2004MNRAS.352.1335J

Query : 2004MNRAS.352.1335J

2004MNRAS.352.1335J - Mon. Not. R. Astron. Soc., 352, 1335-1346 (2004/August-3)

XMM-Newton observations of the starburst merger galaxies NGC 3256 and NGC 3310.

JENKINS L.P., ROBERTS T.P., WARD M.J. and ZEZAS A.

Abstract (from CDS):

We present XMM-Newton EPIC observations of the two nearby starburst merger galaxies NGC 3256 and NGC 3310. The broad-band (0.3-10 keV) integrated X-ray emission from both galaxies shows evidence of multiphase thermal plasmas plus an underlying hard non-thermal power-law continuum. NGC 3256 is well fitted with a model comprising two mekal components (kT= 0.6/0.9 keV) plus a hard power law (Γ= 2), while NGC 3310 has cooler mekal components (kT= 0.3/0.6 keV) and a harder power-law tail (Γ= 1.8). Chandra observations of both galaxies reveal the presence of numerous discrete sources embedded in the diffuse emission, which dominate the emission above ∼2 keV and are likely to be the source of the power-law emission. The thermal components show a trend of increasing absorption with higher temperature, suggesting that the hottest plasmas arise from supernova-heated gas within the discs of the galaxies, while the cooler components arise from outflowing galactic winds interacting with the ambient interstellar medium. We find no strong evidence for an active galactic nucleus in either galaxy.

Abstract Copyright: 2004 RAS

Journal keyword(s): galaxies: individual: NGC 3256 - galaxies: individual: NGC 3310 - galaxies: ISM - galaxies: starburst - X-rays: binaries - X-rays: galaxies

Nomenclature: Table 6: [RW2000] NGC 3310 X-3 added.

Simbad objects: 20

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Number of rows : 20
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3588 2
2 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 6156 6
3 NGC 3256 Sy2 10 27 51.284 -43 54 13.55   11.83 11.33 10.62 11.9 ~ 920 2
4 [LWZ2002] 14 X 10 27 55.14 -43 54 47.1           ~ 4 1
5 [BWC2008] U13 ULX 10 38 42.86 +53 31 06.6           ~ 7 1
6 NGC 3310 AGN 10 38 45.85707 +53 30 11.8940   12.45 12.15     ~ 809 1
7 [RW2000] NGC 3310 X-2 X 10 38 49.8 +53 29 33           ~ 4 0
8 NGC 3690C G 11 28 30.70 +58 33 48.4           ~ 351 0
9 NGC 3690 IG 11 28 31.0 +58 33 41   13.19 12.86     ~ 1015 4
10 NGC 3690B GiP 11 28 31.02 +58 33 40.7   11.8       ~ 635 4
11 NGC 3690NE AGN 11 28 33.07 +58 33 54.2   11.8       ~ 635 4
12 NGC 4038 EmG 12 01 53.002 -18 52 03.32   10.91   9.74 11.0 ~ 1364 1
13 NAME Antennae IG 12 01 53.170 -18 52 37.92           ~ 1749 0
14 NGC 4039 GiP 12 01 53.51 -18 53 10.3   11.08   9.77   ~ 1173 1
15 NGC 4485 GiP 12 30 31.113 +41 42 04.22 12.10 12.42 11.93 11.93   ~ 305 2
16 NGC 4490 GiG 12 30 34.5 +41 38 26 10.03 10.22 9.79     ~ 616 3
17 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1582 2
18 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 3138 2
19 NGC 5471 EmG 14 04 28.627 +54 23 52.84           ~ 250 1
20 NGC 6240 Sy2 16 52 58.9 +02 24 03   14.31 13.37     ~ 1734 2

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