Velocity Dispersions of Brightest Cluster Galaxies and Their Host Clusters
We explore connections between brightest cluster galaxies (BCGs) and their host clusters. We first construct a HeCS-omnibus cluster sample including 227 galaxy clusters within 0.02 < z < 0.30; the total number of spectroscopic members from MMT/Hectospec and SDSS observations is 52325. Taking a...
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| Veröffentlicht in: | The Astrophysical journal 2020-03, Vol.891 (2), p.129 |
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| creator | Sohn, Jubee Geller, Margaret J. Diaferio, Antonaldo Rines, Kenneth J. |
| description | We explore connections between brightest cluster galaxies (BCGs) and their host clusters. We first construct a HeCS-omnibus cluster sample including 227 galaxy clusters within 0.02 < z < 0.30; the total number of spectroscopic members from MMT/Hectospec and SDSS observations is 52325. Taking advantage of the large spectroscopic sample, we compute physical properties of the clusters including the dynamical mass and cluster velocity dispersion ( cl). We also measure the central stellar velocity dispersion of the BCGs ( ) to examine the relation between BCG velocity dispersion and cluster velocity dispersion for the first time. The observed relation between BCG velocity dispersion and the cluster velocity dispersion is remarkably tight. Interestingly, the ratio decreases as a function of cl unlike the prediction from the numerical simulation of Dolag et al. The trend in suggests that BCG formation is more efficient in lower mass halos. |
| doi_str_mv | 10.3847/1538-4357/ab6e6a |
| format | Article |
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The trend in suggests that BCG formation is more efficient in lower mass halos.</description><subject>Astrophysics</subject><subject>Brightest cluster galaxies</subject><subject>Computer simulation</subject><subject>Dispersion</subject><subject>Galactic clusters</subject><subject>Galaxies</subject><subject>Galaxy clusters</subject><subject>Galaxy dark matter halos</subject><subject>Halos</subject><subject>Numerical simulations</subject><subject>Physical properties</subject><subject>Redshift surveys</subject><subject>Spectroscopy</subject><subject>Stars & galaxies</subject><subject>Velocity</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp1kL1PwzAQxS0EEqWwM1piJdTxR2yPUKAFVWIpiM1yHJu6CnGwU4n-9yQKohPT6e7ee3f6AXCZoxsiKJ_ljIiMEsZnuixsoY_A5G90DCYIIZoVhL-fgrOUtkOLpZyA5zdbB-O7Pbz3qbUx-dAkGBy8i_5j09nUwXm9S52NcKFr_e1tgrqp4HpjfYTLcNinc3DidJ3sxW-dgtfHh_V8ma1eFk_z21VmCENdhp0wFUe8xIQ7aqRBSBKjheSkRJhLxwSrhCw1osZVhlHMilJqjbU2WApCpuBqzG1j-Nr1H6pt2MWmP6n6SM5zIinrVWhUmRhSitapNvpPHfcqR2ogpgY8asCjRmK95Xq0-NAeMv-V_wCD72zu</recordid><startdate>20200310</startdate><enddate>20200310</enddate><creator>Sohn, Jubee</creator><creator>Geller, Margaret J.</creator><creator>Diaferio, Antonaldo</creator><creator>Rines, Kenneth J.</creator><general>The American Astronomical Society</general><general>IOP Publishing</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>8FD</scope><scope>H8D</scope><scope>KL.</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0002-9254-144X</orcidid><orcidid>https://orcid.org/0000-0002-9146-4876</orcidid></search><sort><creationdate>20200310</creationdate><title>Velocity Dispersions of Brightest Cluster Galaxies and Their Host Clusters</title><author>Sohn, Jubee ; Geller, Margaret J. ; Diaferio, Antonaldo ; Rines, Kenneth J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c350t-2f8cd707b237f4c9c0093ca8973b0279f585d89ba04cfdc54256b9aa2aac29833</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Astrophysics</topic><topic>Brightest cluster galaxies</topic><topic>Computer simulation</topic><topic>Dispersion</topic><topic>Galactic clusters</topic><topic>Galaxies</topic><topic>Galaxy clusters</topic><topic>Galaxy dark matter halos</topic><topic>Halos</topic><topic>Numerical simulations</topic><topic>Physical properties</topic><topic>Redshift surveys</topic><topic>Spectroscopy</topic><topic>Stars & galaxies</topic><topic>Velocity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sohn, Jubee</creatorcontrib><creatorcontrib>Geller, Margaret J.</creatorcontrib><creatorcontrib>Diaferio, Antonaldo</creatorcontrib><creatorcontrib>Rines, Kenneth J.</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Sohn, Jubee</au><au>Geller, Margaret J.</au><au>Diaferio, Antonaldo</au><au>Rines, Kenneth J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Velocity Dispersions of Brightest Cluster Galaxies and Their Host Clusters</atitle><jtitle>The Astrophysical journal</jtitle><stitle>APJ</stitle><addtitle>Astrophys. 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| source | Institute of Physics Open Access Journal Titles |
| subjects | Astrophysics Brightest cluster galaxies Computer simulation Dispersion Galactic clusters Galaxies Galaxy clusters Galaxy dark matter halos Halos Numerical simulations Physical properties Redshift surveys Spectroscopy Stars & galaxies Velocity |
| title | Velocity Dispersions of Brightest Cluster Galaxies and Their Host Clusters |
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