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| luminosity = 34<ref name=Anderson2012/> |
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| temperature = 9,509<ref name=aaa515_A11/> |
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| metal_fe = +0.47<ref name=aaa515_A11/> |
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| gravity = 4.30<ref name=aaa515_A11/> |
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| rotational_velocity = 27<ref name=aaa463_2_671/> |
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| age_myr = 280<ref name=De_Rosa_et_al_2014/> |
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| component2 = B |
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| mass2 = 0.40<ref name=De_Rosa_et_al_2014/> |
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}} |
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{{Starbox catalog |
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| names = {{odlist | B=φ Aql | F=61 Aql | BD=+11° 4055 | FK5=3590 | HD=188728 | HIP=98103 | HR=7610 | SAO=105438 }}<ref name=SIMBAD/> |
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}} |
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{{Starbox reference |
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|Simbad=phi+Aql |
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}} |
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{{Starbox end}} |
{{Starbox end}} |
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'''Phi Aquilae''' (φ Aql / φ Aquilae) is a [[binary star]] in the [[constellation]] [[Aquila (constellation)|Aquila]]. |
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'''Phi Aquilae''', [[Latinisation of names|Latinized]] from φ Aquilae, is the [[Bayer designation]] of a [[binary star]]<ref name=mnras389_2_869/> system in the [[celestial equator|equatorial]] [[constellation]] of [[Aquila (constellation)|Aquila]]. It has an [[apparent visual magnitude]] of +5.28<ref name=aaass52_131/> and is visible to the naked eye. With an annual [[parallax]] shift of {{val|14.198|ul=mas}},<ref name=GaiaDR2/> this star is located at a distance of approximately {{Convert|230|ly|pc|abbr=off|lk=on}} from Earth. It is drifting closer with a [[radial velocity]] of –27 km/s.<ref name=gcrv1953/> Based on its motion through space, this system is considered a possible member of the nearby [[Argus Association|Argus association]] of co-moving stars, although it may be too old.<ref name=Zuckerman2019/> |
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'''Phi Aquilae''' is a [[spectroscopic binary]] which is classified as a white [[stellar classification|A-type]] [[subgiant]] with an [[apparent magnitude]] of +5.28. The binary has an orbital period of 3.32 days and is approximately 206 [[light years]] from [[Earth]]. |
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Phi Aquilae is a single-lined [[spectroscopic binary]] with an [[orbital period]] of 3.32068 days.<ref name=aj76_544/> The pair have a [[projected separation]] of {{val|190.4|ul=AU}} as of 2008.<ref name=De_Rosa_et_al_2014/> The primary component is a [[subgiant star]] with a [[stellar classification]] of A1 IV.<ref name=aj74_375/> The star is around 280<ref name=De_Rosa_et_al_2014/> million years old and is spinning with a [[projected rotational velocity]] of 27.<ref name=aaa463_2_671/> It has 2.39<ref name=De_Rosa_et_al_2014/> times the mass of the Sun and somewhere in the range of 1.8–2.5<ref name=aaa367_521/> times the [[Sun's radius]]. The [[stellar atmosphere|outer atmosphere]] has an [[effective temperature]] of 9,509 K,<ref name=aaa515_A11/> giving it the white-hued appearance of an [[A-type star]].<ref name=csiro/> It is radiating 34<ref name=Anderson2012/> times the luminosity of the Sun. |
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The orbiting companion may be the source of the [[X-ray astronomy|X-ray emission]] from this system, as stars similar to the primary component do not generally produce detectable levels of X-rays.<ref name=mnras415_1_854/> It has 40% of the mass of the Sun.<ref name=De_Rosa_et_al_2014/> |
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==References== |
==References== |
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{{reflist|refs= |
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<ref name=GaiaDR2>{{Cite Gaia DR2|4303843863840722944}}</ref> |
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<ref name=Anderson2012>{{citation |
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| title=XHIP: An extended hipparcos compilation |
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| last1=Anderson | first1=E. | last2=Francis | first2=Ch. |
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| journal=Astronomy Letters |
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| volume=38 | issue=5 | pages=331 | year=2012 |
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| bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 |
