Mass variance from archival X-ray properties of Dark Energy Survey Year-1 galaxy clusters

DES Collaboration

doi:10.1093/mnras/stz2689

Mass variance from archival X-ray properties of Dark Energy Survey Year-1 galaxy clusters

DES Collaboration

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

Using archival X-ray observations and a lognormal population model, we estimate constraints on the intrinsic scatter in halo mass at fixed optical richness for a galaxy cluster sample identified in Dark Energy Survey Year-One (DES-Y1) data with the redMaPPer algorithm. We examine the scaling behaviour of X-ray temperatures, T_X, with optical richness, λ_RM, for clusters in the redshift range 0.2 < z < 0.7. X-ray temperatures are obtained from Chandra and XMM observations for 58 and 110 redMaPPer systems, respectively. Despite non-uniform sky coverage, the T_X measurements are > 50 per cent complete for clusters with λ_RM > 130. Regression analysis on the two samples produces consistent posterior scaling parameters, from which we derive a combined constraint on the residual scatter, σ_ln T | λ = 0.275 ± 0.019. Joined with constraints for T_X scaling with halo mass from the Weighing the Giants program and richness-temperature covariance estimates from the LoCuSS sample, we derive the richness-conditioned scatter in mass, σ_ln M | λ = 0.30 ± 0.04 _(stat) ± 0.09 _(sys), at an optical richness of approximately 100. Uncertainties in external parameters, particularly the slope and variance of the T_X-mass relation and the covariance of T_X and λ_RM at fixed mass, dominate the systematic error. The 95 per cent confidence region from joint sample analysis is relatively broad, σ_ln M | _λ ∈ [0.14, 0.55], or a factor 10 in variance.

Original language	English (US)
Pages (from-to)	3341-3354
Number of pages	14
Journal	Monthly Notices of the Royal Astronomical Society
Volume	490
Issue number	3
DOIs	https://doi.org/10.1093/mnras/stz2689
State	Published - Dec 1 2019

Keywords

Galaxies: clusters: general - X-rays: galaxies: clusters

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1093/mnras/stz2689

Cite this

@article{665403c68f6d46ffb66ae58cde590e92,

title = "Mass variance from archival X-ray properties of Dark Energy Survey Year-1 galaxy clusters",

abstract = "Using archival X-ray observations and a lognormal population model, we estimate constraints on the intrinsic scatter in halo mass at fixed optical richness for a galaxy cluster sample identified in Dark Energy Survey Year-One (DES-Y1) data with the redMaPPer algorithm. We examine the scaling behaviour of X-ray temperatures, TX, with optical richness, λRM, for clusters in the redshift range 0.2 < z < 0.7. X-ray temperatures are obtained from Chandra and XMM observations for 58 and 110 redMaPPer systems, respectively. Despite non-uniform sky coverage, the TX measurements are > 50 per cent complete for clusters with λRM > 130. Regression analysis on the two samples produces consistent posterior scaling parameters, from which we derive a combined constraint on the residual scatter, σln T | λ = 0.275 ± 0.019. Joined with constraints for TX scaling with halo mass from the Weighing the Giants program and richness-temperature covariance estimates from the LoCuSS sample, we derive the richness-conditioned scatter in mass, σln M | λ = 0.30 ± 0.04 (stat) ± 0.09 (sys), at an optical richness of approximately 100. Uncertainties in external parameters, particularly the slope and variance of the TX-mass relation and the covariance of TX and λRM at fixed mass, dominate the systematic error. The 95 per cent confidence region from joint sample analysis is relatively broad, σln M | λ ∈ [0.14, 0.55], or a factor 10 in variance.",

keywords = "Galaxies: clusters: general - X-rays: galaxies: clusters",

author = "{DES Collaboration} and A. Farahi and X. Chen and Evrard, {A. E.} and Hollowood, {D. L.} and R. Wilkinson and S. Bhargava and P. Giles and Romer, {A. K.} and T. Jeltema and M. Hilton and A. Bermeo and J. Mayers and {Vergara Cervantes}, C. and E. Rozo and Rykoff, {E. S.} and C. Collins and M. Costanzi and S. Everett and Liddle, {A. R.} and Mann, {R. G.} and A. Mantz and P. Rooney and M. Sahlen and J. Stott and Viana, {P. T.P.} and Y. Zhang and J. Annis and S. Avila and D. Brooks and E. Buckley-Geer and Burke, {D. L.} and {Carnero Rosell}, A. and {Carrasco Kind}, M. and J. Carretero and Castander, {F. J.} and {da Costa}, {L. N.} and {de Vicente}, J. and S. Desai and Diehl, {H. T.} and Dietrich, {J. P.} and P. Doel and B. Flaugher and P. Fosalba and J. Frieman and J. Garc{\'i}a-Bellido and E. Gaztanaga and Gerdes, {D. W.} and D. Gruen and Gruendl, {R. A.} and E. Krause",

note = "Publisher Copyright: {\textcopyright} 2019 The Author(s)",

year = "2019",

month = dec,

day = "1",

doi = "10.1093/mnras/stz2689",

language = "English (US)",

volume = "490",

pages = "3341--3354",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "3",

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TY - JOUR

T1 - Mass variance from archival X-ray properties of Dark Energy Survey Year-1 galaxy clusters

AU - DES Collaboration

AU - Farahi, A.

