WALLABY Early Science - III. An HI Study of the Spiral Galaxy NGC 1566
| العنوان: | WALLABY Early Science - III. An HI Study of the Spiral Galaxy NGC 1566 |
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| المؤلفون: | B. Q. For, Wilfred M. Walsh, Albert Bosma, Claudia del P. Lagos, Martin Meyer, James R. Allison, J. P. Madrid, Attila Popping, Paolo Serra, P. Kamphuis, D. Kleiner, K. Lee-Waddell, Lijing Shao, Jiali Wang, O. I. Wong, Ahmed Elagali, Craig S. Anderson, G. Bekiaris, Tobias Westmeier, Se-Heon Oh, Lister Staveley-Smith, Virginia A. Kilborn, J. Rhee, B. S. Koribalski, George Heald, T. N. Reynolds, John D. Bunton, Maxim Voronkov |
| المساهمون: | Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | Monthly Notices of the Royal Astronomical Society Monthly Notices of the Royal Astronomical Society, 2019, 487 (2), pp.2797-2817. ⟨10.1093/mnras/stz1448⟩ |
| بيانات النشر: | arXiv, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Physics, radio lines: galaxies, Spiral galaxy, Stellar mass, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], Star formation, Dark matter, FOS: Physical sciences, Astronomy and Astrophysics, galaxies: starburst, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Virgo Cluster, Astrophysics - Astrophysics of Galaxies, Galaxy, Dark matter halo, galaxies: individual: NGC 1566, Space and Planetary Science, [SDU]Sciences of the Universe [physics], Astrophysics of Galaxies (astro-ph.GA), Galaxy rotation curve, galaxies: kinematics and dynamics, Astrophysics::Galaxy Astrophysics |
| الوصف: | This paper reports on the atomic hydrogen gas (HI) observations of the spiral galaxy NGC 1566 using the newly commissioned Australian Square Kilometre Array Pathfinder (ASKAP) radio telescope. We measure an integrated HI flux density of $180.2$ Jy km s$^{-1}$ emanating from this galaxy, which translates to an HI mass of $1.94\times10^{10}$M$_\circ$ at an assumed distance of $21.3$ Mpc. Our observations show that NGC 1566 has an asymmetric and mildly warped HI disc. The HI-to-stellar mass fraction of NGC 1566 is $0.29$, which is high in comparison with galaxies that have the same stellar mass ($10^{10.8}$M$_\circ$). We also derive the rotation curve of this galaxy to a radius of $50$ kpc and fit different mass models to it. The NFW, Burkert and pseudo-isothermal dark matter halo profiles fit the observed rotation curve reasonably well and recover dark matter fractions of $0.62$, $0.58$ and $0.66$, respectively. Down to the column density sensitivity of our observations ($N_{HI} = 3.7\times10^{19}$ cm$^{-2}$), we detect no HI clouds connected to, or in the nearby vicinity of, the HI disc of NGC 1566 nor nearby interacting systems. We conclude that, based on a simple analytic model, ram pressure interactions with the IGM can affect the HI disc of NGC 1566 and is possibly the reason for the asymmetries seen in the HI morphology of NGC 1566. Comment: Accepted for publication in MNRAS |
| تدمد: | 0035-8711 1365-2966 |
| DOI: | 10.48550/arxiv.1905.09491 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::71403a298fa6a7ba756888fc5c3e224d |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....71403a298fa6a7ba756888fc5c3e224d |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 00358711 13652966 |
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| DOI: | 10.48550/arxiv.1905.09491 |