J/MNRAS/490/3341 X-ray properties of DES-Y1 galaxy clusters (Farahi+, 2019)
Mass variance from archival X-ray properties of Dark Energy Survey Year-1
galaxy clusters.
Farahi A., Chen X., Evrard A.E., Hollowood D.L., Wilkinson R., Bhargava S.,
Giles P., Romer A.K., Jeltema T., Hilton M., Bermeo A., Mayers J.,
Vergara Cervantes C., Rozo E., Rykoff E.S., Collins C., Costanzi M.,
Everett S., Liddle A.R., Mann R.G., Mantz A., Rooney P., Sahlen M.,
Stott J., Viana P.T.P., Zhang Y., Annis J., Avila S., Brooks D.,
Buckley-Geer E., Burke D.L., Carnero Rosell A., Carrasco Kind M.,
Carretero J., Castander F.J., da Costa L.N., De Vicente J., Desai S.,
Diehl H.T., Dietrich J.P., Doel P., Flaugher B., Fosalba P., Frieman J.,
Garcia-Bellido J., Gaztanaga E., Gerdes D.W., Gruen D., Gruendl R.A.,
Gschwend J., Gutierrez G., Honscheid K., James D.J., Krause E., Kuehn K.,
Kuropatkin N., Lima M., Maia M.A.G., Marshall J.L., Melchior P.,
Menanteau F., Miquel R., Ogando R.L.C., Plazas A.A., Sanchez E.,
Scarpine V., Schubnell M., Serrano S., Sevilla-Noarbe I., Smith M.,
Sobreira F., Suchyta E., Swanson M.E.C., Tarle G., Thomas D., Tucker D.L.,
Vikram V., Walker A.R., Weller J., (the DES Collaboration)
<Mon. Not. R. Astron. Soc., 490, 3341-3354 (2019)>
=2019MNRAS.490.3341F 2019MNRAS.490.3341F (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; X-ray sources ; Redshifts ;
Cross identifications
Keywords: galaxies: clusters: general - X-rays: galaxies: 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,
σlnT|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,
σlnM|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, σlnM|λ∈[0.14,0.55], or
a factor 10 in variance.
Description:
This work is based on data obtained during the DES-Y1 observational
season, between 2013 August 31 and 2014 February 9 (Drlica-Wagner et
al. 2018ApJS..235...33D 2018ApJS..235...33D).
We employ a volume-limited sample of galaxy clusters detected in the
DES-Y1 photometric data using version 6.4.17 of the redMaPPer
cluster-finding algorithm (Rykoff et al. 2016ApJS..224....1R 2016ApJS..224....1R, Cat.
J/ApJS/224/1). The redMaPPer algorithm identifies clusters of
red-sequence galaxies in the multidimensional space of four-band
magnitudes and sky position.
Starting from the volume-limited, λ≥20 redMaPPer catalogue, we
analyse all archival Chandra (Evans et al. 2010ApJS..189...37E 2010ApJS..189...37E, Cat.
IX/45, IX/57) data, which overlapped redMaPPer cluster positions.
After standard data reduction and cleaning, we search for a
significant X-ray cluster detection starting from the redMaPPer
position and iteratively re-centring towards the X-ray peak using an
initial 500kpc aperture. If the cluster is X-ray detected (SNR>5), a
spectrum is extracted, and we attempt to fit for the X-ray
temperature, TX.
For the the XMM-redMaPPer analysis (Giles et al. in preparation), the
redMaPPer sample is matched to all XMM ObsIDs (with useable EPIC
science data) under the requirement that the redMaPPer position be
within 13arcmin of the aim point of the ObsID. Next, the XMM
observations were filtered based upon exposure time. X-ray sources for
each ObsID were then detected using the XCS Automated Pipeline
Algorithm (XAPA; Lloyd-Davies et al. 2011MNRAS.418...14L 2011MNRAS.418...14L). The
luminosities and temperatures for the XMM-redMaPPer sample are derived
using the XCS Post Processing Pipeline, with updates presented in
Giles et al. (in preparation).
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
tablea1.dat 102 74 Chandra clusters
tablea2.dat 77 107 XMM clusters
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See also:
II/357 : The Dark Energy Survey (DES): Data Release 1 (Abbott+, 2018)
J/ApJS/224/1 : redMaPPer cluster catalog from DES data (Rykoff+, 2016)
IX/57 : The Chandra Source Catalog (CSC), Release 2.0 (Evans+, 2019)
Byte-by-byte Description of file: tablea1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- ID [2/6206] redMaPPer Cluser Identification
Number (G1)
6- 10 F5.3 --- z Cluster redshift
12- 17 F6.2 --- lambdac Original redMaPPer optical richness
19- 22 F4.2 --- e_lambdac Error on lambdac
24- 29 F6.2 --- lambdacXr New richness assigned to each cluster at the
location of the X-ray emission peak
31- 35 F5.2 --- e_lambdacXr Error on lambdacXr
37- 41 F5.2 keV kTX ?=-1 Gas temperature
43- 47 F5.2 keV E_kTX ?=-1 Upper error on kTX
49- 53 F5.2 keV e_kTX ?=-1 Lower error on kTX
55-102 A48 --- Obsid Chandra ObsIDs of matching clusters
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Byte-by-byte Description of file: tablea2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- ID [1/23130] redMaPPer Cluser Identification
Number (G1)
7- 11 F5.3 --- z Cluster redshift
13- 18 F6.2 --- lambdac Original redMaPPer optical richness
20- 23 F4.2 --- e_lambdac Error on lambdac
25- 30 F6.2 --- lambdacXr New richness assigned to each cluster at the
location of the X-ray emission peak
32- 36 F5.2 --- e_lambdacXr Error on lambdacXr
38- 42 F5.2 keV kTX Gas temperature
44- 47 F4.2 keV E_kTX Upper error on kTX
49- 52 F4.2 keV e_kTX Lower error on kTX
54- 77 A24 --- XCS XCS unique source identifier
(XMMXCSJHHMMSS.s-DDMMSS.s) which could be
used to match with the XCS source catalogue
(Giles et al. in preparation)
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Global Notes:
Note (G1): This is the redMaPPer Cluster Identification Number that shall be
used to match the X-ray clusters to the original redMaPPer clusters
(McClintock et al. 2019MNRAS.482.1352M 2019MNRAS.482.1352M)
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History:
From electronic version of the journal
(End) Ana Fiallos [CDS] 01-Feb-2023