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
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:
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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