Weak lensing analysis of CODEX clusters using dark energy camera legacy survey: Mass-richness relation
© 2019 The Author(s). We present the weak-lensing analysis of 279 CODEX clusters using imaging data from 4200 deg2 of the DECam Legacy Survey (DECaLS) Data Release 3. The cluster sample results from a joint selection in X-ray, optical richness in the range 20 ≤ λ < 110, and redshift in the range...
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th-cmuir.6653943832-683612020-04-02T15:30:17Z Weak lensing analysis of CODEX clusters using dark energy camera legacy survey: Mass-richness relation Anirut Phriksee Eric Jullo Marceau Limousin Huan Yuan Shan Alexis Finoguenov Siramas Komonjinda Suwicha Wannawichian Utane Sawangwit Earth and Planetary Sciences Physics and Astronomy © 2019 The Author(s). We present the weak-lensing analysis of 279 CODEX clusters using imaging data from 4200 deg2 of the DECam Legacy Survey (DECaLS) Data Release 3. The cluster sample results from a joint selection in X-ray, optical richness in the range 20 ≤ λ < 110, and redshift in the range 0.1 ≤ z ≤ 0.2. We model the cluster mass (M200c) and the richness relation with the expression (M200c|λ) ∞ M0(λ/40)Fλ. By measuring the CODEX cluster sample as an individual cluster, we obtain the best-fitting values, M0 = 3.24-0.27+0.29 × 1014M⊙, and Fλ = 1.00-0.22+0.22 for the richness scaling index, consistent with a power-law relation. Moreover, we separate the cluster sample into three richness groups; λ = 20-30, 30-50, and 50-110, and measure the stacked excess surface mass density profile in each group. The results show that both methods are consistent. In addition, we find an excellent agreement between our weak lensing based scaling relation and the relation obtained with dynamical masses estimated from cluster member velocity dispersions measured by the SDSS-IV/SPIDERS team. This suggests that the cluster dynamical equilibrium assumption involved in the dynamical mass estimates is statistically robust for a large sample of clusters. 2020-04-02T15:25:33Z 2020-04-02T15:25:33Z 2020-01-01 Journal 13652966 00358711 2-s2.0-85079689843 10.1093/mnras/stz3049 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85079689843&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/68361 |
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Earth and Planetary Sciences Physics and Astronomy Anirut Phriksee Eric Jullo Marceau Limousin Huan Yuan Shan Alexis Finoguenov Siramas Komonjinda Suwicha Wannawichian Utane Sawangwit Weak lensing analysis of CODEX clusters using dark energy camera legacy survey: Mass-richness relation |
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© 2019 The Author(s). We present the weak-lensing analysis of 279 CODEX clusters using imaging data from 4200 deg2 of the DECam Legacy Survey (DECaLS) Data Release 3. The cluster sample results from a joint selection in X-ray, optical richness in the range 20 ≤ λ < 110, and redshift in the range 0.1 ≤ z ≤ 0.2. We model the cluster mass (M200c) and the richness relation with the expression (M200c|λ) ∞ M0(λ/40)Fλ. By measuring the CODEX cluster sample as an individual cluster, we obtain the best-fitting values, M0 = 3.24-0.27+0.29 × 1014M⊙, and Fλ = 1.00-0.22+0.22 for the richness scaling index, consistent with a power-law relation. Moreover, we separate the cluster sample into three richness groups; λ = 20-30, 30-50, and 50-110, and measure the stacked excess surface mass density profile in each group. The results show that both methods are consistent. In addition, we find an excellent agreement between our weak lensing based scaling relation and the relation obtained with dynamical masses estimated from cluster member velocity dispersions measured by the SDSS-IV/SPIDERS team. This suggests that the cluster dynamical equilibrium assumption involved in the dynamical mass estimates is statistically robust for a large sample of clusters. |
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Anirut Phriksee Eric Jullo Marceau Limousin Huan Yuan Shan Alexis Finoguenov Siramas Komonjinda Suwicha Wannawichian Utane Sawangwit |
author_facet |
Anirut Phriksee Eric Jullo Marceau Limousin Huan Yuan Shan Alexis Finoguenov Siramas Komonjinda Suwicha Wannawichian Utane Sawangwit |
author_sort |
Anirut Phriksee |
title |
Weak lensing analysis of CODEX clusters using dark energy camera legacy survey: Mass-richness relation |
title_short |
Weak lensing analysis of CODEX clusters using dark energy camera legacy survey: Mass-richness relation |
title_full |
Weak lensing analysis of CODEX clusters using dark energy camera legacy survey: Mass-richness relation |
title_fullStr |
Weak lensing analysis of CODEX clusters using dark energy camera legacy survey: Mass-richness relation |
title_full_unstemmed |
Weak lensing analysis of CODEX clusters using dark energy camera legacy survey: Mass-richness relation |
title_sort |
weak lensing analysis of codex clusters using dark energy camera legacy survey: mass-richness relation |
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2020 |
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https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85079689843&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/68361 |
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