2006ApJ...642..746B


C.D.S. - SIMBAD4 rel 1.7 - 2020.06.02CEST11:31:59

2006ApJ...642..746B - Astrophys. J., 642, 746-751 (2006/May-2)

O VI observations of galaxy clusters: evidence for modest cooling flows.

BREGMAN J.N., FABIAN A.C., MILLER E.D. and IRWIN J.A.

Abstract (from CDS):

A prediction of the galaxy-cluster cooling flow model is that as gas cools from the ambient cluster temperature, emission lines are produced in gas at subsequently decreasing temperatures. Gas passing through 105.5 K emits in the lines of O VI λλ1032, 1035, and here we report a FUSE study of these lines in three cooling flow clusters, Abell 426, Abell 1795, and AWM 7. No emission was detected from AWM 7, but O VI is detected from the centers of Abell 426 and Abell 1795, and possibly to the south of the center in Abell 1795, where X-ray and optical emission line filaments lie. In Abell 426 these line luminosities imply a cooling rate of 32±6 M/yr within the central r=6.2 kpc region, while for Abell 1795 the central cooling rate is 26±7 M/yr (within r=22 kpc), and about 42±9 M/yr including the southern pointing. Including other studies, three of six clusters have O VI emission, and they also have star formation as well as emission lines from 104 K gas. These observations are generally consistent with the cooling flow model, but at a rate closer to 30 M/yr than to the originally suggested values of 102-10^ 3^ M/yr.

Abstract Copyright:

Journal keyword(s): Galaxies: Cooling Flows - Galaxies: Clusters: Individual: Name: Abell 426 - Galaxies: Clusters: Individual: Name: Abell 1795 - Galaxies: Clusters: Individual: Alphanumeric: AWM 7 - Ultraviolet: Galaxies

Status at CDS:  

Simbad objects: 9

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Number of rows : 9

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 2MAXI J0254+416 ClG 02 54 32.2 +41 35 10           ~ 297 1
2 ACO 3112 ClG 03 17 52.4 -44 14 35           ~ 289 1
3 ACO 426 ClG 03 19 47.2 +41 30 47           ~ 1931 1
4 3C 84 Sy2 03 19 48.1597607660 +41 30 42.114155434   13.10 12.48 11.09   ~ 3523 3
5 NGC 1399 BiC 03 38 29.083 -35 27 02.67 11.05 9.74 9.59 8.12   ~ 1442 1
6 ACO 1795 ClG 13 49 00.5 +26 35 07           ~ 1150 0
7 NGC 5846 BiC 15 06 29.253 +01 36 20.29   11.9   9.74   ~ 770 1
8 ACO 2029 ClG 15 10 58.7 +05 45 42           ~ 850 0
9 ACO 2597 ClG 23 25 19.70 -12 07 27.7           ~ 490 0

    Equat.    Gal    SGal    Ecl

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2020.06.02-11:31:59

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