SIMBAD references

2019ApJ...873...42R - Astrophys. J., 873, 42-42 (2019/March-1)

Quenching low-mass satellite galaxies: evidence for a threshold ICM density.

ROBERTS I.D., PARKER L.C., BROWN T., JOSHI G.D., HLAVACEK-LARRONDO J. and WADSLEY J.

Abstract (from CDS):

We compile a sample of Sloan Digital Sky Survey (SDSS) galaxy clusters with high-quality Chandra X-ray data to directly study the influence of the dense intracluster medium (ICM) on the quenching of satellite galaxies. We study the quenched fractions of satellite galaxies as a function of ICM density for low- (109 <= M* <= 1010 M), intermediate- (1010 <= M* <= 1010.5 M), and high-mass (M* >= 1010.5 M) satellite galaxies with >3000 satellite galaxies across 24 low-redshift (z < 0.1) clusters. For low-mass galaxies we find evidence for a broken power-law trend between satellite quenched fraction and local ICM density. The quenched fraction increases modestly at ICM densities below a threshold before increasing sharply beyond this threshold toward the cluster center. We show that this increase in quenched fraction at high ICM density is well matched by a simple, analytic model of ram pressure stripping. These results are consistent with a picture where low-mass cluster galaxies experience an initial, slow-quenching mode driven by steady gas depletion, followed by rapid quenching associated with ram pressure of cold-gas stripping near (one-quarter of the virial radius, on average) the cluster center.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: clusters: general - galaxies: clusters: intracluster medium - galaxies: evolution - galaxies: star formation - X-rays: galaxies: clusters

Simbad objects: 25

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2019.12.12-20:54:46

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