2002ApJ...578..833Y

Query : 2002ApJ...578..833Y

2002ApJ...578..833Y - Astrophys. J., 578, 833-841 (2002/October-3)

Chandra observation of the central galaxies in the A1060 cluster of galaxies.

YAMASAKI N.Y., OHASHI T. and FURUSHO T.

Abstract (from CDS):

A Chandra observation of the central region of the A1060 cluster of galaxies resolved X-ray emission from two giant elliptical galaxies, NGC 3311 and NGC 3309. The emission from these galaxies consists of two components, namely, the hot interstellar medium (ISM) and the low-mass X-ray binaries (LMXBs). We found that the spatial extent of the ISM component was much smaller than that of stars for both galaxies, while the ratios of X-ray to optical blue-band luminosities were rather low but within the general scatter for elliptical galaxies. After subtracting the LMXB component, the ISM is shown to be in pressure balance with the intracluster medium of A1060 at the outer boundary of the ISM. These results imply that the hot gas supplied from stellar mass loss is confined by the external pressure of the intracluster medium, with the thermal conduction likely to be suppressed. The cD galaxy NGC 3311 does not exhibit the extended potential structure that is commonly seen in bright elliptical galaxies, and we discuss the possible evolution history of the very isothermal cluster A1060.

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Journal keyword(s): Galaxies: Clusters: Individual: Alphanumeric: A1060 - Galaxies: Elliptical and Lenticular, cD - Galaxies: Individual: NGC Number: NGC 3309 - Galaxies: Individual: NGC Number: NGC 3311 - Galaxies: Interactions - X-Rays: Galaxies

CDS comments: NGC 4879 is a misprint for NGC 4889.

Simbad objects: 13

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Number of rows : 13
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 NGC 1275 Bla 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4243 3
2 NGC 1399 rG 03 38 29.083 -35 27 02.67 11.05 9.74 9.59 8.12   ~ 1636 1
3 ACO S 373 ClG 03 38 29.4 -35 27 08           ~ 2029 0
4 NGC 3309 rG 10 36 35.6607096792 -27 31 05.732321664   11.98 11.78 10.34 10.51 ~ 167 0
5 NAME Hydra I Cluster ClG 10 36 36.0 -27 31 04           ~ 905 1
6 NGC 3311 EmG 10 36 42.821 -27 31 42.02   11.93 10.93 10.00 9.67 ~ 310 2
7 NAME NGC 4636 Group GrG 12 42 49.5 +02 41 08           ~ 570 0
8 NGC 4636 LIN 12 42 49.8333280080 +02 41 15.951929028   12.62 11.84     ~ 1156 1
9 NGC 4697 GiG 12 48 35.8981498824 -05 48 02.482374564   10.97   9.83   ~ 895 0
10 ACO 3526 ClG 12 48 49.2 -41 18 17           ~ 1154 2
11 NGC 4874 LIN 12 59 35.7093764280 +27 57 33.293892204 13.01 13.7 12.71 12.27 11.386 ~ 814 3
12 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
13 NGC 4889 EmG 13 00 08.097 +27 58 37.29 12.93 13.0 11.30 11.652 10.906 ~ 742 1

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