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| arxiv=1108.4971 | s2cid=119257644 | postscript=. }}</ref> |
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<ref name=mnras389_2_869>{{citation | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | title=A catalogue of multiplicity among bright stellar systems | journal=[[Monthly Notices of the Royal Astronomical Society]] | volume=389 | issue=2 | pages=869–879 |date=September 2008 | doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | bibcode=2008MNRAS.389..869E | postscript=. |arxiv = 0806.2878 | s2cid=14878976 }}</ref> |
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<ref name=aaa515_A11>{{citation | last1=Soubiran | first1=C. | last2=Le Campion | first2=J.-F. | last3=Cayrel de Strobel | first3=G. | last4=Caillo | first4=A. | title=The PASTEL catalogue of stellar parameters | journal=Astronomy and Astrophysics | volume=515 | page=A111 |date=June 2010 | doi=10.1051/0004-6361/201014247 | bibcode=2010A&A...515A.111S | postscript=. |arxiv = 1004.1069 | s2cid=118362423 }}</ref> |
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<ref name=aj74_375>{{citation | display-authors=1 | last1=Cowley | first1=A. | last2=Cowley | first2=C. | last3=Jaschek | first3=M. | last4=Jaschek | first4=C. | title=A study of the bright A stars. I. A catalogue of spectral classifications | journal=Astronomical Journal | volume=74 | pages=375–406 |date=April 1969 | doi=10.1086/110819 | bibcode=1969AJ.....74..375C | postscript=. }}</ref> |
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<ref name=gcrv1953>{{citation | last=Wilson | first=Ralph Elmer | year=1953 | title=General catalogue of stellar radial velocities | journal=Carnegie Institute Washington D.C. Publication | publisher=Carnegie Institution of Washington | bibcode=1953GCRV..C......0W | postscript=. }}</ref> |
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<ref name=aaa463_2_671>{{citation | last1=Royer | first1=F. | last2=Zorec | first2=J. | last3=Gómez | first3=A. E. | title=Rotational velocities of A-type stars. III. Velocity distributions | journal=Astronomy and Astrophysics | volume=463 | issue=2 | pages=671–682 |date=February 2007 | doi=10.1051/0004-6361:20065224 | bibcode=2007A&A...463..671R | arxiv=astro-ph/0610785 | s2cid=18475298 | postscript=. }}</ref> |
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<ref name=SIMBAD>{{citation | title=phi Aql -- Star | work=SIMBAD | publisher=Centre de Données astronomiques de Strasbourg | url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=Phi+Aquilae | access-date=2012-07-21 | postscript=. }}</ref> |
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<ref name=aaass52_131>{{citation | last1=Oja | first1=T. | title=UBV photometry of FK4 and FK4 supplement stars | journal=Astronomy and Astrophysics Supplement Series | volume=52 | pages=131–134 |date=April 1983 | bibcode=1983A&AS...52..131O | postscript=. }}</ref> |
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<ref name=mnras415_1_854>{{citation | display-authors=1 | last1=De Rosa | first1=R. J. | last2=Bulger | first2=J. | last3=Patience | first3=J. | last4=Leland | first4=B. | last5=Macintosh | first5=B. | last6=Schneider | first6=A. | last7=Song | first7=I. | last8=Marois | first8=C. | last9=Graham | first9=J. R. | last10=Bessell | first10=M. | last11=Doyon | first11=R. | title=The Volume-limited A-Star (VAST) survey - I. Companions and the unexpected X-ray detection of B6-A7 stars | journal=Monthly Notices of the Royal Astronomical Society | volume=415 | issue=1 | pages=854–866 |date=July 2011 | doi=10.1111/j.1365-2966.2011.18765.x | doi-access=free | bibcode=2011MNRAS.415..854D | postscript=. |arxiv = 1103.4363 | s2cid=84181878 }}</ref> |
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<ref name=aj76_544>{{citation | last1=Lucy | first1=L. B. | last2=Sweeney | first2=M. A.|author2-link=Mary Ann Sweeney | title=Spectroscopic binaries with circular orbits | journal=Astronomical Journal | volume=76 | pages=544–556 |date=August 1971 | doi=10.1086/111159 | bibcode=1971AJ.....76..544L | postscript=. | doi-access=free }}</ref> |
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<ref name=csiro>{{citation | title=The Colour of Stars | date=December 21, 2004 | work=Australia Telescope, Outreach and Education | publisher=Commonwealth Scientific and Industrial Research Organisation | url=http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html | access-date=2012-01-16 | archive-url=https://web.archive.org/web/20120318151427/http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html | archive-date=March 18, 2012 | url-status=dead }}</ref> |
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<ref name=aaa367_521>{{citation | display-authors=1 | last1=Pasinetti Fracassini | first1=L. E. | last2=Pastori | first2=L. | last3=Covino | first3=S. | last4=Pozzi | first4=A. | title=Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics | journal=Astronomy and Astrophysics | volume=367 | pages=521–524 |date=February 2001 | issue=2 | doi=10.1051/0004-6361:20000451 | bibcode=2001A&A...367..521P | arxiv=astro-ph/0012289 | s2cid=425754 | postscript=. }}</ref> |
