J/A+A/693/A2 CHEX-MATE. Dynamical masses (Sereno+, 2025)
CHEX-MATE: Dynamical masses for a sample of 101 Planck Sunyaev-Zeldovich
selected galaxy clusters.
Sereno M., Maurogordato S., Cappi A., Barrena R., Benoist C., Haines P.C.,
Radovich M., Nonino M., Ettori S., Ferragamo A., Gavazzi R., Huot S.,
Pizzuti L., Pratt W.G., Streblyanska A., Zarattini S., Castignani G.,
Eckert D., Gastaldello F., Kay T.S., Lovisari L., Maughan J.B.,
Pointecouteau E., Rasia E., Rossetti M., Sayers J.
<Astron. Astrophys. 693, A2 (2025)>
=2025A&A...693A...2S 2025A&A...693A...2S (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy
Keywords: galaxies: clusters: general - galaxies: kinematics and dynamics -
dark matter
Abstract:
The Cluster HEritage project with XMM-Newton - Mass Assembly and
Thermodynamics at the Endpoint of structure formation (CHEX-MATE) is a
programme to study a minimally-biased sample of 118 galaxy clusters
detected by Planck through the Sunyaev-Zeldovich effect.Accurate and
precise mass measurements are required to exploit CHEX-MATE as an
astrophysical laboratory and a calibration sample for cosmological
probes in the era of large surveys. We measure masses based on the
galaxy dynamics, which are highly complementary to weak-lensing or
X-ray estimates.We analyse the sample under a uniform pipeline, stable
both for poorly-sampled or rich clusters, using spectroscopic
redshifts from public (NED, SDSS, DESI) or private archives, and
dedicated observational programmes. We model the halo mass density and
the anisotropy profile. Membership is confirmed with a cleaning
procedure in phase-space. Mass is derived from measured velocity
dispersion under the assumed model.We measure dynamical masses for 101
CHEX-MATE clusters with at least 10 confirmed members within the
virial radius r_200c. Estimated redshifts and velocity dispersions
agree with literature values when available. Validation with weak-
lensing masses shows agreement within 8±16 (stat.)±5(sys.)%, and
confirms dynamical masses as an unbiased proxy.Comparison with Planck
masses shows them to be biased low by 34±3(stat.)±5(sys.)%. A
follow-up spectroscopic campaign is underway to cover the full
CHEX-MATE sample.
Description:
Based in part on observations collected at ESO under programmes
0110.A-4192 and 0111.1-0186.
Multi-object spectroscopy of scarcely covered clusters was performed
with ESO facilities in 2022-2023 (runs 0110.A-4192 and 0111.1-0186)
with 19.15 nights allocated with EFOSC2 at NTT (New Technology
Telescope), and 13.3 hours with FORS2 at VLT-UT1 (Very Large Telescope
Unit 1) to observe nearby or distant clusters, respectively. Eight
clusters were observed with EFOSC2 at NTT (PSZ2 G263.68-22.55, PSZ2
G346.61+35.06, PSZ2 G266.83+25.08, PSZ2 G340.94+35.07, PSZ2
G325.70+17.34, PSZ2 G062.46-21.35, PSZ2 G106.87-83.23, PSZ2
G259.98-63.43) and 3 clusters with FORS2 at VLT (PSZ2 G243.15-73.84,
PSZ2 G004.45-19.55, and PSZ2 G155.27-68.42).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tableb1.dat 400 104 Dynamical masses of sample
tablec1.dat 35 24 PSZ2 G263.68-22.55
tablec2.dat 35 24 PSZ2 G346.61+35.06
tablec3.dat 35 24 PSZ2 G266.83+25.08
