Constraints on the richness-mass relation and the optical-SZE positional offset distribution for SZE-selected clusters
Abstract
In this study, we cross-match galaxy cluster candidates selected via their Sunyaev–Zel'dovich effect (SZE) signatures in 129.1 deg2 of the South Pole Telescope 2500d SPT-SZ survey with optically identified clusters selected from the Dark Energy Survey science verification data. We identify 25 clusters between 0.1 ≲ z ≲ 0.8 in the union of the SPT-SZ and redMaPPer (RM) samples. RM is an optical cluster finding algorithm that also returns a richness estimate for each cluster. We model the richness λ-mass relation with the following function 500> ∝ BλlnM500 + CλlnE(z) and use SPT-SZ cluster masses and RM richnesses λ to constrain the parameters. We find Bλ = 1.14+0.21–0.18 and Cλ = 0.73+0.77–0.75. The associated scatter in mass at fixed richness is σlnM|λ = 0.18+0.08–0.05 at a characteristic richness λ = 70. We demonstrate that our model provides an adequate description of the matched sample, showing that the fraction of SPT-SZ-selected clusters with RM counterparts is consistent with expectations and that the fraction of RM-selected clusters with SPT-SZ counterparts is in mild tension with expectation. We model the optical-SZE cluster positional offset distribution with the sum of two Gaussians, showing that it is consistent with a dominant, centrally peaked population andmore »
- Authors:
-
- Ludwig-Maximilians-Univ., Muenchen (Germany); Excellence Cluster Universe, Garching (Germany). et al.
- Publication Date:
- Research Org.:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Org.:
- DES
- OSTI Identifier:
- 1212689
- Alternate Identifier(s):
- OSTI ID: 1246801
- Report Number(s):
- FERMILAB-PUB-15-295-AE; BNL-111978-2016-JA
Journal ID: ISSN 0035-8711; arXiv eprint number arXiv:1506.07814
- Grant/Contract Number:
- AC02-07CH11359; SC00112704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Monthly Notices of the Royal Astronomical Society
- Additional Journal Information:
- Journal Volume: 454; Journal Issue: 3; Journal ID: ISSN 0035-8711
- Publisher:
- Royal Astronomical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; catalogues; methods: data analysis; galaxies: abundances; galaxies: clusters: general; galaxies: haloes; galaxies: statistics; cosmology: miscellaneous; large-scale structure of Universe
Citation Formats
Saro, A. Constraints on the richness-mass relation and the optical-SZE positional offset distribution for SZE-selected clusters. United States: N. p., 2015.
Web. doi:10.1093/mnras/stv2141.
Saro, A. Constraints on the richness-mass relation and the optical-SZE positional offset distribution for SZE-selected clusters. United States. https://doi.org/10.1093/mnras/stv2141
Saro, A. Mon .
"Constraints on the richness-mass relation and the optical-SZE positional offset distribution for SZE-selected clusters". United States. https://doi.org/10.1093/mnras/stv2141. https://www.osti.gov/servlets/purl/1212689.
@article{osti_1212689,
title = {Constraints on the richness-mass relation and the optical-SZE positional offset distribution for SZE-selected clusters},
author = {Saro, A.},
abstractNote = {In this study, we cross-match galaxy cluster candidates selected via their Sunyaev–Zel'dovich effect (SZE) signatures in 129.1 deg2 of the South Pole Telescope 2500d SPT-SZ survey with optically identified clusters selected from the Dark Energy Survey science verification data. We identify 25 clusters between 0.1 ≲ z ≲ 0.8 in the union of the SPT-SZ and redMaPPer (RM) samples. RM is an optical cluster finding algorithm that also returns a richness estimate for each cluster. We model the richness λ-mass relation with the following function 500> ∝ BλlnM500 + CλlnE(z) and use SPT-SZ cluster masses and RM richnesses λ to constrain the parameters. We find Bλ = 1.14+0.21–0.18 and Cλ = 0.73+0.77–0.75. The associated scatter in mass at fixed richness is σlnM|λ = 0.18+0.08–0.05 at a characteristic richness λ = 70. We demonstrate that our model provides an adequate description of the matched sample, showing that the fraction of SPT-SZ-selected clusters with RM counterparts is consistent with expectations and that the fraction of RM-selected clusters with SPT-SZ counterparts is in mild tension with expectation. We model the optical-SZE cluster positional offset distribution with the sum of two Gaussians, showing that it is consistent with a dominant, centrally peaked population and a subdominant population characterized by larger offsets. We also cross-match the RM catalogue with SPT-SZ candidates below the official catalogue threshold significance ξ = 4.5, using the RM catalogue to provide optical confirmation and redshifts for 15 additional clusters with ξ ϵ [4, 4.5].},
doi = {10.1093/mnras/stv2141},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 3,
volume = 454,
place = {United States},
year = {Mon Oct 12 00:00:00 EDT 2015},
month = {Mon Oct 12 00:00:00 EDT 2015}
}
Web of Science
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Optical follow-up study of 32 high-redshift galaxy cluster candidates from Planck with the William Herschel Telescope
text, January 2019
- Zohren, Hannah; Schrabback, Tim; van der Burg, Remco F. J.
- arXiv