2005ApJ...635.1031B


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.05CEST06:05:27

2005ApJ...635.1031B - Astrophys. J., 635, 1031-1043 (2005/December-3)

O VI in elliptical galaxies: indicators of cooling flows.

BREGMAN J.N., MILLER E.D., ATHEY A.E. and IRWIN J.A.

Abstract (from CDS):

Early-type galaxies often contain a hot X-ray-emitting interstellar medium [(3-8)x106 K] with an apparent radiative cooling time much less than a Hubble time. If unopposed by a heating mechanism, the gas will radiatively cool to temperatures ≲104 K at a rate proportional to LX/TX, typically 0.03-1 M/yr. We can test whether gas is cooling through the 3x105 K range by observing the O VI doublet, whose luminosity is proportional to the cooling rate. Here we report on a study of an unbiased sample of 24 galaxies, obtaining Far Ultraviolet Spectroscopic Explorer spectra to complement the X-ray data of ROSAT and Chandra. The O VI line emission was detected in about 40% of the galaxies and at a luminosity level similar to the prediction from the cooling flow model. There is a correlation between M{dot}_OVI_and M{dot}X, although there is significant dispersion about the relationship, where the O VI is brighter or dimmer than expected by a factor of 3 or more. If the cooling flow picture is to be retained, then this dispersion requires that cooling flows be time-dependent, as might occur by the activity of an AGN. However, of detected objects, those with the highest or lowest values of M{dot}_OVI/M{dot}X_are not systematically hot or cool, as one might predict from AGN heating.

Abstract Copyright:

Journal keyword(s): Galaxies: Cooling Flows - Galaxies: ISM - Ultraviolet: Galaxies - X-Rays: Galaxies

Simbad objects: 25

goto Full paper

goto View the reference in ADS

Number of rows : 25

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 NGC 1316 GiP 03 22 41.789 -37 12 29.52 9.81 9.15 8.53 7.66   ~ 1202 1
2 NGC 1399 BiC 03 38 29.083 -35 27 02.67 11.05 9.74 9.59 8.12   ~ 1448 1
3 NGC 1395 SyG 03 38 29.789 -23 01 39.69   10.71   8.99   ~ 260 0
4 NGC 1404 GiP 03 38 51.917 -35 35 39.81 11.53 10.69 10.00 9.03   ~ 670 1
5 NGC 1407 GiG 03 40 11.904 -18 34 49.36   10.64 9.67 9.13   ~ 526 1
6 NGC 1549 GiP 04 15 45.223 -55 35 32.50 11.22 10.48 9.79 9.08   ~ 225 1
7 NGC 3115 GiG 10 05 13.978 -07 43 06.89   11   9.37   ~ 926 2
8 M 105 LIN 10 47 49.600 +12 34 53.87   10.56 9.76 9.12 8.18 ~ 1379 0
9 NGC 3585 GiG 11 13 17.109 -26 45 17.96   10.64   9.22   ~ 262 0
10 [VV2006] J111654.8+180304 QSO 11 16 54.657 +18 03 06.51   13.84 12.76     ~ 434 0
11 NGC 3923 GiG 11 51 01.783 -28 48 22.36 11.41 10.59 9.80 8.88   ~ 398 1
12 NGC 4125 GiP 12 08 06.017 +65 10 26.88 11.14 10.65 9.72     ~ 397 2
13 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1634 2
14 M 86 GiG 12 26 11.814 +12 56 45.49 10.32 9.83 8.90   7.50 ~ 1012 1
15 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5824 0
16 M 49 Sy2 12 29 46.798 +08 00 01.48   13.21 12.17     ~ 1958 2
17 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6207 3
18 NGC 4494 GiP 12 31 24.034 +25 46 29.93   10.55 9.74     ~ 450 0
19 M 89 LIN 12 35 39.8 +12 33 23 11.29 10.73 9.75     ~ 923 2
20 M 59 GiG 12 42 02.322 +11 38 48.95   11.0       ~ 655 0
21 NGC 4636 LIN 12 42 49.867 +02 41 16.01   12.62 11.84     ~ 1040 1
22 M 60 GiP 12 43 40.008 +11 33 09.40   10.3       ~ 1250 0
23 NGC 4697 GiG 12 48 35.8992791100 -05 48 02.497675635   10.97   9.83   ~ 803 0
24 NGC 5846 BiC 15 06 29.253 +01 36 20.29   11.9   9.74   ~ 771 1
25 IC 1459 GiP 22 57 10.60677155 -36 27 43.9953697   10.96 11.85 9.34 10.3 ~ 571 2

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2005ApJ...635.1031B and select 'bookmark this link' or equivalent in the popup menu


2020.07.05-06:05:27

© Université de Strasbourg/CNRS

    • Contact