J/A+A/597/A24 Probing the dynamical of Abell S1101 (Rabitz+, 2017)
Probing the dynamical and X-ray mass proxies of the cluster of galaxies
Abell S1101.
Rabitz A., Zhang Y.-Y., Schwope A., Verdugo M., Reiprich T., Klein M.
<Astron. Astrophys. 597, A24 (2017)>
=2017A&A...597A..24R 2017A&A...597A..24R (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; X-ray sources ; Redshifts ; Magnitudes
Keywords: galaxies: clusters: individual: Abell S1101 -
cosmology: observations - X-rays: galaxies: clusters -
galaxies: clusters: intracluster medium -
galaxies: kinematics and dynamics - methods: data analysis
Abstract:
The galaxy cluster Abell S1101 (S1101 hereafter) deviates
significantly from the X-ray luminosity versus velocity dispersion
relation (L-sigma) of galaxy clusters in our previous study. Given
reliable X-ray luminosity measurement combining XMM-Newton and ROSAT,
this could most likely be caused by the bias in the velocity
dispersion due to interlopers and low member statistic in the previous
sample of member galaxies, which was solely based on 20 galaxy
redshifts drawn from the literature.
We intend to increase the galaxy member statistic to perform a
precision measurement of the velocity dispersion and dynamical mass of
S1101. We aim for a detailed substructure and dynamical state
characterization of this cluster, and a comparison of mass estimates
derived from (i) the velocity dispersion (Mvir), (ii) the caustic
mass computation (Mcaustic), and (iii) mass proxies from X-ray
observations and the Sunyaev- Zeldovich (SZ) effect.
We carried out new optical spectroscopic observations of the galaxies
in this cluster field with VIMOS, obtaining a sample of ∼60 member
galaxies for S1101. We revised the cluster redshift and velocity
dispersion measurements based on this sample and also applied the
Dressler-Shectman substructure test.
The completeness of cluster members within r200 was significantly
improved for this cluster. Tests for dynamical substructure did not
show evidence for major disturbances or merging activities in S1101.
We find good agreement between the dynamical cluster mass measurements
and X-ray mass estimates which confirms the relaxed state of the
cluster displayed in the 2D substructure test. The SZ mass proxy is
slightly higher than the other estimates. The updated measurement of
the velocity dispersion erased the deviation of S1101 in the L-sigma
relation.
Description:
Positions and redshift of our spectroscopic data of the field of S1101
are presented. The object positions are based on GSC2.3 astrometry. We
give R-band magnitudes (Vega system) for those galaxies within our
VIMOS pre- imaging in file S1101pre.dat. A decision between passive or
active galaxy and star is made based on our spectra, which were
observed with VIMOS and HR-blue grism. For more details on the setup,
reduction and analysis, we refer to the paper.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablec1.dat 39 376 Spectroscopic sources within the VIMOS
pre-imaging field
tableb1.dat 43 58 VIMOS and literature cluster galaxies of S1101
tablea1.dat 32 53 Sources associated as group members of LCLG-42230
based on our VIMOS spectroscopic data only
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Byte-by-byte Description of file: tablec1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 h RAh Right ascension (J2000.0)
4- 5 I2 min RAm Right ascension (J2000.0)
7- 10 F4.1 s RAs Right ascension (J2000.0)
12 A1 --- DE- Declination sign (J2000.0)
13- 14 I2 deg DEd Declination (J2000.0)
16- 17 I2 arcmin DEm Declination (J2000.0)
19- 20 I2 arcsec DEs Declination (J2000.0)
23- 28 F6.4 --- z Redshift
31- 36 F6.3 mag Rmag R-band magnitude
39 I1 --- Type [0/9] Type (G1)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tableb1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 h RAh Right ascension (J2000.0)
4- 5 I2 min RAm Right ascension (J2000.0)
7- 10 F4.1 s RAs Right ascension (J2000.0)
12 A1 --- DE- Declination sign (J2000.0)
13- 14 I2 deg DEd Declination (J2000.0)
16- 17 I2 arcmin DEm Declination (J2000.0)
19- 20 I2 arcsec DEs Declination (J2000.0)
23- 29 F7.5 --- z Redshift
32 I1 --- Type [0/9] Type (G1)
35- 40 F6.3 mag Rmag ?=99.999 R-band magnitude
(99.999: no imaging data)
43 A1 --- r_z Reference for the redshift (2)
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Note (2): References as follows:
A = this work
B = Jones et al., 2009MNRAS.399..683J 2009MNRAS.399..683J
C = Shectman et al., 1996ApJ...470..172S 1996ApJ...470..172S, Cat. VII/203
D = Zabludoff et al., 1998, Cat. J/ApJ/496/39
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Byte-by-byte Description of file: tablea1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 h RAh Right ascension (J2000.0)
4- 5 I2 min RAm Right ascension (J2000.0)
7- 10 F4.1 s RAs Right ascension (J2000.0)
12 A1 --- DE- Declination sign (J2000.0)
13- 14 I2 deg DEd Declination (J2000.0)
16- 17 I2 arcmin DEm Declination (J2000.0)
19- 20 I2 arcsec DEs Declination (J2000.0)
23- 28 F6.4 --- z Redshift
31- 32 A2 --- Sample [S1 S2] Sample (4)
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Note (4): Sample as follows:
S1= initial sample (wide z-range)
S2= selected group members
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Global notes:
Note (G1): Type as follows:
0 = passive galaxy
1 = active galaxy
2 = star
9 = poor spectrum / no spectrum
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Acknowledgements:
Andreas Rabitz, arabitz(at)aip.de
Leibniz-Institut fur Astrophysik, Potsdam
(End) Andreas Rabitz [Leibniz-Inst., Potsdam] Patricia Vannier [CDS] 14-Oct-2016