Baryon content of massive galaxy clusters at 0.57 < z < 1.33
Here, we study the stellar, Brightest Cluster Galaxy (BCG) and intracluster medium (ICM) masses of 14 South Pole Telescope (SPT) selected galaxy clusters with median redshift z = 0.9 and median mass M 500 = 6 x 10 14 M ⊙ . We estimate stellar masses for each cluster and BCG using six photometric ban...
Published in: | Monthly Notices of the Royal Astronomical Society |
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Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
Language: | unknown |
Published: |
2022
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Subjects: | |
Online Access: | http://www.osti.gov/servlets/purl/1247532 https://www.osti.gov/biblio/1247532 https://doi.org/10.1093/mnras/stv2303 |
Summary: | Here, we study the stellar, Brightest Cluster Galaxy (BCG) and intracluster medium (ICM) masses of 14 South Pole Telescope (SPT) selected galaxy clusters with median redshift z = 0.9 and median mass M 500 = 6 x 10 14 M ⊙ . We estimate stellar masses for each cluster and BCG using six photometric bands spanning the range from the ultraviolet to the near-infrared observed with the VLT, HST and Spitzer. The ICM masses are derived from Chandra and XMM-Newton X-ray observations, and the virial masses are derived from the SPT Sunyaev-Zel'dovich Effect signature. At z = 0.9 the BCG mass M * BCG constitutes 0.12 ± 0.01% of the halo mass for a 6 x 10 14 M ⊙ cluster, and this fraction falls as M 500 -0.58±0.007 . The cluster stellar mass function has a characteristic mass M 0 = 10 11.0±0.1 M ⊙ , and the number of galaxies per unit mass in clusters is larger than in the field by a factor 1.65 ± 0.2. Both results are consistent with measurements on group scales and at lower redshift. |
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