publication . Preprint . 2020

Probing galaxy evolution in massive clusters using ACT and DES: splashback as a cosmic clock

Adhikari, Susmita; Shin, Tae-hyeon; Jain, Bhuvnesh; Hilton, Matt; Baxter, Eric; Chang, Chihway; Wechsler, Risa H.; Battaglia, Nick; Bond, J. Richard; Bocquet, Sebastian; ...
Open Access English
  • Published: 26 Aug 2020
Abstract
We measure the projected number density profiles of galaxies and the splashback feature in clusters selected by the Sunyaev--Zeldovich (SZ) effect from the Advanced Atacama Cosmology Telescope (AdvACT) survey using galaxies observed by the Dark Energy Survey (DES). The splashback radius for the complete galaxy sample is consistent with theoretical measurements from CDM-only simulations, and is located at $2.4^{+0.3}_{-0.4}$ Mpc $h^{-1}$. We split the sample based on galaxy color and find significant differences in the profile shapes. Red galaxies and those in the green valley show a splashback-like minimum in their slope profile consistent with theoretical predi...
Subjects
arXiv: Astrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics::Galaxy Astrophysics
free text keywords: Astrophysics - Astrophysics of Galaxies
Funded by
EC| COSMICDAWN
Project
COSMICDAWN
Understanding the Origin of Cosmic Structure
  • Funder: European Commission (EC)
  • Project Code: 306478
  • Funding stream: FP7 | SP2 | ERC
,
EC| COGS
Project
COGS
Capitalizing on Gravitational Shear
  • Funder: European Commission (EC)
  • Project Code: 240672
  • Funding stream: FP7 | SP2 | ERC
,
NSF| Collaborative Research: The Dark Energy Survey Data Management Operations
Project
  • Funder: National Science Foundation (NSF)
  • Project Code: 1138766
  • Funding stream: Directorate for Mathematical & Physical Sciences | Division of Astronomical Sciences
,
NSF| Advanced ACTPol
Project
  • Funder: National Science Foundation (NSF)
  • Project Code: 1440226
  • Funding stream: Directorate for Mathematical & Physical Sciences | Division of Astronomical Sciences
,
NSF| Collaborative Research with the Atacama Cosmology Telescope (ACT): Probing Fundamental Physics Through Observations of Cosmic Structure
Project
  • Funder: National Science Foundation (NSF)
  • Project Code: 0408698
  • Funding stream: Directorate for Mathematical & Physical Sciences | Division of Astronomical Sciences
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