Dark Energy Survey Year 1 results: the effect of intracluster light on photometric redshifts for weak gravitational lensing

DES Collaboration; S. Avila; E. Gaztanaga; D. Thomas

doi:10.1093/mnras/stz2036

Dark Energy Survey Year 1 results: the effect of intracluster light on photometric redshifts for weak gravitational lensing

DES Collaboration, S. Avila, E. Gaztanaga, D. Thomas

Institute of Cosmology & Gravitation

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Abstract

We study the effect of diffuse intracluster light on the critical surface mass density estimated from photometric redshifts of lensing source galaxies, and the resulting bias in a weak lensing measurement of galaxy cluster mass. Under conservative assumptions, we find the bias to be negligible for imaging surveys like the Dark Energy Survey with a recommended scale cut of ≥200 kpc distance from cluster centres. For significantly deeper lensing source galaxy catalogues from present and future surveys like the Large Synoptic Survey Telescope program, more conservative scale and source magnitude cuts or a correction of the effect may be necessary to achieve percent level lensing measurement accuracy, especially at the massive end of the cluster population.

Original language	English
Pages (from-to)	4389-4399
Number of pages	11
Journal	Monthly Notices of the Royal Astronomical Society
Volume	488
Issue number	3
Early online date	27 Jul 2019
DOIs	https://doi.org/10.1093/mnras/stz2036
Publication status	Published - 1 Sept 2019

Keywords

cosmology: observations
galaxies: clusters: general
galaxies: distances and redshifts
gravitational lensing: weak
UKRI
STFC

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10.1093/mnras/stz2036

stz2036
This article has been accepted for publication in MNRAS ©: 2019 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
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title = "Dark Energy Survey Year 1 results: the effect of intracluster light on photometric redshifts for weak gravitational lensing",

abstract = "We study the effect of diffuse intracluster light on the critical surface mass density estimated from photometric redshifts of lensing source galaxies, and the resulting bias in a weak lensing measurement of galaxy cluster mass. Under conservative assumptions, we find the bias to be negligible for imaging surveys like the Dark Energy Survey with a recommended scale cut of ≥200 kpc distance from cluster centres. For significantly deeper lensing source galaxy catalogues from present and future surveys like the Large Synoptic Survey Telescope program, more conservative scale and source magnitude cuts or a correction of the effect may be necessary to achieve percent level lensing measurement accuracy, especially at the massive end of the cluster population.",

keywords = "cosmology: observations, galaxies: clusters: general, galaxies: distances and redshifts, gravitational lensing: weak, UKRI, STFC",

author = "{DES Collaboration} and D. Gruen and Y. Zhang and A. Palmese and B. Yanny and V. Busti and B. Hoyle and P. Melchior and Miller, {C. J.} and E. Rozo and Rykoff, {E. S.} and Varga, {T. N.} and Abdalla, {F. B.} and S. Allam and J. Annis and S. Avila and D. Brooks and Burke, {D. L.} and Rosell, {A. Carnero} and Kind, {M. Carrasco} and J. Carretero and R. Cawthon and M. Crocce and Cunha, {C. E.} and {da Costa}, {L. N.} and C. Davis and {de Vicente}, J. and S. Desai and Diehl, {H. T.} and Dietrich, {J. P.} and A. Drlica-Wagner and B. Flaugher and P. Fosalba and J. Frieman and J. Garc{\'i}a-Bellido and E. Gaztanaga and Gerdes, {D. W.} and Gruendl, {R. A.} and J. Gschwend and Hollowood, {D. L.} and K. Honscheid and James, {D. J.} and T. Jeltema and E. Krause and R. Kron and K. Kuehn and N. Kuropatkin and Marshall, {J. L.} and M. Smith and D. Thomas and Walker, {A. R.}",

year = "2019",

month = sep,

day = "1",

doi = "10.1093/mnras/stz2036",

language = "English",

volume = "488",

pages = "4389--4399",

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

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T1 - Dark Energy Survey Year 1 results

T2 - the effect of intracluster light on photometric redshifts for weak gravitational lensing

AU - DES Collaboration

AU - Gruen, D.

AU - Zhang, Y.

AU - Palmese, A.

AU - Yanny, B.

AU - Busti, V.

AU - Hoyle, B.

AU - Melchior, P.

AU - Miller, C. J.

AU - Rozo, E.

AU - Rykoff, E. S.

AU - Varga, T. N.

AU - Abdalla, F. B.

AU - Allam, S.

AU - Annis, J.

AU - Avila, S.

AU - Brooks, D.

AU - Burke, D. L.

AU - Rosell, A. Carnero

AU - Kind, M. Carrasco

AU - Carretero, J.

AU - Cawthon, R.

AU - Crocce, M.

AU - Cunha, C. E.

AU - da Costa, L. N.

AU - Davis, C.

AU - de Vicente, J.

AU - Desai, S.

AU - Diehl, H. T.

AU - Dietrich, J. P.

AU - Drlica-Wagner, A.

AU - Flaugher, B.

AU - Fosalba, P.

AU - Frieman, J.

AU - García-Bellido, J.

AU - Gaztanaga, E.

AU - Gerdes, D. W.

AU - Gruendl, R. A.

AU - Gschwend, J.

AU - Hollowood, D. L.

AU - Honscheid, K.

AU - James, D. J.

AU - Jeltema, T.

AU - Krause, E.

AU - Kron, R.

AU - Kuehn, K.

AU - Kuropatkin, N.

AU - Marshall, J. L.

AU - Smith, M.

AU - Thomas, D.

AU - Walker, A. R.

PY - 2019/9/1

Y1 - 2019/9/1

N2 - We study the effect of diffuse intracluster light on the critical surface mass density estimated from photometric redshifts of lensing source galaxies, and the resulting bias in a weak lensing measurement of galaxy cluster mass. Under conservative assumptions, we find the bias to be negligible for imaging surveys like the Dark Energy Survey with a recommended scale cut of ≥200 kpc distance from cluster centres. For significantly deeper lensing source galaxy catalogues from present and future surveys like the Large Synoptic Survey Telescope program, more conservative scale and source magnitude cuts or a correction of the effect may be necessary to achieve percent level lensing measurement accuracy, especially at the massive end of the cluster population.

AB - We study the effect of diffuse intracluster light on the critical surface mass density estimated from photometric redshifts of lensing source galaxies, and the resulting bias in a weak lensing measurement of galaxy cluster mass. Under conservative assumptions, we find the bias to be negligible for imaging surveys like the Dark Energy Survey with a recommended scale cut of ≥200 kpc distance from cluster centres. For significantly deeper lensing source galaxy catalogues from present and future surveys like the Large Synoptic Survey Telescope program, more conservative scale and source magnitude cuts or a correction of the effect may be necessary to achieve percent level lensing measurement accuracy, especially at the massive end of the cluster population.

KW - cosmology: observations

KW - galaxies: clusters: general

KW - galaxies: distances and redshifts

KW - gravitational lensing: weak

KW - UKRI

KW - STFC

UR - http://www.scopus.com/inward/record.url?scp=85075170039&partnerID=8YFLogxK

U2 - 10.1093/mnras/stz2036

DO - 10.1093/mnras/stz2036

M3 - Article

AN - SCOPUS:85075170039

SN - 0035-8711

VL - 488

SP - 4389

EP - 4399

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

Dark Energy Survey Year 1 results: the effect of intracluster light on photometric redshifts for weak gravitational lensing

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Keywords

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