AU - Chen, X.

AU - Evrard, A. E.

AU - Hollowood, D. L.

AU - Wilkinson, R.

AU - Bhargava, S.

AU - Giles, P.

AU - Romer, A. K.

AU - Jeltema, T.

AU - Hilton, M.

AU - Bermeo, A.

AU - Mayers, J.

AU - Vergara Cervantes, C.

AU - Rozo, E.

AU - Rykoff, E. S.

AU - Collins, C.

AU - Costanzi, M.

AU - Everett, S.

AU - Liddle, A. R.

AU - Mann, R. G.

AU - Mantz, A.

AU - Rooney, P.

AU - Sahlen, M.

AU - Stott, J.

AU - Viana, P. T.P.

AU - Zhang, Y.

AU - Annis, J.

AU - Avila, S.

AU - Brooks, D.

AU - Buckley-Geer, E.

AU - Burke, D. L.

AU - Carnero Rosell, A.

AU - Carrasco Kind, M.

AU - Carretero, J.

AU - Castander, F. J.

AU - da Costa, L. N.

AU - de Vicente, J.

AU - Desai, S.

AU - Diehl, H. T.

AU - Dietrich, J. P.

AU - Doel, P.

AU - Flaugher, B.

AU - Fosalba, P.

AU - Frieman, J.

AU - García-Bellido, J.

AU - Gaztanaga, E.

AU - Gerdes, D. W.

AU - Gruen, D.

AU - Gruendl, R. A.

AU - Krause, E.

PY - 2019/12/1

Y1 - 2019/12/1

N2 - Using archival X-ray observations and a lognormal population model, we estimate constraints on the intrinsic scatter in halo mass at fixed optical richness for a galaxy cluster sample identified in Dark Energy Survey Year-One (DES-Y1) data with the redMaPPer algorithm. We examine the scaling behaviour of X-ray temperatures, TX, with optical richness, λRM, for clusters in the redshift range 0.2 < z < 0.7. X-ray temperatures are obtained from Chandra and XMM observations for 58 and 110 redMaPPer systems, respectively. Despite non-uniform sky coverage, the TX measurements are > 50 per cent complete for clusters with λRM > 130. Regression analysis on the two samples produces consistent posterior scaling parameters, from which we derive a combined constraint on the residual scatter, σln T | λ = 0.275 ± 0.019. Joined with constraints for TX scaling with halo mass from the Weighing the Giants program and richness-temperature covariance estimates from the LoCuSS sample, we derive the richness-conditioned scatter in mass, σln M | λ = 0.30 ± 0.04 (stat) ± 0.09 (sys), at an optical richness of approximately 100. Uncertainties in external parameters, particularly the slope and variance of the TX-mass relation and the covariance of TX and λRM at fixed mass, dominate the systematic error. The 95 per cent confidence region from joint sample analysis is relatively broad, σln M | λ ∈ [0.14, 0.55], or a factor 10 in variance.

AB - Using archival X-ray observations and a lognormal population model, we estimate constraints on the intrinsic scatter in halo mass at fixed optical richness for a galaxy cluster sample identified in Dark Energy Survey Year-One (DES-Y1) data with the redMaPPer algorithm. We examine the scaling behaviour of X-ray temperatures, TX, with optical richness, λRM, for clusters in the redshift range 0.2 < z < 0.7. X-ray temperatures are obtained from Chandra and XMM observations for 58 and 110 redMaPPer systems, respectively. Despite non-uniform sky coverage, the TX measurements are > 50 per cent complete for clusters with λRM > 130. Regression analysis on the two samples produces consistent posterior scaling parameters, from which we derive a combined constraint on the residual scatter, σln T | λ = 0.275 ± 0.019. Joined with constraints for TX scaling with halo mass from the Weighing the Giants program and richness-temperature covariance estimates from the LoCuSS sample, we derive the richness-conditioned scatter in mass, σln M | λ = 0.30 ± 0.04 (stat) ± 0.09 (sys), at an optical richness of approximately 100. Uncertainties in external parameters, particularly the slope and variance of the TX-mass relation and the covariance of TX and λRM at fixed mass, dominate the systematic error. The 95 per cent confidence region from joint sample analysis is relatively broad, σln M | λ ∈ [0.14, 0.55], or a factor 10 in variance.

KW - Galaxies: clusters: general - X-rays: galaxies: clusters

UR - http://www.scopus.com/inward/record.url?scp=85079654085&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85079654085&partnerID=8YFLogxK

U2 - 10.1093/mnras/stz2689

DO - 10.1093/mnras/stz2689

M3 - Article

AN - SCOPUS:85079654085

SN - 0035-8711

VL - 490

SP - 3341

EP - 3354

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

Mass variance from archival X-ray properties of Dark Energy Survey Year-1 galaxy clusters

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X-ray properties of DES-Y1 galaxy clusters

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Mass variance from archival X-ray properties of Dark Energy Survey Year-1 galaxy clusters

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ASJC Scopus subject areas

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X-ray properties of DES-Y1 galaxy clusters

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