2002ApJ...565..108E

Query : 2002ApJ...565..108E

2002ApJ...565..108E - Astrophys. J., 565, 108-124 (2002/January-3)

Three LINERs under the Chandra X-ray microscope.

ERACLEOUS M., SHIELDS J.C., CHARTAS G. and MORAN E.C.

Abstract (from CDS):

We use observations of three galaxies hosting low-ionization nuclear emission-line regions (LINERs; NGC 404, NGC 4736, and NGC 4579) with the Chandra X-Ray Observatory to study their power sources. We find very diverse properties within this small group: NGC 404 has an X-ray faint nucleus with a soft, thermal spectrum; NGC 4736 harbors a plethora of discrete X-ray sources in and around its nucleus; and NGC 4579 has a dominant nuclear point source embedded in a very extended, diffuse nebulosity. From their multiwavelength properties we conclude the following about the power sources in these LINERs: the nucleus of NGC 404 is the site of a weak, compact starburst, whose X-ray emission is due to gas heated by stellar winds and supernovae; NGC 4736 appears to be in a recent or aging starburst phase, where the X-ray emission is dominated by a dense cluster of X-ray binaries; and NGC 4579 is powered by accretion onto a supermassive black hole. We detect 39 discrete sources in NGC 4736 and 21 in NGC 4579, most with LX>1037 ergs.s–1. One source in the disk of NGC 4579 appears to be an ultraluminous X-ray binary with LX(2-10keV)= 9x1039 ergs.s–1, but it could also be a background quasar. The most luminous discrete sources have simple power-law spectra, which along with their luminosities suggest that these are X-ray binaries accreting near or above the Eddington rate for a neutron star. By comparing the luminosity functions of discrete X-ray sources in these and other galaxies, we find a potential connection between the age of the stellar population and the slope of the cumulative X-ray luminosity function: galaxies with primarily old stellar populations have steeper X-ray luminosity functions than starburst galaxies. We suggest that this difference results from the contribution of high-mass X-ray binaries from the young stellar population to the upper end of the luminosity function.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Active - Galaxies: Nuclei - X-Rays: Binaries - X-Rays: Galaxies

Nomenclature: Table 4: [ESC2002] NGC 4736 X-N (Nos X-1 to X-4). Table 5: [ESC2002] NGC 4579 X-N (No. X-1).