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<ref name=Zuckerman2019>{{citation |
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| title=The Nearby, Young, Argus Association: Membership, Age, and Dusty Debris Disks |
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| last=Zuckerman | first=B. |
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| journal=The Astrophysical Journal |
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| volume=870 | issue=1 | id=27 | pages=8 | date=January 2019 |
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| doi=10.3847/1538-4357/aaee66 | arxiv=1811.01508 |
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| bibcode=2019ApJ...870...27Z | s2cid=119452542 | postscript=. | doi-access=free }}</ref> |
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<ref name=De_Rosa_et_al_2014>{{citation | postscript=. |
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| title=The VAST Survey - III. The multiplicity of A-type stars within 75 pc |
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| last1=De Rosa | first1=R. J. | last2=Patience | first2=J. |
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| last3=Wilson | first3=P. A. | last4=Schneider | first4=A. |
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| last5=Wiktorowicz | first5=S. J. | last6=Vigan | first6=A. |
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| last7=Marois | first7=C. | last8=Song | first8=I. |
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| last9=Macintosh | first9=B. | last10=Graham | first10=J. R. |
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| last11=Doyon | first11=R. | last12=Bessell | first12=M. S. |
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| last13=Thomas | first13=S. | last14=Lai | first14=O. |
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| journal=Monthly Notices of the Royal Astronomical Society |
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| volume=437 | issue=2 | pages=1216–1240 | year=2014 |
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| bibcode=2014MNRAS.437.1216D| doi=10.1093/mnras/stt1932 |
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| arxiv=1311.7141 | doi-access=free }}</ref> |
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}} |
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==External links== |
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* [http://simbad.u-strasbg.fr/simbad/sim-id?Ident=Phi+Aquilae&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id Simbad Phi Aquilae] |
* [http://simbad.u-strasbg.fr/simbad/sim-id?Ident=Phi+Aquilae&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id Simbad Phi Aquilae] |
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* [http://aladin.u-strasbg.fr/AladinPreview?-c=19+56+14.2519%2B11+25+25.395&ident=HD+188728&submit=Aladin+previewer Image] |
* [http://aladin.u-strasbg.fr/AladinPreview?-c=19+56+14.2519%2B11+25+25.395&ident=HD+188728&submit=Aladin+previewer Image] |
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* [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%207610 HR 7610] |
* [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%207610 HR 7610] |
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{{Stars of Aquila}} |
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{{subgiant-star-stub}} |
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[[Category:HD_and_HDE_objects]] |
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[[Category:Bayer objects|Aquilae, Phi]] |
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[[Category:Aquila constellation]] |
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[[Category:Spectroscopic binaries]] |
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[[Category:A-type subgiants]] |
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{{DEFAULTSORT:Phi Aquilae}} |
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{{star-system-stub}} |
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<!-- Properties --> |
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[[ |
[[Category:A-type subgiants]] |
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[[Category:Spectroscopic binaries]] |
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[[it:Phi Aquilae]] |
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<!-- Other --> |
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[[Category:Aquila (constellation)]] |
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[[Category:Bayer objects|Aquilae, Phi]] |
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[[Category:Durchmusterung objects|BD+11 4055]] |
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[[Category:Henry Draper Catalogue objects|188728]] |
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[[Category:Flamsteed objects|Aquilae, 61]] |
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[[Category:Hipparcos objects|098103]] |
