2009A&A...501..157N


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.06CEST23:37:43

2009A&A...501..157N - Astronomy and Astrophysics, volume 501, 157-169 (2009/7-1)

Gravitational potential and X-ray luminosities of early-type galaxies observed with XMM-Newton and Chandra.

NAGINO R. and MATSUSHITA K.

Abstract (from CDS):

We study the dark matter content in early-type galaxies and investigate whether X-ray luminosities of early-type galaxies are determined by the surrounding gravitational potential. We derived gravitational mass profiles of 22 early-type galaxies observed with XMM-Newton and Chandra. Sixteen galaxies show constant or decreasing radial temperature profiles, and their X-ray luminosities are consistent with kinematical energy input from stellar mass loss. The temperature profiles of the other 6 galaxies increase with radius, and their X-ray luminosities are significantly higher. The integrated mass-to-light ratio of each galaxy is constant at that of stars within 0.5-1re, and increases with radius, where re is the effective radius of a galaxy. The scatter of the central mass-to-light ratio of galaxies was less in K-band light. At 3re, the integrated mass-to-light ratios of galaxies with flat or decreasing temperature profiles are twice the value at 0.5re, where the stellar mass dominates, and at 6re, these increase to three times the value at 0.5re. This feature should reflect common dark and stellar mass distributions in early-type galaxies: within 3re, the mass of dark matter is similar to the stellar mass, while within 6re, the former is larger than the latter by a factor of two. In contrast, X-ray luminous galaxies have higher gravitational mass in the outer regions than X-ray faint galaxies. We describe these X-ray luminous galaxies as the central objects of large potential structures; the presence or absence of this potential is the main source of the large scatter in the X-ray luminosity.

Abstract Copyright:

Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: ISM - X-rays: galaxies - X-rays: ISM

Simbad objects: 27

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Number of rows : 27

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 2E 0150.5-1358 ClG 01 53 00.40 -13 44 18.0           ~ 386 0
2 NGC 720 GiG 01 53 00.523 -13 44 19.25   12.4   10.36   ~ 492 0
3 NGC 1316 GiP 03 22 41.789 -37 12 29.52 9.81 9.15 8.53 7.66   ~ 1202 1
4 NGC 1332 GiP 03 26 17.321 -21 20 07.33   11.45   9.84   ~ 308 0
5 NGC 1399 BiC 03 38 29.083 -35 27 02.67 11.05 9.74 9.59 8.12   ~ 1448 1
6 NGC 1395 SyG 03 38 29.789 -23 01 39.69   10.71   8.99   ~ 260 0
7 ACO S 373 ClG 03 38 30 -35 27.3           ~ 1538 0
8 NGC 1404 GiP 03 38 51.917 -35 35 39.81 11.53 10.69 10.00 9.03   ~ 670 1
9 NGC 1549 GiP 04 15 45.223 -55 35 32.50 11.22 10.48 9.79 9.08   ~ 225 1
10 NGC 3585 GiG 11 13 17.109 -26 45 17.96   10.64   9.22   ~ 262 0
11 [VV2006] J111654.8+180304 QSO 11 16 54.657 +18 03 06.51   13.84 12.76     ~ 434 0
12 NGC 3665 rG 11 24 43.630 +38 45 46.05 13.71 13.26 11.62     ~ 297 1
13 NGC 3923 GiG 11 51 01.783 -28 48 22.36 11.41 10.59 9.80 8.88   ~ 398 1
14 NGC 4365 GiG 12 24 28.228 +07 19 03.07   11.5       ~ 798 0
15 M 85 GiP 12 25 24.053 +18 11 27.89   10.2       ~ 602 0
16 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5824 0
17 M 49 Sy2 12 29 46.798 +08 00 01.48   13.21 12.17     ~ 1958 2
18 NGC 4477 Sy2 12 30 02.172 +13 38 11.19 11.98 11.38 10.42     ~ 362 2
19 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6208 3
20 NGC 4526 GiG 12 34 03.029 +07 41 56.90   10.6       ~ 600 1
21 M 89 LIN 12 35 39.8 +12 33 23 11.29 10.73 9.75     ~ 923 2
22 NGC 4636 LIN 12 42 49.867 +02 41 16.01   12.62 11.84     ~ 1040 1
23 M 60 GiP 12 43 40.008 +11 33 09.40   10.3       ~ 1250 0
24 NGC 5044 BiC 13 15 23.969 -16 23 08.00   11.9   10.74   ~ 451 0
25 NGC 5322 SyG 13 49 15.24 +60 11 25.8   11.3       ~ 381 2
26 NGC 5846 BiC 15 06 29.253 +01 36 20.29   11.9   9.74   ~ 771 1
27 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

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2020.07.06-23:37:43

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