1998A&A...340..351P

Query : 1998A&A...340..351P

1998A&A...340..351P - Astronomy and Astrophysics, volume 340, 351-370 (1998/12-2)

NGC 3079: X-ray emission from the nuclear super-bubble and halo.

PIETSCH W., TRINCHIERI G. and VOGLER A.

Abstract (from CDS):

We report the results of the spatial and spectral analysis of the ROSAT HRI and PSPC observations of the edge-on spiral galaxy NGC 3079. We detected several sources in the field of NGC 3079 with both PSPC and HRI, and complex emission from the inner 5' around NGC 3079. We have identified possible counterparts for several of the sources outside NGC 3079 by comparison with optical plates and catalogues. The X-ray emission from NGC 3079 has a LX=3x1040erg/s and can be resolved into the following three components: (o) Extended emission in the innermost region, with LX=1x1040erg/s, coincident with the super-bubble seen in optical images. The active nucleus may contribute to the emission as a point source. (o) Emission from the disk of the galaxy, with LX=7x1039erg/s, that can be partly resolved by the HRI in 3 point-like sources with luminosities of ∼6x1038erg/s each. (o) Very soft X-shaped emission from the halo, with LX=6x1039erg/s, extending to a diameter of 27kpc. The X-ray luminosity of NGC 3079 is higher by a factor of 10 compared to other galaxies of similar optical luminosity and we argue that this may be caused by the presence of an AGN rather than by starburst activity. The influence of the AGN on the companion galaxies in the NGC 3079 group are discussed.

Abstract Copyright: ∼

Journal keyword(s): galaxies: active - galaxies: individual: NGC 3079 - galaxies: jets - X-rays: galaxies

Nomenclature: Table 3: [PTV98] HNN (Nos H1-H23). Table 4: [PTV98] PNN (Nos P1-P34).

Simbad objects: 56

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Number of rows : 56
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 RX J100158.5+554049 X 00 01 58.6 +55 40 49           ~ 1 0
2 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3336 2
3 M 77 Sy2 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4602 2
4 NGC 2146 SBG 06 18 37.710 +78 21 25.27 11.67 11.38 10.59     ~ 721 2
5 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5860 6
6 RX J095956.3+554639 X 09 59 56.4 +55 46 40           ~ 1 0
7 RX J100008.8+553448 X 10 00 08.9 +55 34 49           ~ 1 0
8 2XMM J100032.1+553630 Sy2 10 00 32.2408996752 +55 36 30.938883156   19.99 19.37     ~ 23 0
9 RX J100037.4+555046 X 10 00 37.4 +55 50 47           ~ 1 0
10 NGC 3073 GiP 10 00 52.0678224264 +55 37 07.881619152 14.12 14.07 13.40     ~ 191 2
11 [VV2000] J100056.3+554058 QSO 10 00 56.6059140768 +55 40 59.778799644   19.1 19.99 19.2   ~ 22 0
12 RX J100058.9+555141 X 10 00 58.9 +55 51 41           ~ 1 0
13 QSO B0957+5549 QSO 10 01 04.3289567688 +55 35 21.674921352   19.36 19.04     ~ 39 0
14 QSO B0957+557 QSO 10 01 10.1846023920 +55 28 34.605342984   17.5 17.5     ~ 46 0
15 RX J100113.3+554906 X 10 01 13.4 +55 49 06           ~ 1 0
16 Z 265-55 AG? 10 01 14.033 +55 43 05.63   14.6       ~ 39 1
17 RX J100116.8+554709 X 10 01 16.8 +55 47 09           ~ 1 0
18 SDSS J100119.79+554558.1 QSO 10 01 19.7897179920 +55 45 58.069201716   21.19 20.86     ~ 18 0
19 RX J100120.6+555355 X 10 01 20.6 +55 53 56           ~ 1 0
20 RX J100120.9+553244 X 10 01 20.9 +55 32 44           ~ 1 0
21 RX J100123.5+553953 X 10 01 23.5 +55 39 54           ~ 1 0
22 RX J100130.2+554033 X 10 01 30.2 +55 40 33           ~ 1 0
23 HD 86661 PM* 10 01 38.2168041938 +55 35 06.310314917   8.68 7.95 7.5   K0 56 0
24 RX J100144.9+554117 X 10 01 44.9 +55 41 17           ~ 1 0
25 RX J100146.6+555036 X 10 01 46.6 +55 50 36           ~ 1 0
26 RX J100156.1+554034 X 10 01 56.1 +55 40 34           ~ 2 0
27 RX J100156.3+555434 X 10 01 56.3 +55 54 34           ~ 1 0
28 RX J100157.6+553948 X 10 01 57.6 +55 39 48           ~ 1 0
29 NGC 3079 Sy2 10 01 57.8789863992 +55 40 47.449758324 11.57 11.54 10.86     ~ 1391 3
30 RX J100200.5+553200 X 10 02 00.5 +55 32 00           ~ 1 0
31 RX J100200.7+553651 X 10 02 00.7 +55 36 51           ~ 1 0
32 RX J100202.8+553903 HXB 10 02 02.89 +55 38 58.8           ~ 4 0
33 RX J100205.0+554555 X 10 02 05.0 +55 45 56           ~ 1 0
34 RX J100206.0+554236 X 10 02 06.0 +55 42 36           ~ 1 0
35 RX J100206.2+552750 X 10 02 06.2 +55 27 50           ~ 1 0
36 RX J100212.9+553553 X 10 02 12.973 +55 35 55.32           ~ 2 0
37 HD 237859 * 10 02 23.0779035672 +55 34 30.867587076   9.82 9.41     F0 19 0
38 RX J100228.2+553941 X 10 02 28.3 +55 39 41           ~ 1 0
39 RX J100237.4+553505 X 10 02 37.4 +55 35 05           ~ 1 0
40 RX J100240.8+554910 X 10 02 40.8 +55 49 10           ~ 1 0
41 RX J100244.9+555110 X 10 02 44.9 +55 51 11           ~ 1 0
42 RX J100245.1+555758 X 10 02 45.1 +55 57 58           ~ 1 0
43 SDSS J100245.45+554646.8 QSO 10 02 45.4552805568 +55 46 46.700783580           ~ 11 0
44 RX J100254.2+554226 X 10 02 54.2 +55 42 27           ~ 1 0
45 RX J100303.4+554752 X 10 03 03.4 +55 47 52           ~ 1 0
46 RX J100305.5+553727 X 10 03 05.5 +55 37 28           ~ 1 0
47 RX J100309.6+554135 X 10 03 09.6 +55 41 35           ~ 1 0
48 RX J100327.8+552625 X 10 03 27.8 +55 26 26           ~ 1 0
49 RX J100333.5+553627 X 10 03 33.5 +55 36 27           ~ 1 0
50 RX J100343.6+553331 X 10 03 43.7 +55 33 31           ~ 1 0
51 NAME NGC 3079 Group GrG 10 03 45 +54 58.3           ~ 5 0
52 M 106 Sy2 12 18 57.620 +47 18 13.39   9.14 8.41 8.11   ~ 2364 3
53 NGC 4565 LIN 12 36 20.804 +25 59 14.61   13.61 12.43     ~ 956 0
54 NGC 4631 GiP 12 42 08.009 +32 32 29.44   9.78 9.19 9.10   ~ 1095 2
55 M 51 Sy2 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4330 4
56 NGC 5906 GiG 15 15 53.687 +56 19 43.86   11.4       ~ 768 1

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