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[[Category:Bright Star Catalogue objects|7610]] |
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Latest revision as of 06:41, 21 August 2024
  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 19h 56m 14.25183s[1] |
| Declination | +11° 25′ 25.3931″[1] |
| Apparent magnitude (V) | +5.28[2] |
| Characteristics | |
| Spectral type | A1 IV[3] |
| U−B color index | –0.02[2] |
| B−V color index | +0.00[2] |
| Astrometry | |
| Radial velocity (Rv) | –27.2[4] km/s |
| Proper motion (μ) | RA: +32.826[1] mas/yr Dec.: +6.162[1] mas/yr |
| Parallax (π) | 14.1980 ± 0.1579 mas |
| Distance | 230 ± 3 ly (70.4 ± 0.8 pc) |
| Absolute magnitude (MV) | +1.14[5] |
| Orbit[6] | |
| Period (P) | 3.32068 days |
| Eccentricity (e) | 0.025 |
| Periastron epoch (T) | JD 2423210.628 |
| Argument of periastron (ω) (secondary) | 43° |
| Semi-amplitude (K1) (primary) | 37.2 km/s |
| Details | |
| A | |
| Mass | 2.39[7] M☉ |
| Radius | 1.8–2.5[8] R☉ |
| Luminosity | 34[5] L☉ |
| Surface gravity (log g) | 4.30[9] cgs |
| Temperature | 9,509[9] K |
| Metallicity [Fe/H] | +0.47[9] dex |
| Rotational velocity (v sin i) | 27[10] km/s |
| Age | 280[7] Myr |
| B | |
| Mass | 0.40[7] M☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
Phi Aquilae, Latinized from φ Aquilae, is the Bayer designation of a binary star[12] system in the equatorial constellation of Aquila. It has an apparent visual magnitude of +5.28[2] and is visible to the naked eye. With an annual parallax shift of 14.198 mas,[1] this star is located at a distance of approximately 230 light-years (71 parsecs) from Earth. It is drifting closer with a radial velocity of –27 km/s.[4] Based on its motion through space, this system is considered a possible member of the nearby Argus association of co-moving stars, although it may be too old.[13]
Phi Aquilae is a single-lined spectroscopic binary with an orbital period of 3.32068 days.[6] The pair have a projected separation of 190.4 AU as of 2008.[7] The primary component is a subgiant star with a stellar classification of A1 IV.[3] The star is around 280[7] million years old and is spinning with a projected rotational velocity of 27.[10] It has 2.39[7] times the mass of the Sun and somewhere in the range of 1.8–2.5[8] times the Sun's radius. The outer atmosphere has an effective temperature of 9,509 K,[9] giving it the white-hued appearance of an A-type star.[14] It is radiating 34[5] times the luminosity of the Sun.
The orbiting companion may be the source of the X-ray emission from this system, as stars similar to the primary component do not generally produce detectable levels of X-rays.[15] It has 40% of the mass of the Sun.[7]
References
[edit]- ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c d Oja, T. (April 1983), "UBV photometry of FK4 and FK4 supplement stars", Astronomy and Astrophysics Supplement Series, 52: 131–134, Bibcode:1983A&AS...52..131O.
- ^ a b Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819.
- ^ a b Wilson, Ralph Elmer (1953), "General catalogue of stellar radial velocities", Carnegie Institute Washington D.C. Publication, Carnegie Institution of Washington, Bibcode:1953GCRV..C......0W.
- ^ a b c Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
- ^ a b Lucy, L. B.; Sweeney, M. A. (August 1971), "Spectroscopic binaries with circular orbits", Astronomical Journal, 76: 544–556, Bibcode:1971AJ.....76..544L, doi:10.1086/111159.
- ^ a b c d e f g De Rosa, R. J.; Patience, J.; Wilson, P. A.; Schneider, A.; Wiktorowicz, S. J.; Vigan, A.; Marois, C.; Song, I.; Macintosh, B.; Graham, J. R.; Doyon, R.; Bessell, M. S.; Thomas, S.; Lai, O. (2014), "The VAST Survey - III. The multiplicity of A-type stars within 75 pc", Monthly Notices of the Royal Astronomical Society, 437 (2): 1216–1240, arXiv:1311.7141, Bibcode:2014MNRAS.437.1216D, doi:10.1093/mnras/stt1932.
- ^ a b Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics", Astronomy and Astrophysics, 367 (2): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
- ^ a b c d Soubiran, C.; Le Campion, J.-F.; Cayrel de Strobel, G.; Caillo, A. (June 2010), "The PASTEL catalogue of stellar parameters", Astronomy and Astrophysics, 515: A111, arXiv:1004.1069, Bibcode:2010A&A...515A.111S, doi:10.1051/0004-6361/201014247, S2CID 118362423.
- ^ a b Royer, F.; Zorec, J.; Gómez, A. E. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics, 463 (2): 671–682, arXiv:astro-ph/0610785, Bibcode:2007A&A...463..671R, doi:10.1051/0004-6361:20065224, S2CID 18475298.
- ^ "phi Aql -- Star", SIMBAD, Centre de Données astronomiques de Strasbourg, retrieved 2012-07-21.
- ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
- ^ Zuckerman, B. (January 2019), "The Nearby, Young, Argus Association: Membership, Age, and Dusty Debris Disks", The Astrophysical Journal, 870 (1): 8, arXiv:1811.01508, Bibcode:2019ApJ...870...27Z, doi:10.3847/1538-4357/aaee66, S2CID 119452542, 27.
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