2012ApJ...748..120D

Query : 2012ApJ...748..120D

2012ApJ...748..120D - Astrophys. J., 748, 120 (2012/April-1)

The universal gas mass fraction in clusters of galaxies.

DAVID L.P., JONES C. and FORMAN W.

Abstract (from CDS):

We obtained a deep 150 ks Chandra observation of the optically selected cluster of galaxies, RCS 2318+0034, to investigate the gas mass fraction in this system. Combining our deep Chandra observation with an archival 50 ks observation, we derive gas mass fractions of fgas= 0.06 ±.02 and 0.10 ±.02 within r2500 and r500, respectively. The gas mass fraction in RCS 2318+0034 within r500 is typical of X-ray-selected clusters. Further study shows that the large-scale properties of RCS 2318+0034, including the relations between gas mass, X-ray luminosity, and gas temperature, are also consistent with the observed correlations of X-ray-selected clusters. However, the gas mass fraction within r2500 is less than most X-ray-selected clusters, as previously reported. The deep Chandra image of RCS 2318+0034 shows that this system is currently undergoing a major merger which may have an impact on the inferred gas mass fraction within r2500.

Abstract Copyright: ∼

Journal keyword(s): cosmology: observations - galaxies: clusters: general - X-rays: galaxies: clusters

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 CDGS 50 ClG 23 18 30.670 +00 34 03.03           ~ 19 0

Query : 2012ApJ...748..120D

Basic data :
CDGS 50 -- Cluster of Galaxies
Other object types: otypes_help 		ClG (2015MNRAS,CDGS,...), X (2015MNRAS)
ICRS coord. (ep=J2000) : 		23 18 30.670 +00 34 03.03 [ ] E 2008A&A...483...35S
FK4 coord. (ep=B1950 eq=1950) : 		23 15 56.996 +00 17 38.16 [ ]
Gal coord. (ep=J2000) : 		080.256324 -54.416558 [ ]
Radial velocity / Redshift / cz : 		V(km/s) 155952 [~] / z(~) 0.780 [~] / cz 233838 [~]
   D 2008A&A...483...35S
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Hierarchy : number of linked objects
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: 24 		Display criteria :

Identifiers (5) :
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CDGS 50 RCS J2318.5+0034 RCS J231831+0034.3
RCS J2318+0034 RCS J231831+0034.2

References (19 between 1850 and 2026) (Total 19)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Data at NED - NASA/IPAC Extragalactic Database : CDGS 50

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