2003A&A...411...41T


Query : 2003A&A...411...41T

2003A&A...411...41T - Astronomy and Astrophysics, volume 411, 41-53 (2003/11-4)

An X-ray halo in the ``hot-spot'' galaxy NGC 2903.

TSCHOEKE D., HENSLER G. and JUNKES N.

Abstract (from CDS):

In this paper we present ROSAT PSPC and HRI observations of the ``hot-spot'' galaxy NGC 2903. This isolated system strikingly reveals a soft extended X-ray feature reaching in north-west direction up to a projected distance of 5.2kpc from the center into the halo. The residual X-ray emission in the disk reveals the same extension as the Hα disk. No eastern counterpart of the western X-ray halo emission has been detected. The luminosity of the extraplanar X-ray gas is several 1038erg/s, comparable to X-ray halos in other starburst galaxies. It has a plasma temperature of about 0.2keV. The estimated star formation rate derived from X-rays and Hα results in 1-2M/yr. Since galactic superwinds, giant kpc-scale galactic outflows, seem to be a common phenomenon observed in a number of edge-on galaxies, especially in the X-ray regime, and are produced by excess star-formation activity, the existence of hot halo gas as found in NGC 2903 can be attributed to events such as central starbursts. That such a starburst has taken place in NGC 2903 must be proven. The detection of hot gas above galaxy disks also with intermediate inclination, however, encounters the difficulty of discriminating between that contribution from disk and active nuclear region.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: starburst - galaxies: ISM - galaxies: individual: NGC 2903 - X-rays: galaxies

Nomenclature: Table 3: [THJ2003] HRI N (Nos 1-4). Table 4: [THJ2003] PSPC NN (Nos 1-18).

CDS comments: Regions from Table 5 not in SIMBAD.

Simbad objects: 29

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Number of rows : 29
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3124 2
2 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1639 2
3 NGC 1808 Sy2 05 07 42.343 -37 30 46.98 11.05 10.80 9.94 9.36 10.2 ~ 682 3
4 NGC 2146 SBG 06 18 37.710 +78 21 25.27 11.67 11.38 10.59     ~ 666 2
5 [THJ2003] PSPC 18 X 09 30 45.5 +21 02 17           ~ 1 0
6 HD 82157 * 09 30 46.6844625072 +21 02 14.821601748   9.13 8.80     F0 7 0
7 [THJ2003] PSPC 6 X 09 30 56.5 +21 34 34           ~ 1 0
8 [THJ2003] PSPC 13 X 09 30 59.9 +21 29 09           ~ 1 0
9 [THJ2003] PSPC 12 X 09 31 20.7 +21 29 44           ~ 1 0
10 [THJ2003] PSPC 8 X 09 31 25.6 +21 33 46           ~ 1 0
11 [THJ2003] PSPC 15 X 09 31 44.4 +21 17 04           ~ 1 0
12 [THJ2003] HRI 4 X 09 31 48.7 +21 24 43           ~ 1 0
13 QSO B0929+2157 QSO 09 31 56.3224632072 +21 44 06.536041440   19.40 19.15     ~ 14 0
14 [THJ2003] HRI 1 HII 09 32 05.4 +21 32 36           ~ 1 1
15 QSO B0929+2128 QSO 09 32 07.4870677512 +21 15 14.103001908   19.42 19.20     ~ 25 0
16 NGC 2905 H2G 09 32 10.111 +21 30 02.99 10.44 9.75 9.07 8.68   ~ 1050 3
17 [THJ2003] PSPC 2 X 09 32 12.9 +21 48 12           ~ 1 0
18 HD 82394 * 09 32 13.2231840888 +21 51 23.021292420   8.45 7.45     K0III 22 1
19 [THJ2003] PSPC 5 X 09 32 33.3 +21 41 54           ~ 1 0
20 [THJ2003] PSPC 7 X 09 32 56.3 +21 33 57           ~ 1 0
21 [THJ2003] PSPC 3 X 09 33 14.3 +21 46 00           ~ 1 0
22 2E 0930.5+2145 X 09 33 20.8 +21 32 40           ~ 2 0
23 2MASX J09334777+2114362 Sy1 09 33 47.7556393104 +21 14 36.488022396   18.37 17.94     ~ 31 0
24 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5583 6
25 NGC 3628 GiP 11 20 17.018 +13 35 22.16   10.42 9.48 9.22   ~ 784 3
26 M 61 Sy2 12 21 54.9282582888 +04 28 25.597367184 10.07 10.18 9.65     ~ 935 2
27 NGC 4410 LIN 12 26 28.2946646976 +09 01 11.500520016   13.6 13.20     ~ 109 1
28 NGC 4565 LIN 12 36 20.804 +25 59 14.61   13.61 12.43     ~ 913 0
29 M 90 Sy2 12 36 49.8009839880 +13 09 46.523813040 10.56 10.26 9.54     ~ 846 1

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2022.05.22-12:03:56

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