A History of H i Stripping in Virgo: A Phase-space View of VIVA Galaxies

Abstract

We investigate the orbital histories of Virgo galaxies at various stages of H i gas stripping. In particular, we compare the location of galaxies with different H i morphology in phase space. This method is a great tool for tracing the gas stripping histories of galaxies as they fall into the cluster. Most galaxies at the early stage of H i stripping are found in the first infall region of Virgo, while galaxies undergoing active H i stripping mostly appear to be falling in or moving out near the cluster core for the first time. Galaxies with a severely stripped, yet symmetric, H i disks are found in one of two locations. Some are deep inside the cluster, but others are found in the cluster outskirts with low orbital velocities. We suggest that the latter group of galaxies belong to a "backsplash" population. These present the clearest candidates for backsplashed galaxies observationally identified to date. We further investigate the distribution of a large sample of H i-detected galaxies toward Virgo in phase space, confirming that most galaxies are stripped of their gas as they settle into the gravitational potential of the cluster. In addition, we discuss the impact of tidal interactions between galaxies and group preprocessing on the H i properties of the cluster galaxies, and link the associated star formation evolution to the stripping sequence of cluster galaxies.

Atomic hydrogen in IllustrisTNG galaxies: the impact of environment parallelled with local 21-cm surveys

“…In higher-mass haloes, a greater fraction of satellites are devoid of H i, with their occupancy extending to increasing radii. All of this falls in line with expectations and previous studies of ram-pressure stripping (see Gunn & Gott 1972;Yoon et al 2017).…”

GASP. I. Gas Stripping Phenomena in Galaxies with MUSE

“…Fig. 6 in Yoon et al 2007). At the time of observation the galaxy is crossing the 15% stripping line, and it will continue to get stripped if it reaches lower r cl .…”

GASP – XII. The variety of physical processes occurring in a single galaxy group in formation

“…Gasp galaxies are highlighted with red colors. ICM, gas rich galaxies avoid the "virialised" region of phasespace (Jaffé et al 2015;Yoon et al 2017), which is populated mostly by passive galaxies quenched by the hostile cluster environment (Jaffé et al 2016;Paccagnella et al 2017). Observations of Hi in group galaxies have further suggested that the processes quenching galaxies in clusters could scale to the group regime (see results from Catinella et al 2013;Hess & Wilcots 2013;Jaffé et al 2012Jaffé et al , 2016.…”