J/MNRAS/466/2614 Complex cluster Abell 1758 stars (Monteiro-Oliveira+, 2017)
The merger history of the complex cluster Abell 1758: a combined weak lensing
and spectroscopic view.
Monteiro-Oliveira R., Cypriano E.S., Machado R.E.G., Lima Neto G.B.,
Ribeiro A.L.B., Sodre L., Dupke R.
<Mon. Not. R. Astron. Soc., 466, 2614-2632 (2017)>
=2017MNRAS.466.2614M 2017MNRAS.466.2614M (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Photometry ; Radial velocities
Keywords: gravitational lensing: weak - galaxies: clusters: individual: A1758 -
dark matter - large-scale structure of Universe
Abstract:
We present a weak-lensing and dynamical study of the complex cluster
Abell 1758 (A1758, {bar}z=0.278) supported by hydrodynamical
simulations. This cluster is composed of two main structures called
A1758N and A1758S. The northern structure is composed of A1758NW and
A1758NE, with lensing determined masses of
7.90-1.55+1.89x1014M☉ and
5.49-1.33+1.67x1014M☉, respectively. They show a
remarkable feature: while in A1758NW, there is a spatial agreement
among weak-lensing mass distribution, intracluster medium and its
brightest cluster galaxy (BCG), in A1758NE, the X-ray peak is located
96-15+14 arcsec away from the mass peak and BCG positions. Given
the detachment between gas and mass, we could use the local surface
mass density to estimate an upper limit for the dark matter
self-interaction cross-section: σ/m<5.83cm2/g. Combining our
velocity data with hydrodynamical simulations, we have shown that
A1758 NW and NE had their closest approach 0.27Gyr ago and their
merger axis is 21±12° from the plane of the sky. In the A1758S
system, we have measured a total mass of
4.96-1.19+1.08x1014M☉ and, using radial velocity data, we
found that the main merger axis is located at 70±4° from the
plane of the sky, therefore closest to the line of sight.
Description:
Imaging data were taken with the Suprime-Cam of the Subaru telescope
during semester 2007A in queue mode. The observations have been done
in the B, RC and z' bands.
Spectroscopic observations were done in 2010A with the Gemini
Multi-Object Spectrograph (GMOS) mounted on the Gemini North
telescope.
Our final catalogue of A1758N field (see Table A1) has 203 galaxies:
70 are new measurements presented by us here, 73 by Boschin et al.
(2012, Cat. J/A+A/540/A43), plus 60 from both catalogues with
consistent measurements. For the A1758S field (see Table B1), we
present 35 new redshifts.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 65 203 Catalogue of the heliocentric radial velocities
in A1758N field
tableb1.dat 58 34 Velocity catalogue of A1758S
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See also:
J/A+A/540/A43 : New redshifts for Abell 1758N galaxies (Boschin+, 2012)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- ID [1/203] Galaxy ID
4 A1 --- n_ID [*] Note on ID (1)
6- 8 I3 --- IDm ?=- Galaxy membership ID
10- 12 I3 --- IDb ?=- ID adopted by Boschin et al. (2012, Cat.
J/A+A/540/A43), [BGB2012] NNN in Simbad
14- 15 I2 h RAh Right ascension (J2000)
17- 18 I2 min RAm Right ascension (J2000)
20- 23 F4.1 s RAs Right ascension (J2000)
25 A1 --- DE- Declination sign (J2000)
26- 27 I2 deg DEd Declination (J2000)
29- 30 I2 arcmin DEm Declination (J2000)
32- 35 F4.1 arcsec DEs Declination (J2000)
37- 41 F5.2 mag Bmag B magnitude
43- 47 F5.2 mag RCmag Cousins R magnitude
49- 53 F5.2 mag z'mag z' magnitude
55- 60 I6 km/s HRV Heliocentric radial velocity
62- 65 I4 km/s e_HRV rms uncertainty on heliocentric radial velocity
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Note (1): ID 89 is A1758NW BGC, and ID 113 is A1758NE BGC.
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Byte-by-byte Description of file: tableb1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
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1- 2 I2 --- ID [1/35] Galaxy ID
3 A1 --- n_ID [*] Note on ID (1)
5- 6 I2 --- IDm ?=- Galaxy membership ID
8- 9 I2 h RAh Right ascension (J2000)
11- 12 I2 min RAm Right ascension (J2000)
14- 17 F4.1 s RAs Right ascension (J2000)
19 A1 --- DE- Declination sign (J2000)
20- 21 I2 deg DEd Declination (J2000)
23- 24 I2 arcmin DEm Declination (J2000)
26- 29 F4.1 arcsec DEs Declination (J2000)
31- 35 F5.2 mag Bmag B magnitude
37- 41 F5.2 mag RCmag Cousins R magnitude
43- 47 F5.2 mag z'mag z' magnitude
49- 54 I6 km/s HRV Heliocentric radial velocity
56- 58 I3 km/s e_HRV rms uncertainty on heliocentric radial velocity
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Note (1): * for southern BGC.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 17-Oct-2019