Using the Outskirts of Galaxy Clusters to Determine Their Mass Accretion Rate
We explore the possibility of using the external regions of galaxy clusters to measure their mass accretion rate (MAR). The main goal is to provide a method to observationally investigate the growth of structures on the nonlinear scales of galaxy clusters. We derive the MAR by using the mass profile...
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Online Access: | http://www.mdpi.com/2075-4434/4/4/79 |
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doaj-966f98e7b0504b49b54a704f3f92eba02020-11-25T00:23:40ZengMDPI AGGalaxies2075-44342016-12-01447910.3390/galaxies4040079galaxies4040079Using the Outskirts of Galaxy Clusters to Determine Their Mass Accretion RateCristiano De Boni0Institut d’Astrophysique Spatiale, CNRS (UMR8617) Université Paris-Sud 11, Bât. 121, F-91405 Orsay, FranceWe explore the possibility of using the external regions of galaxy clusters to measure their mass accretion rate (MAR). The main goal is to provide a method to observationally investigate the growth of structures on the nonlinear scales of galaxy clusters. We derive the MAR by using the mass profile beyond the splashback radius, evaluating the mass of a spherical shell and the time it takes to fall in. The infall velocity of the shell is extracted from N-body simulations. The average MAR returned by our prescription in the redshift range z = [ 0 , 2 ] is within 20%–40% of the average MAR derived from the merger trees of dark matter haloes in the reference N-body simulations. Our result suggests that the external regions of galaxy clusters can be used to measure the mean MAR of a sample of clusters.http://www.mdpi.com/2075-4434/4/4/79galaxies clusters: generalmethods: N-body simulationscosmology: theory |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Cristiano De Boni |
spellingShingle |
Cristiano De Boni Using the Outskirts of Galaxy Clusters to Determine Their Mass Accretion Rate Galaxies galaxies clusters: general methods: N-body simulations cosmology: theory |
author_facet |
Cristiano De Boni |
author_sort |
Cristiano De Boni |
title |
Using the Outskirts of Galaxy Clusters to Determine Their Mass Accretion Rate |
title_short |
Using the Outskirts of Galaxy Clusters to Determine Their Mass Accretion Rate |
title_full |
Using the Outskirts of Galaxy Clusters to Determine Their Mass Accretion Rate |
title_fullStr |
Using the Outskirts of Galaxy Clusters to Determine Their Mass Accretion Rate |
title_full_unstemmed |
Using the Outskirts of Galaxy Clusters to Determine Their Mass Accretion Rate |
title_sort |
using the outskirts of galaxy clusters to determine their mass accretion rate |
publisher |
MDPI AG |
series |
Galaxies |
issn |
2075-4434 |
publishDate |
2016-12-01 |
description |
We explore the possibility of using the external regions of galaxy clusters to measure their mass accretion rate (MAR). The main goal is to provide a method to observationally investigate the growth of structures on the nonlinear scales of galaxy clusters. We derive the MAR by using the mass profile beyond the splashback radius, evaluating the mass of a spherical shell and the time it takes to fall in. The infall velocity of the shell is extracted from N-body simulations. The average MAR returned by our prescription in the redshift range z = [ 0 , 2 ] is within 20%–40% of the average MAR derived from the merger trees of dark matter haloes in the reference N-body simulations. Our result suggests that the external regions of galaxy clusters can be used to measure the mean MAR of a sample of clusters. |
topic |
galaxies clusters: general methods: N-body simulations cosmology: theory |
url |
http://www.mdpi.com/2075-4434/4/4/79 |
work_keys_str_mv |
AT cristianodeboni usingtheoutskirtsofgalaxyclusterstodeterminetheirmassaccretionrate |
_version_ |
1725355641746227200 |