For refcode 2008ApJ...672.1293H: Retrieve 14 NED objects in this reference. Please click here for ADS abstract
NED Abstract
Copyright by American Astronomical Society.
Reproduced by permission
2008ApJ...672.1293H
Erratum: "Multiwavelength Mass Comparisons of the z ~ 0.3 CNOC Cluster
Sample" (ApJ, 652, 232 [2006])
Hicks, A. K.; Ellingson, E.; Hoekstra, H.; Yee, H. K. C.
Abstract. In our original paper there was a miscalculation in the
determination of central gas densities for that sample, which we correct
here. We also report a processing error in the exposure map for MS
1512.4+3647 and supply a correction factor for its surface brightness
normalization and background.
The code which was used to determine cluster central densities contained
an error such that it did not account for a (1+z)^3^ cosmological
dimming factor, derived from a combination of cosmological distance and
time dilation corrections. Subsequently, all central densities, gas
masses, and gas mass fractions reported in the paper should be scaled up
by a factor of (1+z)^3/2^.
An error also occurred in the production of the exposure map for MS
1512.4+3647, which caused the bestfit surface brightness normalization
and background for that cluster to be reduced by a factor of 8 (all
other {beta}model values remain unaffected). Therefore, the SB
normalization and background of MS 1512.4+3647 should be multiplied by
this factor, while its central gas density, gas mass, and gas mass
fraction should be multiplied by sqrt(8) (in addition to the
cosmological factor mentioned above).
Table A1 contains updated values for central densities, gas masses, and
gas mass fractions, along with 90% confidence intervals. Using these
values, we obtain a weighted mean gas mass fraction for the sample,
f_gas_(R_200_)=0.136+/0.004h^3/2^_70_, resulting in
{OMEGA}_m_=0.28+/0.01, a value consistent with WMAP 3 year results (D. N.
Spergel et al., ApJ, 652, 232 [2006]).
We emphasize that these corrections do not otherwise affect our results.
In particular, our main conclusion remains valid, e.g., our finding that
there is very good agreement between Xray, dynamical, and weaklensing
cluster mass estimation methods.
Retrieve 14 NED objects in this reference. Please click here for ADS abstract
