Ram pressure candidates in UNIONS
Autor: | Masamune Oguri, Richard J. Wainscoat, K. C. Chambers, Stephen D. J. Gwyn, Mark E. Huber, Raphael Gavazzi, Jean-Charles Cuillandre, Michael J. Hudson, Rodrigo A. Ibata, Simona Mei, Martin Kilbinger, Alan W. McConnachie, Vanessa Hill, Raymond G. Carlberg, Yannick Mellier, Hisanori Furusawa, Satoshi Miyazaki, Pierre-Alain Duc, Ian D. Roberts, Laura C. Parker |
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Přispěvatelé: | Observatoire astronomique de Strasbourg (ObAS), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS) |
Jazyk: | angličtina |
Rok vydání: | 2022 |
Předmět: |
evolution
galaxies FOS: Physical sciences Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences 0103 physical sciences galaxies evolution Cluster (physics) clusters 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics Physics 010308 nuclear & particles physics Star formation irregular irregular Astrophysics - Astrophysics of Galaxies Astronomy and Astrophysics Astrophysics - Astrophysics of Galaxies Galaxy Ram pressure Space and Planetary Science [SDU]Sciences of the Universe [physics] general Astrophysics of Galaxies (astro-ph.GA) Halo general galaxies |
Zdroj: | Monthly Notices of the Royal Astronomical Society Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2021, ⟨10.1093/mnras/stab3101⟩ Monthly Notices of the Royal Astronomical Society, 509(1), 1342-1357 |
ISSN: | 0035-8711 1365-2966 |
Popis: | We present a search for disturbed, candidate ram pressure stripping galaxies across more than 50 spectroscopically selected SDSS groups and clusters. Forty-eight ram pressure candidates are visually identified in these systems using high quality UNIONS imaging from the Canada-France Hawaii Telescope, covering ~6200 and ~2800 square degrees in the u- and r-bands respectively. Ram pressure candidates are found in groups and clusters spanning a wide range in halo mass and include ~30 ram pressure candidates in the group regime ($M_h < 10^{14}$). The observed frequency of ram pressure candidates shows substantial scatter with group/cluster mass, but on average is larger in clusters ($M_h > 10^{14}\,M_\odot$) than groups ($M_h < 10^{14}\,M_\odot$) by a factor of ~2. We find that ram pressure candidates are most commonly low-mass galaxies and have enhanced star formation rates relative to star-forming field galaxies. The enhancement in star formation is largely independent of galaxy mass and strongest for galaxies in clusters. As a result of the large survey footprint and excellent image quality from UNIONS, we are able to identify disturbed galaxies, potentially affected by ram pressure stripping, across a wide range of host environment. 12 pages, 9 figures, 1 appendix, accepted for publication in MNRAS |
Databáze: | OpenAIRE |
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