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NGC 5850

NGC 5850 is a barred spiral galaxy in the constellation Virgo. Its speed relative to the cosmic microwave background is 2,735 ± 13 km/s,[1] which corresponds to a Hubble distance of 40.3 ± 2.8 Mpc (~131 million ly).[2] NGC 5850 was discovered by German-British astronomer William Herschel in 1786.[3]

NGC 5850
Observation data (J2000 epoch)
ConstellationVirgo
Right ascension15h 07m 08s
Declination+01° 32′ 39″
Heliocentric radial velocity2 545 ± 1 km/s
Distance131.5 ± 9.2 Mly (40.33 ± 2.83 Mpc)
Apparent magnitude (B)11.5
Surface brightness23 mag/arcsec2
Other designations
PGC 53979, UGC 9715, IRAS 15045+0144

Characteristics

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The luminosity class of NGC 5850 is II and it has a broad HI1 line.[4] It is also classified a LINER galaxy; a galaxy whose nucleus presents an emission spectrum characterized by broad lines of weakly ionized atoms.[5][6]

To date, seven non-redshift measurements yield a distance of 18.7 ± 1.75 Mpc (~61 million ly), which is far outside the Hubble distance values.[7] Note that it is with the average value of independent measurements, when they exist, that the NASA/IPAC database calculates the diameter of a galaxy and that consequently the diameter of NGC 5850 could be approximately 58.7 kpc (~191,000 ly) if we used the Hubble distance to calculate it.[8]

Morphology

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NGC 5850 was used by Gérard de Vaucouleurs as a galaxy of morphological type SB(r)b in his galaxy atlas.[9][10] It is classified as a prototype double-barred system early-type spiral galaxy by other studies as well.[11][12]

In 2002, Eskridge, Frogel and Pogge published a paper, describing the morphology of 205 closely spaced spiral galaxies. The observations were carried out in the H band of infrared and in the B band (blue). According to Eskridge and his colleagues, NGC 5850 is a spiral galaxy of type SB(r)ab in the B band and type SB(r)0/a in the H band. The isophotes of the outer bulb are almost circular. The nucleus appears elliptical. The bulb is crossed by a very long bar with ansae at its end. The bar is inclined at 60 degrees to the interior bulb. A complete inner ring is formed at the end of the bar and beyond there is a faint spiral structure. The spiral arms appear to form an incomplete outern pseudo-ring.[13] One of these spiral arms of NGC 5850 appears broken, likely caused by an interaction with a north-west object.[14]

Possible galaxy pair?

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NGC 5850 (left) and NGC 5846 (right) captured by Adam Block (from Mount Lemmon Observatory/University of Arizona).

NGC 5850 is close to its neighbor, NGC 5846. However, the distance between them is exactly 40 million light-years. Although they not a physical pair, it is possible that the two galaxies might have experienced a high-speed encounter around 200 million years ago.[15]

Supernova

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One supernova has been observed in NGC 5850: SN 1987B. It was discovered by Robert Evans on 24 February 1987 lying 71" west and 145" south of the nucleus, shining at magnitude 15.[16] The spectral analysis indicates that it was a non-conventional type II supernova.[17]

See also

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  • NGC 5846, thought to have caused creation of NGC 5850[4]

References

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  1. ^ "NGC 5850 and 5846 in Virgo". www.jthommes.com. Retrieved 2024-04-16.
  2. ^ "NGC 5850". www.phys.ttu.edu. Retrieved 2024-04-16.
  3. ^ "Celestial Atlas entry for NGC 5850". cseligman.com. Retrieved 2024-04-16.
  4. ^ a b info@noirlab.edu. "NGC 5850". www.noirlab.edu. Retrieved 2024-04-16.
  5. ^ "NGC 5850 - LINER-type Active Galactic Nucleus". simbad.u-strasbg.fr. Retrieved 2024-08-08.
  6. ^ Bremer, M.; Scharwächter, J.; Eckart, A.; Valencia-S, M.; Zuther, J.; Combes, F.; Garcia-Burillo, S.; Fischer, S. (2013-10-01). "What produces the extended LINER-type emission in the NUGA galaxy NGC 5850?". Astronomy & Astrophysics. 558: A34. arXiv:1308.3492. doi:10.1051/0004-6361/201322009. ISSN 0004-6361.
  7. ^ "NASA/IPAC Extragalactic Database". Results for NGC 5850. Retrieved 27 July 2024.
  8. ^ "NED Query Results for NGC 5850". ned.ipac.caltech.edu. Retrieved 2024-08-08.
  9. ^ "NGC 5850". kudzu.astr.ua.edu. Retrieved 2024-08-08.
  10. ^ "Gérard de Vaucouleurs' Atlas of Galaxies". cseligman.com. Retrieved 2024-08-08.
  11. ^ Bremer, M.; Scharwächter, J.; Eckart, A.; Zuther, J.; Fischer, S.; Valencias-S., M.; Combes, F.; Garcia-Burillo, S. (2013-05-08), The Central 3 kpc of NGC 5850, arXiv:1305.1802
  12. ^ Buta, R.; Crocker, D. A. (1993-04-01). "Metric Characteristics of Nuclear Rings and Related Features in Spiral Galaxies". The Astronomical Journal. 105: 1344. Bibcode:1993AJ....105.1344B. doi:10.1086/116514. ISSN 0004-6256.
  13. ^ Eskridge, Paul B.; Frogel, Jay A.; Pogge, Richard W.; Quillen, Alice C.; Berlind, Andreas A.; Davies, Roger L.; DePoy, D. L.; Gilbert, Karoline M.; Houdashelt, Mark L.; Kuchinski, Leslie E.; Ramirez, Solange V.; Sellgren, K.; Stutz, Amelia; Terndrup, Donald M.; Tiede, Glenn P. (November 2002). "Near-Infrared and Optical Morphology of Spiral Galaxies". The Astrophysical Journal Supplement Series. 143 (1): 73–111. arXiv:astro-ph/0206320. Bibcode:2002ApJS..143...73E. doi:10.1086/342340.
  14. ^ Prieto, Mercedes; Gottesman, S. T.; Aguerri, Jose-Alfonso L.; Varela, Antonia-Maria (October 1997). "Structural Components of NGC 5850". The Astronomical Journal. 114: 1413. Bibcode:1997AJ....114.1413P. doi:10.1086/118573. ISSN 0004-6256.
  15. ^ Higdon, James L.; Buta, Ronald J.; Purcell, Guy B. (1998-01-01). "An Optical and H i Study of NGC 5850: Victim of a High-Speed Encounter?". The Astronomical Journal. 115 (1): 80–104. Bibcode:1998AJ....115...80H. doi:10.1086/300193. ISSN 0004-6256.
  16. ^ Transient Name Server entry for SN 1987B. Retrieved 27 July 2024.
  17. ^ Tsvetkov, D. Y. (1 April 1989). "Observations of Supernovae 1987B and 1987F". Soviet Astronomy Letters. 15: 129. Bibcode:1989SvAL...15..129T.

Further bibliography

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