tablec4.dat 35 15 PSZ2 G340.94+35.07
tablec5.dat 35 11 PSZ2 G325.70+17.34
tablec6.dat 35 2 PSZ2 G217.40+10.88
tablec7.dat 35 18 PSZ2 G062.46-21.35
tablec8.dat 35 26 PSZ2 G106.87-83.23
tablec9.dat 35 20 PSZ2 G259.98-63.43
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See also:
J/A+A/678/A181 : CHEX-MATE clusters hydrogen column densities (Bourdin+, 2023)
J/A+A/686/A68 : CHEX-MATE galaxy clusters temperature profiles
(Rossetti+, 2024)
Byte-by-byte Description of file: tableb1.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Index [2/1627] PSZ2 cluster index
6- 23 A18 --- Name PSZ2 cluster name
25- 44 F20.16 deg RAdeg Right ascension (J2000) of the
X-ray peak
46- 65 F20.16 deg DEdeg Declination (J2000) of the X-ray peak
67- 70 I4 --- Ncan [6/1446] Number of initial candidates
72- 74 I3 --- Nmembers [6/778] Number of members used to
compute the velocity dispersion
76- 79 I4 --- N3rMMF3 [6/1133] Number of members within
an aperture of 3*rMMF3
81- 83 I3 --- N200c [6/778] Number of members within r200c
85-103 F19.17 --- z ? Estimated redshift
105-126 F22.20 --- e_z ? Uncertainty on the estimated redshift
128-145 F18.13 km/s sigmaap ? Aperture velocity dispersion
within Rap
147-165 F19.15 km/s e_sigmaap ? Uncertainty on sigmaap
167-184 F18.16 Mpc Rap ? Effective aperture radius
186-203 F18.16 Mpc 1Rmax ? Maximum radius of the member galaxies
205-223 F19.16 10+14Msun Msigma200c ? Dynamical mass within r200c
225-243 F19.16 10+14Msun e_Msigma200c ? Uncenrtainty on Msigma200c
245-263 F19.16 10+14Msun Msigma500c ? Dynamical mass within r500c
265-284 F20.17 10+14Msun e_Msigma500c ? Uncenrtainty on Msigma500c
286-303 F18.16 --- c200c ? Concentration
305-322 F18.16 Mpc r200c ? Overdensity radius
324-341 F18.13 km/s sigmaap200c ? Aperture velocity dispersion
within r200c
343-361 F19.15 km/s e_sigmaap200c ? Uncertainty on sigmaap200c
363-380 F18.13 km/s sigma1D200c ? 1D velocity dispersion within r200c
382-400 F19.15 km/s e_sigma1D200c ? Uncertainty on sigma1D200c
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Byte-by-byte Description of file: tablec?.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right ascension (J2000)
11- 19 F9.5 deg DEdeg Declination (J2000)
21- 26 I6 km/s cz Redshift
28- 30 I3 km/s e_cz Uncertainty on cz
32- 35 F4.1 --- R xcsao reliability of the correlation
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Acknowledgements:
Mauro Sereno, mauro.sereno(at)inaf.it
References:
CHEX-MATE Collaboration, 2021A&A...650A.104C 2021A&A...650A.104C
Campitiello et al., 2022A&A...665A.117C 2022A&A...665A.117C
Oppizzi et al., 2023A&A...672A.156O 2023A&A...672A.156O
Bartalucci et al., 2023A&A...674A.179B 2023A&A...674A.179B
Bourdin et al., 2023A&A...678A.181B 2023A&A...678A.181B, Cat. J/A+A/678/A181
Iqbal et al., 2023A&A...679A..51I 2023A&A...679A..51I
Lovisari et al., 2024A&A...682A..45L 2024A&A...682A..45L
Balboni et al., 2024A&A...686A...5B 2024A&A...686A...5B
Rossetti et al., 2024A&A...686A..68R 2024A&A...686A..68R, Cat. J/A+A/686/A68
Kim et al., 2024A&A...686A..97K 2024A&A...686A..97K
Dupourque et al., 2024A&A...687A..58D 2024A&A...687A..58D
(End) Patricia Vannier [CDS] 21-Oct-2024