J/ApJ/896/70 Radial acceleration relation in CLASH galaxy clusters (Tian+, 2020)
The radial acceleration relation in CLASH galaxy clusters.
Tian Y., Umetsu K., Ko C.-M., Donahue M., Chiu I.-N.
<Astrophys. J., 896, 70 (2020)>
=2020ApJ...896...70T 2020ApJ...896...70T
ADC_Keywords: Clusters, galaxy; Intergalactic medium; Redshifts; X-ray sources;
Gravitational lensing
Keywords: Galaxy clusters ; Intracluster medium ; Gravitational lensing ;
Dark matter ; Cosmology ; X-ray astronomy
Abstract:
The radial acceleration relation (RAR) in galaxies describes a tight
empirical scaling law between the total acceleration
gtot(r)=GMtot(<r)/r2 observed in galaxies and that expected from
their baryonic mass gbar(r)=GMbar(<r)/r2, with a characteristic
acceleration scale of g†∼1.2x10-10m/s2. Here, we examine
if such a correlation exists in galaxy clusters using weak-lensing,
strong-lensing, and X-ray data sets available for 20 high-mass
clusters targeted by the Cluster Lensing And Supernova survey with
Hubble (CLASH). By combining our CLASH data with stellar mass
estimates for the brightest cluster galaxies (BCGs) and accounting for
the stellar baryonic component in clusters, we determine, for the
first time, an RAR on BCG-cluster scales. The resulting RAR is well
described by a tight power-law relation,
gtot∝gbar0.51-0.05+0.04, with lognormal intrinsic
scatter of 14.7-2.8+2.9%. The slope is consistent with the low
acceleration limit of the RAR in galaxies,
gtot=(g†,gbar)0.5, whereas the intercept implies a much
higher acceleration scale of g†=(2.02±0.11)x10-9m/s2,
indicating that there is no universal RAR that holds on all scales
from galaxies to clusters. We find that the observed RAR in CLASH
clusters is consistent with predictions from a semianalytical model
developed in the standard ΛCDM framework. Our results also
predict the presence of a baryonic Faber-Jackson relation
(σv4^∝Mbar) on cluster scales.
Description:
We analyze multiwavelength data products from the Cluster Lensing And
Supernova survey with Hubble (CLASH; Postman+ 2012, J/ApJS/199/25).
The CLASH survey is a 524-orbit Hubble Space Telescope (HST)
Multi-Cycle Treasury program designed to probe the mass distribution
of 25 high-mass galaxy clusters with M500≳4x1014M☉. In this
sample, 20 clusters were X-ray selected to be hot (TX>5keV) and to
have a regular X-ray morphology.
So, we focus on a subset of 20 CLASH clusters taken from
Umetsu+ (2016ApJ...821..116U 2016ApJ...821..116U), who presented a joint analysis of
strong-lensing, weak-lensing shear, and magnification data of these
individual clusters.
Throughout this paper, we assume a flat ΛCDM cosmology with
Ωm=0.27, ΩΛ=0.73, and a Hubble constant of
H0=100h.km/s/Mpc with h=0.7.
