Shock-induced stripping of satellite ISM CGM in IllustrisTNG clusters at z sim0
Update: 2022-11-30
Description
Shock-induced stripping of satellite ISM CGM in IllustrisTNG clusters at z sim0 by Hao Li et al. on Wednesday 30 November
Using the IllustrisTNG simulation, we study the interaction of large-scale
shocks with the circumgalactic medium (CGM) and interstellar medium (ISM) of
star-forming (SF) satellite galaxies in galaxy clusters. These shocks are
usually produced by mergers and massive accretion. Our visual inspection shows
that approximately half of SF satellites have encountered shocks in their host
clusters at $z\leq0.11$. After a satellite crosses a shock front and enters the
postshock region, the ram pressure on it is boosted significantly. Both the CGM
and ISM can be severely impacted, either by striping or compression. The
stripping of the ISM is particularly important for low-mass galaxies with $\log
(M_{*}/M_{\odot})<10$ and can occur even in the outskirts of galaxy clusters.
In comparison, satellites that do not interact with shocks lose their ISM only
in the inner regions of clusters. About half of the ISM is stripped within
about 0.6 Gyr after it crosses the shock front. Our results show that
shock-induced stripping plays an important role in quenching satellite galaxies
in clusters.
arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.07711v2
Using the IllustrisTNG simulation, we study the interaction of large-scale
shocks with the circumgalactic medium (CGM) and interstellar medium (ISM) of
star-forming (SF) satellite galaxies in galaxy clusters. These shocks are
usually produced by mergers and massive accretion. Our visual inspection shows
that approximately half of SF satellites have encountered shocks in their host
clusters at $z\leq0.11$. After a satellite crosses a shock front and enters the
postshock region, the ram pressure on it is boosted significantly. Both the CGM
and ISM can be severely impacted, either by striping or compression. The
stripping of the ISM is particularly important for low-mass galaxies with $\log
(M_{*}/M_{\odot})<10$ and can occur even in the outskirts of galaxy clusters.
In comparison, satellites that do not interact with shocks lose their ISM only
in the inner regions of clusters. About half of the ISM is stripped within
about 0.6 Gyr after it crosses the shock front. Our results show that
shock-induced stripping plays an important role in quenching satellite galaxies
in clusters.
arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.07711v2
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