2006MNRAS.371L..60H

Query : 2006MNRAS.371L..60H

2006MNRAS.371L..60H - Mon. Not. R. Astron. Soc., 371, L60-L64 (2006/September-1)

A weak lensing estimate from GEMS of the virial to stellar mass ratio in massive galaxies to z ∼ 0.8.

HEYMANS C., BELL E.F., RIX H.-W., BARDEN M., BORCH A., CALDWELL J.A.R., McINTOSH D.H., MEISENHEIMER K., PENG C.Y., WOLF C., BECKWITH S.V.W., HAUSSLER B., JAHNKE K., JOGEE S., SANCHEZ S.F., SOMERVILLE R. and WISOTZKI L.

Abstract (from CDS):

We present constraints on the evolution of the virial to stellar mass ratio of galaxies with high stellar masses in the redshift range 0.2 < z < 0.8, by comparing weak lensing measurements of virial mass Mvir with estimates of stellar mass Mstar. For a complete sample of galaxies with log(Mstar/M☉) > 10.5, where the majority show an early-type morphology, we find that the virial mass to stellar mass ratio is given by Mvir/Mstar= 53+13–16. Assuming a baryon fraction from the concordance cosmology, this corresponds to a stellar fraction of baryons in massive galaxies of Ω*b/Ωb= 0.10±0.03. Analysing the galaxy sample in different redshift slices, we find little or no evolution in the virial to stellar mass ratio, and place an upper limit of ∼2.5 on the growth of massive galaxies through the conversion of gas into stars from z = 0.8 to the present day.

Abstract Copyright: 2006 The Authors. Journal compilation © 2006 RAS

Journal keyword(s): gravitational lensing - galaxies: evolution - galaxies: general - galaxies: haloes - cosmology: observations

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 NAME Chandra Deep Field-South reg 03 32 28.0 -27 48 30           ~ 2282 1

Query : 2006MNRAS.371L..60H

Basic data :
NAME Chandra Deep Field-South -- Region defined in the Sky
Other object types: otypes_help 		reg ()
ICRS coord. (ep=J2000) : 		03 32 28.0 -27 48 30 [ ] D 2001ApJ...551..624G
FK4 coord. (ep=B1950 eq=1950) : 		03 30 22.4 -27 58 35 [ ]
Gal coord. (ep=J2000) : 		223.5732 -54.4374 [ ]
Angular size (arcmin): 		15.84 15.84 ~ (~) D ~
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Identifiers (4) :
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NAME Chandra Deep Field-South NAME CDFS NAME CDF-S NAME Chandra Deep Field South

References (2282 between 1850 and 2026) (Total 2282)
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