We define the gravitational acceleration in the framework of Newtonian
dynamics as g(r)=GM(<r)/r2.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 111 20 Properties of the central brightest cluster
galaxies (BCGs) in the CLASH sample
fig2.dat 42 84 Radial acceleration relation (RAR) in
20 CLASH galaxy clusters
--------------------------------------------------------------------------------
See also:
B/hst : HST Archived Exposures Catalog (STScI, 2007)
J/ApJS/199/25 : CLASH sources for MACS1149.6+2223 (Postman+, 2012)
J/ApJ/749/97 : Multiple lensed images in MCS J1206.2-0847 (Zitrin+, 2012)
J/ApJ/757/22 : Strong and weak lensing analysis of A2261 (Coe+, 2012)
J/ApJ/762/L30 : CLASH: MCS J0416.1-2403 strong lensing analysis (Zitrin+, 2013)
J/ApJS/216/27 : Galaxy clusters discovered in the SPT-SZ survey (Bleem+, 2015)
J/ApJ/801/44 : HST lensing analysis of the CLASH sample (Zitrin+, 2015)
J/ApJ/817/85 : Properties of giant arcs behind CLASH clusters (Xu+, 2016)
J/ApJS/224/33 : CLASH-VLT: the FF cluster MACS J0416.1-2403 (Balestra+, 2016)
J/AJ/152/157 : Mass models for 175 disk galaxies with SPARC (Lelli+, 2016)
J/ApJ/848/37 : HST UV-IR photometry in CLASH galaxy clusters (Connor+, 2017)
J/A+A/632/A36 : Strong lensing models of 8 CLASH clusters (Caminha+, 2019)
J/A+A/640/A65 : CLASH brightest cluster galaxies CO spectra (Castignani+, 2020)
J/ApJ/890/148 : Concentration-mass relation for XXL clusters (Umetsu+, 2020)
http://archive.stsci.edu/prepds/clash/ : CLASH home page
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 17 A17 --- Name Cluster name
19- 23 F5.3 --- z [0.18/0.7] Cluster redshift
25- 26 I2 h RAh Hour of right ascension (J2000)
28- 29 I2 min RAm Minute of right ascension (J2000)
31- 35 F5.2 s RAs Second of right ascension (J2000)
37 A1 --- DE- Sign of declination (J2000)
38- 39 I2 deg DEd Degree of declination (J2000)
41- 42 I2 arcmin DEm Arcminute of declination (J2000)
44- 48 F5.2 arcsec DEs Arcsecond of declination (J2000)
50- 54 A5 --- Band HST band corresponding to the rest-frame
wavelength of 1um
56- 59 F4.2 --- n [1.44/3.83] Sersic index of the BCG obtained
with GALFIT in the HST band corresponding to
the rest-frame wavelength of 1um
61- 64 F4.1 kpc Re [13.2/56.9] Effective radius of the BCG obtained
with GALFIT in the HST band corresponding to
the rest-frame wavelength of 1um
66- 69 F4.2 kpc e_Re [0.04/0.93] Re uncertainty
71- 74 F4.1 kpc Rad [14.3/30.3] BCG centric radius (r) for M*, Mgas,
and Mtot estimates
76- 80 F5.2 10+11Msun M* [2.19/14.7] BCG total stellar mass (1)
82- 86 F5.2 10+11Msun Mgas [0.48/13.1]? X-ray gas mass Mgas(<Rad) from
Donahue+ (2014ApJ...794..136D 2014ApJ...794..136D)
88- 91 F4.2 10+11Msun e_Mgas [0.02/0.55]? Mgas uncertainty
93- 97 F5.2 10+11Msun Mtot [3.87/25.3] Lensing mass Mtot(<Rad) from
Umetsu+ (2016ApJ...821..116U 2016ApJ...821..116U)
99-102 F4.2 10+11Msun e_Mtot [0.73/6.5] Mtot uncertainty
104-111 A8 --- AName Abbreviated cluster name as used in Fig 2;
column added by CDS
--------------------------------------------------------------------------------
Note (1): BCG total stellar mass M*(<Rad) estimated by
Cooke+ (2016ApJ...833..224C 2016ApJ...833..224C). We assume a fractional uncertainty of
10% in our analysis.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: fig2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- AName Abbreviated cluster name
10- 14 F5.1 kpc Rad [14.3/600] Spherical radius (r)
16- 22 F7.3 [m/s2] log(gbar) [-10.9/-9.6] Log baryonic mass acceleration,
gbar(r)
24- 30 F7.3 [m/s2] log(gtot) [-10.02/-9.1] Log total acceleration,
gtot(r)
32- 36 F5.3 [m/s2] e_log(gbar) [0.001/0.05] Standard error in log(gbar)
38- 42 F5.3 [m/s2] e_log(gtot) [0.04/0.3] Standard error in log(gtot)
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 20-Oct-2021