2011A&A...535A..93P

Query : 2011A&A...535A..93P

2011A&A...535A..93P - Astronomy and Astrophysics, volume 535A, 93-93 (2011/11-1)

The X-ray emission of local luminous infrared galaxies.

PEREIRA-SANTAELLA M., ALONSO-HERRERO A., SANTOS-LLEO M., COLINA L., JIMENEZ-BAILON E., LONGINOTTI A.L., RIEKE G.H., WARD M. and ESQUEJ P.

Abstract (from CDS):

We study the X-ray emission of a representative sample of 27 local luminous infrared galaxies (LIRGs). The median IR luminosity of our sample is logLIR/L☉=11.2, therefore the low-luminosity end of the LIRG class is well represented. We used new XMM-Newton data as well as Chandra and XMM-Newton archive data. The soft X-ray (0.5-2keV) emission of most of the galaxies (>80%), including LIRGs hosting a Seyfert 2 nucleus, is dominated by star-formation-related processes. These LIRGs follow the star-formation rate (SFR) versus soft X-ray luminosity correlation observed in local starbursts. We find that ∼15% of the non-Seyfert LIRGs (3 out of 20) have an excessively hard X-ray emission relative to that expected from star-formation, which might indicate the presence of an obscured AGN. The rest of the non-Seyfert LIRGs follow the SFR versus hard X-ray (2-10keV) luminosity correlation of local starbursts. The non-detection of the 6.4keV FeKα emission line in the non-Seyfert LIRGs allows us to put an upper limit on the bolometric luminosity of an obscured AGN, Lbol<1043erg/s. That is, if these galaxies were hosting a low-luminosity AGN, its contribution to the total luminosity would be less than 10%. Finally we estimate that the AGN contribution to the total luminosity for our sample of local LIRGs is between 7% and 10%.

Abstract Copyright: ∼

Journal keyword(s): galaxies: active - galaxies: starburst - X-ray: galaxies

CDS comments: Paragraph. 4.2 ULX candidate in NGC 2369 is 1RXS J071638.2-622024 in Simbad.

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 - 2024 		#notes
1 NGC 23 AG? 00 09 53.411 +25 55 25.46   12.5       ~ 313 3
2 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3336 2
3 NGC 1559 GiG 04 17 35.7508602240 -62 47 01.251567384   11.19 10.45 10.11 10.4 ~ 282 1
4 NGC 1614 Sy1 04 34 00.027 -08 34 44.57   14.66 13.99     ~ 667 0
5 NGC 2369 Sy1 07 16 37.753 -62 20 37.51   13.23   11.56 12.3 ~ 130 0
6 1RXS J071638.2-622024 X 07 16 38.2 -62 20 24           ~ 1 0
7 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5860 6
8 NGC 3110 Sy1 10 04 02.0 -06 28 29   13.4   13.3 12.5 ~ 174 3
9 NGC 3256 Sy2 10 27 51.284 -43 54 13.55   11.83 11.33 10.62 11.9 ~ 848 2
10 IC 694 AG? 11 28 27.312 +58 34 42.29   18.2       ~ 252 2
11 NGC 3690 IG 11 28 31.0 +58 33 41   13.19 12.86     ~ 978 4
12 ESO 320-30 EmG 11 53 11.722 -39 07 48.72   13.30   11.86   ~ 186 1
13 IC 860 LIN 13 15 03.51 +24 37 07.8   14.8       ~ 217 0
14 MCG-03-34-063 Sy2 13 22 19.0228826784 -16 42 30.084610752   14   13.77   ~ 58 3
15 MCG-03-34-064 Sy2 13 22 24.4583154360 -16 43 42.481822404   14   13.16   ~ 315 2
16 NGC 5135 Sy2 13 25 44.059 -29 50 01.24   12.58 13.35 11.53 12.2 ~ 474 1
17 IC 4280 Sy1 13 32 53.390 -24 12 25.83   13.48   12.17 15.22 ~ 78 0
18 ESO 221-10 Sy2 13 50 56.924 -49 03 19.72   12.96 11.93 11.75 12.7 ~ 77 0
19 NGC 5653 H2G 14 30 10.4187147048 +31 12 55.568509596   12.7       ~ 174 1
20 NGC 5734 Sy2 14 45 09.0364267176 -20 52 13.484556696   13.75   12.08   ~ 81 1
21 NGC 5743 EmG 14 45 10.983 -20 54 48.81   13.85   12.54   ~ 46 1
22 IC 4518 Sy2 14 57 45.6 -43 07 58   14.5       ~ 74 0
23 Z 49-57 GiC 15 13 13.0927 +07 13 31.850   15.5       ~ 238 1
24 IC 4686 AG? 18 13 38.7810951072 -57 43 57.306382932   14.67   13.52   ~ 67 1
25 IC 4687 AGN 18 13 39.829 -57 43 31.25   14.35 14.3 12.78   ~ 136 1
26 IC 4734 GiG 18 38 25.6846404504 -57 29 25.078201116   14.21   12.71   ~ 85 0
27 NGC 6921 Sy2 20 28 28.8658027224 +25 43 24.094324884 15.41   12.897     ~ 95 1
28 MCG+04-48-002 Sy2 20 28 35.061 +25 44 00.18   18       ~ 144 1
29 NGC 7130 Sy2 21 48 19.5412287192 -34 57 04.492024884   12.86 13.87 11.57   ~ 450 0
30 IC 5179 Sy1 22 16 09.1191653256 -36 50 37.117603752   12.29 11.89 11.38   ~ 204 1
31 NGC 7469 Sy1 23 03 15.6 +08 52 26 12.60 13.00 12.34     ~ 2095 3
32 NGC 7679 Sy2 23 28 46.6613717400 +03 30 41.013578196   13.2       ~ 270 1
33 NGC 7682 Sy2 23 29 03.9181335984 +03 31 59.921415444   14.3       ~ 234 0
34 NGC 7769 LIN 23 51 03.9747703056 +20 09 01.552564620   12.77       ~ 149 1
35 XMMU J235122.3+200637 X 23 51 22.3 +20 06 37           ~ 2 0
36 NGC 7770 GiG 23 51 22.610 +20 05 48.56   14.5       ~ 101 1
37 NGC 7771 GiG 23 51 24.880 +20 06 42.57 13.42 13.08 12.25     ~ 338 4
38 XMMU J235127.2+200652 X 23 51 27.2 +20 06 52           ~ 3 0

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