Simbad objects: 74

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Number of rows : 74
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 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
2 NGC 404 LIN 01 09 27.02 +35 43 05.3   12.56 11.73     ~ 511 0
3 SK 160 HXB 01 17 05.1457288392 -73 26 36.014808156 12.23 13.00 13.15   13.17 O9.7Ia+ 918 0
4 NGC 1553 GiP 04 16 10.4697802536 -55 46 48.072797400 10.76 10.10 9.40 8.74   ~ 395 2
5 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
6 X LMC X-4 HXB 05 32 49.5556042296 -66 22 13.202721768   13.9 14.0 14.290   O8III 714 0
7 1A 0535-668 HXB 05 35 40.9970566152 -66 51 53.547559416       15.036 15.138 B2IIIe 302 0
8 NAME 30 Dor Nebula SFR 05 38 36.0 -69 05 11           ~ 1276 2
9 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4725 3
10 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 6156 6
11 CXOU J123739.7+114806 X 12 37 39.8 +11 48 06           ~ 1 0
12 CXOU J123740.2+114648 X 12 37 40.3 +11 46 48           ~ 1 0
13 [BWC2008] U28 ULX 12 37 40.30 +11 47 27.5           ~ 4 0
14 CXOU J123740.4+114835 X 12 37 40.4 +11 48 36           ~ 1 0
15 [CHP2004] J123741.9+115005 X 12 37 41.9 +11 50 05           ~ 2 0
16 CXOU J123742.3+114909 X 12 37 42.3 +11 49 09           ~ 1 0
17 CXOU J123742.6+114825 X 12 37 42.6 +11 48 25           ~ 1 0
18 CXOU J123742.7+114945 X 12 37 42.8 +11 49 45           ~ 1 0
19 CXOU J123743.0+114759 X 12 37 43.0 +11 48 00           ~ 1 0
20 [SGT2004] J123743.20+114901.2 X 12 37 43.20 +11 49 01.2           ~ 3 0
21 CXOU J123743.2+114912 X 12 37 43.2 +11 49 13           ~ 1 0
22 M 58 Sy2 12 37 43.59747 +11 49 05.1240 10.80 10.48 9.66     ~ 1140 2
23 [CHP2004] J123743.7+114825 X 12 37 43.7 +11 48 25           ~ 2 0
24 [CHP2004] J123744.1+114917 X 12 37 44.1 +11 49 17           ~ 2 0
25 CXOU J123744.3+114834 X 12 37 44.3 +11 48 35           ~ 1 0
26 [CHP2004] J123744.5+114922 X 12 37 44.5 +11 49 22           ~ 2 0
27 CXOU J123745.3+114818 X 12 37 45.4 +11 48 19           ~ 1 0
28 CXOU J123746.3+114958 X 12 37 46.3 +11 49 59           ~ 1 0
29 CXOU J123746.4+115012 X 12 37 46.5 +11 50 13           ~ 1 0
30 CXOU J123746.8+114831 X 12 37 46.8 +11 48 32           ~ 1 0
31 [CHP2004] J123747.5+115106 X 12 37 47.5 +11 51 06           ~ 2 0
32 [SGT2004] J123753.89+115020.1 X 12 37 53.89 +11 50 20.1           ~ 2 0
33 NGC 4697 GiG 12 48 35.8981498824 -05 48 02.482374564   10.97   9.83   ~ 895 0
34 CXOU J125041.7+410556 X 12 50 41.8 +41 05 56           ~ 1 0
35 [CHP2004] J125047.6+410512 X 12 50 47.6 +41 05 12           ~ 2 0
36 CXOU J125047.7+410707 X 12 50 47.7 +41 07 08           ~ 1 0
37 [CHP2004] J125048.6+410742 X 12 50 48.6 +41 07 42           ~ 3 0
38 CXOU J125048.8+410635 X 12 50 48.8 +41 06 36           ~ 1 0
39 CXOU J125049.9+410640 X 12 50 50.0 +41 06 41           ~ 2 0
40 [CHP2004] J125050.4+410628 X 12 50 50.3 +41 06 28           ~ 2 0
41 [WMR2006] NGC4736 XMM1 X 12 50 50.3 +41 07 12           ~ 11 0
42 [CHP2004] J125050.2+410753 X 12 50 50.3 +41 07 53           ~ 2 0
43 [CHP2004] J125050.8+410738 X 12 50 50.8 +41 07 38           ~ 2 0
44 [CHP2004] J125051.0+410743 X 12 50 51.0 +41 07 43           ~ 2 0
45 [CHP2004] J125051.1+410646 X 12 50 51.14 +41 06 47.3           ~ 2 0
46 CXOU J125052.0+410716 X 12 50 52.1 +41 07 16           ~ 2 1
47 [CHP2004] J125052.1+410655 X 12 50 52.1 +41 06 55           ~ 2 0
48 [CHP2004] J125052.6+410702 X 12 50 52.6 +41 07 02           ~ 3 1
49 [CHP2004] J125052.5+410715 X 12 50 52.6 +41 07 15           ~ 2 0
50 [SST2011] J125052.72+410719.0 UX? 12 50 52.72 +41 07 19.0           ~ 9 0
51 CXOU J125052.9+410745 X 12 50 52.9 +41 07 46           ~ 2 0
52 CXOU J125052.9+410707 X 12 50 53.0 +41 07 07           ~ 2 1
53 M 94 SyG 12 50 53.0737971432 +41 07 12.900884628 9.15 8.96 8.24 7.78   ~ 1476 2
54 [BWC2008] C14 X 12 50 53.1 +41 07 13           ~ 8 0
55 [CHP2004] J125053.3+410700 X 12 50 53.3 +41 07 00           ~ 2 0
56 [CHP2004] J125053.3+410703 X 12 50 53.3 +41 07 03           ~ 2 0
57 [ESC2002] NGC 4736 X-1 ULX 12 50 53.3 +41 07 14           ~ 9 0
58 CXOU J125053.2+410718 X 12 50 53.3 +41 07 18           ~ 1 0
59 [CHP2004] J125053.7+410719 X 12 50 53.7 +41 07 19           ~ 2 0
60 [CHP2004] J125053.8+410713 X 12 50 53.8 +41 07 13           ~ 2 0
61 [CHP2004] J125054.1+410630 X 12 50 54.1 +41 06 30           ~ 3 1
62 [CHP2004] J125054.4+410747 X 12 50 54.4 +41 07 47           ~ 2 0
63 CXOU J125054.5+410636 X 12 50 54.6 +41 06 37           ~ 1 0
64 CXOU J125055.0+410634 X 12 50 55.0 +41 06 34           ~ 1 0
65 [CHP2004] J125055.2+410831 X 12 50 55.2 +41 08 31           ~ 2 0
66 [CHP2004] J125055.7+410719 X 12 50 55.6 +41 07 20           ~ 2 0
67 CXOU J125055.7+410704 X 12 50 55.7 +41 07 05           ~ 1 0
68 [CHP2004] J125056.3+410655 X 12 50 56.3 +41 06 55           ~ 2 0
69 CXOU J125056.8+410705 X 12 50 56.89 +41 07 06.5           ~ 1 0
70 CXOU J125058.4+410813 X 12 50 58.4 +41 08 14           ~ 1 0
71 CXOU J125101.9+410855 X 12 51 02.0 +41 08 56           ~ 1 0
72 CXOU J125104.0+410738 X 12 51 04.1 +41 07 39           ~ 1 0
73 [CHP2004] J125111.1+410850 X 12 51 11.1 +41 08 50           ~ 2 0
74 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 1331 1

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