| |  Online-Ressource |
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| Verfasst von: | Stuber, Sophia [VerfasserIn]  |
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| | Pety, Jerome [VerfasserIn] |
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| | Schinnerer, Eva [VerfasserIn] |
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| | Bigiel, Frank [VerfasserIn] |
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| | Usero, Antonio [VerfasserIn] |
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| | Bešlić, Ivana [VerfasserIn] |
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| | Querejeta, Miguel [VerfasserIn] |
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| | Jiménez-Donaire, Maria Jesús [VerfasserIn] |
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| | Leroy, Adam K. [VerfasserIn] |
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| | Brok, Jakob den [VerfasserIn] |
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| | Neumann, Lukas [VerfasserIn] |
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| | Eibensteiner, Cosima [VerfasserIn] |
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| | Teng, Yu-Hsuan [VerfasserIn] |
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| | Barnes, Ashley T. [VerfasserIn] |
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| | Chevance, Mélanie [VerfasserIn] |
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| | Colombo, Dario [VerfasserIn] |
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| | Dale, Daniel A. [VerfasserIn] |
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| | Glover, Simon [VerfasserIn] |
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| | Liu, Daizhong [VerfasserIn] |
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| | Pan, Hsi-An [VerfasserIn] |
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| Titel: | Surveying the whirlpool at arcseconds with NOEMA (SWAN) |
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| Verf.angabe: | Sophia K. Stuber, Jerome Pety, Eva Schinnerer, Frank Bigiel, Antonio Usero, Ivana Beslic, Miguel Querejeta, Maria J. Jimenez-Donaire, Adam Leroy, Jakob den Brok, Lukas Neumann, Cosima Eibensteiner, Yu-Hsuan Teng, Ashley Barnes, Melanie Chevance, Dario Colombo, Daniel A. Dale, Simon C. O. Glover, Daizhong Liu and Hsi-An Pan |
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| E-Jahr: | 2023 |
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| Jahr: | 20 December 2023 |
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| Umfang: | 11 S. |
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| Fussnoten: | Gesehen am 27.03.2024 |
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| Titel Quelle: | Enthalten in: Astronomy and astrophysics |
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| Ort Quelle: | Les Ulis : EDP Sciences, 1969 |
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| Jahr Quelle: | 2023 |
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| Band/Heft Quelle: | 680(2023), Artikel-ID L20, Seite 1-11 |
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| ISSN Quelle: | 1432-0746 |
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| Abstract: | We present the first results from "Surveying the Whirlpool at Arcseconds with NOEMA" (SWAN), an IRAM Northern Extended Millimetre Array (NOEMA)+30 m large program that maps emission from several molecular lines at 90 and 110 GHz in the iconic nearby grand-design spiral galaxy M 51 at a cloud-scale resolution (similar to 3'' = 125 pc). As part of this work, we have obtained the first sensitive cloud-scale map of N(2)H(+)10 of the inner similar to 5 x 7 kpc of a normal star-forming galaxy, which we compared to HCN10 and 12 CO10 emission to test their ability in tracing dense, star-forming gas. The average N2H+-to-HCN line ratio of our total FoV is 0.20 +/- 0.09, with strong regional variations of a factor of >= 2 throughout the disk, including the south-western spiral arm and the center. The central similar to 1 kpc exhibits elevated HCN emission compared to N2H+, probably caused by AGN-driven excitation effects. We find that HCN and N2H+ are strongly super-linearily correlated in intensity (rho(Sp)similar to 0.8), with an average scatter of similar to 0.14 dex over a span of greater than or similar to 1.5 dex in intensity. When excluding the central region, the data are best described by a power law of an exponent of 1.2, indicating that there is more N2H+ per unit HCN in brighter regions. Our observations demonstrate that the HCN-to-CO line ratio is a sensitive tracer of gas density in agreement with findings of recent galactic studies utilising N2H+. The peculiar line ratios present near the AGN and the scatter of the power-law fit in the disk suggest that in addition to a first-order correlation with gas density, second-order physics (such as optical depth, gas temperature) or chemistry (abundance variations) are encoded in the N2H+/12 CO, HCN/12 CO, and N2H+/HCN ratios. |
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| DOI: | doi:10.1051/0004-6361/202348205 |
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| URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.
kostenfrei: Volltext: https://doi.org/10.1051/0004-6361/202348205 |
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| | kostenfrei: Volltext: https://www.aanda.org/articles/aa/full_html/2023/12/aa48205-23/aa48205-23.html |
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| | DOI: https://doi.org/10.1051/0004-6361/202348205 |
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| Datenträger: | Online-Ressource |
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| Sprache: | eng |
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| Sach-SW: | 100 PC SCALES |
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| | CLOUD |
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| | DENSE MOLECULAR GAS |
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| | FORMATION LAW |
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| | FORMATION RATES |
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| | galaxies: individual: M 51 |
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| | galaxies: ISM |
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| | ISM: molecules |
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| | LINE EMISSION |
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| | MILKY-WAY |
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| | NEARBY GALAXIES |
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| | SPIRAL-ARM |
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| | STAR-FORMATION EFFICIENCY |
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| K10plus-PPN: | 1884474640 |
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| Verknüpfungen: | → Zeitschrift |
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Surveying the whirlpool at arcseconds with NOEMA (SWAN) / Stuber, Sophia [VerfasserIn]; 20 December 2023 (Online-Ressource)
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