2009ApJ...705.1672B


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.15CEST06:28:00

2009ApJ...705.1672B - Astrophys. J., 705, 1672-1685 (2009/November-2)

X-ray isophotes in a rapidly rotating elliptical galaxy: evidence of inflowing gas.

BRIGHENTI F., MATHEWS W.G., HUMPHREY P.J. and BUOTE D.A.

Abstract (from CDS):

We describe two-dimensional gasdynamical computations of the X-ray emitting gas in the rotating elliptical galaxy NGC 4649 that indicate an inflow of ∼1 M/yr at every radius. Such a large instantaneous inflow cannot have persisted over a Hubble time. The central constant-entropy temperature peak recently observed in the innermost 150 pc is explained by compressive heating as gas flows toward the central massive black hole. Since the cooling time of this gas is only a few million years, NGC 4649 provides the most acutely concentrated known example of the cooling flow problem in which the time-integrated apparent mass that has flowed into the galactic core exceeds the total mass observed there. This paradox can be resolved by intermittent outflows of energy or mass driven by accretion energy released near the black hole. Inflowing gas is also required at intermediate kpc radii to explain the ellipticity of X-ray isophotes due to spin-up by mass ejected by stars that rotate with the galaxy and to explain local density and temperature profiles. We provide evidence that many luminous elliptical galaxies undergo similar inflow spin-up. A small turbulent viscosity is required in NGC 4649 to avoid forming large X-ray luminous disks that are not observed, but the turbulent pressure is small and does not interfere with mass determinations that assume hydrostatic equilibrium.

Abstract Copyright:

Journal keyword(s): cooling flows - galaxies: elliptical and lenticular, cD - galaxies: individual: NGC 4649 - galaxies: ISM - galaxies: kinematics and dynamics - X-rays: galaxies

Simbad objects: 38

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Number of rows : 38

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NGC 193 rG 00 39 18.578 +03 19 52.87   14.3       ~ 125 1
2 NGC 315 LIN 00 57 48.88335 +30 21 08.8122 12.80 12.20 11.16 11.26   ~ 723 2
3 NGC 383 rG 01 07 24.95870 +32 24 45.2140   13.6 12.14     ~ 732 3
4 NGC 507 BiC 01 23 39.950 +33 15 22.22   13.0       ~ 400 3
5 NGC 533 GiG 01 25 31.432 +01 45 33.57   13.1 14.11     ~ 209 0
6 2E 0150.5-1358 ClG 01 53 00.40 -13 44 18.0           ~ 386 0
7 NGC 720 GiG 01 53 00.523 -13 44 19.25   12.4   10.36   ~ 494 0
8 NGC 741 rG 01 56 20.959 +05 37 43.77   13.2       ~ 269 2
9 RXC J0252.8-0116 ClG 02 52 49.4 -01 16 27           ~ 100 0
10 NGC 1132 GiG 02 52 51.82 -01 16 29.0   13.9   12.16   ~ 150 0
11 NGC 1316 GiP 03 22 41.789 -37 12 29.52 9.81 9.15 8.53 7.66   ~ 1231 1
12 NGC 1399 BiC 03 38 29.083 -35 27 02.67 11.05 9.74 9.59 8.12   ~ 1475 1
13 NGC 1404 GiP 03 38 51.917 -35 35 39.81 11.53 10.69 10.00 9.03   ~ 679 1
14 NGC 1407 GiG 03 40 11.904 -18 34 49.36   10.64 9.67 9.13   ~ 536 1
15 NGC 1549 GiP 04 15 45.223 -55 35 32.50 11.22 10.48 9.79 9.08   ~ 227 1
16 NGC 1553 GiP 04 16 10.4711638537 -55 46 48.107262747 10.76 10.10 9.40 8.74   ~ 358 2
17 NGC 1600 GiG 04 31 39.858 -05 05 09.97   8.9   10.81   ~ 340 0
18 NGC 1700 GiG 04 56 56.347 -04 51 56.64   12   11.14   ~ 333 1
19 NGC 3923 GiG 11 51 01.783 -28 48 22.36 11.41 10.59 9.80 8.88   ~ 405 1
20 NGC 4125 GiP 12 08 06.017 +65 10 26.88 11.14 10.65 9.72     ~ 401 2
21 NGC 4261 LIN 12 19 23.2160630 +05 49 29.700024   13.92 12.87     ~ 1141 0
22 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1665 2
23 M 86 GiG 12 26 11.814 +12 56 45.49 10.32 9.83 8.90   7.50 ~ 1022 1
24 M 49 Sy2 12 29 46.798 +08 00 01.48   13.21 12.17     ~ 1989 2
25 NGC 4526 GiG 12 34 03.029 +07 41 56.90   10.6       ~ 613 1
26 M 89 LIN 12 35 39.8073444 +12 33 22.830809 11.29 10.73 9.75     ~ 941 2
27 NGC 4636 LIN 12 42 49.867 +02 41 16.01   12.62 11.84     ~ 1051 1
28 M 60 GiP 12 43 40.008 +11 33 09.40   10.3       ~ 1270 0
29 NGC 4697 GiG 12 48 35.8992791099 -05 48 02.497675635   10.97   9.83   ~ 814 0
30 NGC 5018 GiP 13 13 01.000 -19 31 05.87   11.71   10.31   ~ 288 1
31 NGC 5044 BiC 13 15 23.969 -16 23 08.00   11.9   10.74   ~ 462 0
32 IC 4296 AGN 13 36 39.03275288 -33 57 57.0783023   11.52 12.99 10.00   ~ 456 2
33 NGC 5846 BiC 15 06 29.253 +01 36 20.29   11.9   9.74   ~ 789 1
34 IC 1262 BiC 17 33 02.022 +43 45 34.51   14.9       ~ 68 0
35 NGC 6482 GiG 17 51 48.8334002678 +23 04 18.884647281 12.71 12.35 11.45     ~ 193 1
36 NGC 7052 rG 21 18 33.047 +26 26 48.65 15.52 14.85 13.09     ~ 303 1
37 IC 1459 GiP 22 57 10.60677155 -36 27 43.9953697   10.96 11.85 9.34 10.3 ~ 586 2
38 NGC 7618 GiG 23 19 47.212 +42 51 09.65   14.3       ~ 53 2

    Equat.    Gal    SGal    Ecl

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2021.04.15-06:28:00

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