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A&A 374, 28-35 (2001)
DOI: 10.1051/0004-6361:20010616
ASCA observations of massive medium-distant clusters of galaxies. II.
H. Matsumoto1, M. Pierre2, T. G. Tsuru3 and D. S. Davis11 Center for Space Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, NE80, Cambridge, MA 02139-4307, USA
2 CEA/DSM/DAPNIA, Service d'Astrophysique, 91191 Gif-sur-Yvette, France
3 Department of Physics, Faculty of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
(Received 25 August 2000 / Accepted 27 April 2001 )
Abstract
We have selected seven medium-distant clusters of galaxies
(
-0.3) for multi-wavelength observations with
the goal of investigating their dynamical state. Following
Paper I (Pierre et al. 1999) which reported the
ASCA results about two of them, we present here the analysis
of the ASCA observations of the other five clusters;
RX J1023.8-2715
(
A 3444
),
RX J1031.6-2607
,
RX J1050.5-0236
(
A 1111
),
RX J1203.2-2131
(
A 1451
), and
RX J1314.5-2517
. Except for
RX J1031.6, whose X-ray emission turned out to be dominated
by an AGN, the ASCA spectra are well fitted by a
one-temperature thin thermal plasma model. We compare the
temperature-luminosity relation of our clusters with that of
nearby ones (z< 0.1). Two clusters, RX J1050.5 and
RX J1023.8, show larger luminosities than the bulk of
clusters at similar temperatures, which suggests the
presence of a cooling flow. The temperature vs.
iron-abundance relationship of our sample is consistent with
that of nearby clusters.
Key words: galaxies: clusters: general -- cosmology: observations -- X-rays: galaxies
Offprint request: H. Matsumoto, matumoto@space.mit.edu
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