2007ApJ...655..163W


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.14CEST14:05:32

2007ApJ...655..163W - Astrophys. J., 655, 163-178 (2007/January-3)

Elemental abundances of nearby galaxies through high signal-to-noise ratio XMM-Newton observations of ultraluminous X-ray sources.

WINTER L.M., MUSHOTZKY R.F. and REYNOLDS C.S.

Abstract (from CDS):

In this paper we examined XMM-Newton EPIC spectra of 14 ultraluminous X-ray sources (ULXs) in addition to the XMM-Newton RGS spectra of two sources (Holmberg II X-1 and Holmberg IX X-1). We determined oxygen and iron abundances of the host galaxy's ISM using K-shell (O) and L-shell (Fe) X-ray photoionization edges toward these ULXs. We found that the oxygen abundances closely matched recent solar abundances for all of our sources, implying that ULXs live in similar local environments despite the wide range of galaxy host properties. Also, we compare the X-ray hydrogen column densities (nH) for eight ULXs with column densities obtained from radio H I observations. The X-ray model nHvalues are in good agreement with the H I nHvalues, implying that the hydrogen absorption toward the ULXs is not local to the source (with the exception of the source M81 XMM1). In order to obtain the column density and abundance values, we fitted the X-ray spectra of the ULXs with a combined power law and one of several accretion disk models. We tested the abundances obtained from the XSPEC models \typ bbody, \typ diskbb, \typ grad, and \typ diskpn along with a power law, finding that the abundances were independent of the thermal model used. We comment on the physical implications of these different model fits. We also note that very deep observations allow a breaking of the degeneracy noted by Stobbart and coworkers favoring a high-mass solution for the absorbed \typ grad+power-law model.

Abstract Copyright:

Journal keyword(s): ISM: Abundances - ISM: General - X-Rays: ISM

Simbad objects: 30

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Number of rows : 30

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 [LB2005] NGC 247 X2 X 00 47 04.00 -20 47 45.7           ~ 20 0
2 NGC 247 LSB 00 47 08.554 -20 45 37.44 10.11 9.61 9.10 8.87   ~ 383 2
3 RX J004722.4-252051 ULX 00 47 22.59 -25 20 50.9           ~ 36 0
4 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3013 2
5 NGC 300 GiG 00 54 53.4460065856 -37 41 03.182962667 8.83 8.69 8.13 7.46   ~ 1354 2
6 NAME NGC 300 X-1 HXB 00 55 09.990 -37 42 12.16     22.44     WNE 104 1
7 ChASeM33 J013350.89+303936.6 SNR 01 33 50.90 +30 39 36.6           ~ 87 1
8 M 33 GiG 01 33 50.904 +30 39 35.79 6.17 6.27 5.72     ~ 5278 1
9 NGC 1313 G 03 18 16.046 -66 29 53.74   10.06 10.0 9.40 10.4 ~ 623 2
10 2E 756 ULX 03 18 22.00 -66 36 04.3   23.5 23.6     O9.5 204 3
11 NGC 2403 AGN 07 36 51.396 +65 36 09.17 9.31 8.84 8.38 8.19   ~ 1644 1
12 UGC 4305 IG 08 19 04.9878269182 +70 43 13.025604473 12.06 11.72 11.39 11.11   ~ 710 2
13 [SST2011] J081929.00+704219.3 ULX 08 19 28.99 +70 42 19.4           ~ 159 2
14 [FK2005] 7 SNR 09 55 32.95 +69 00 33.6   23.87 23.89     ~ 80 1
15 M 81 Sy2 09 55 33.17306143 +69 03 55.0609270   7.89 6.94     ~ 4055 5
16 UGC 5336 G 09 57 32.1 +69 02 46 15.19 15.15 14.10 14.12   ~ 294 4
17 RX J0957.9+6903 ULX 09 57 53.290 +69 03 48.20           ~ 205 4
18 NGC 3783 Sy1 11 39 01.7095761008 -37 44 19.008597647   12.46 13.43 11.33 12.1 ~ 1502 0
19 RX J123551+27561 ULX 12 35 51.71 +27 56 04.1           ~ 61 1
20 NGC 4559 H2G 12 35 57.6399424116 +27 57 35.859639262   10.46 10.01     ~ 551 1
21 RX J123558+27577 UX? 12 35 58.56 +27 57 41.9           ~ 36 2
22 [SST2011] J124155.56+323216.9 HXB 12 41 55.56 +32 32 16.9           ~ 22 2
23 NGC 4631 GiP 12 42 08.009 +32 32 29.44   9.78 9.19 9.10   ~ 994 2
24 NGC 5204 LSB 13 29 36.508 +58 25 07.43   11.84   11.37   ~ 428 0
25 [FK2005] 23 ULX 13 29 38.62 +58 25 05.6           ~ 111 2
26 ESO 383-35 Sy1 13 35 53.7686909139 -34 17 44.139127597   13.89 13.61 8.9   ~ 1400 0
27 M 83 SBG 13 37 00.919 -29 51 56.74 8.85 8.11 7.52 7.21   ~ 2296 2
28 RX J133719-29536 ULX 13 37 20.12 -29 53 47.7           ~ 23 2
29 [FK2005] 25 ULX 14 03 19.63 -41 22 58.7           ~ 201 0
30 NGC 5408 EmG 14 03 20.907 -41 22 39.75   12.59   11.96 12.2 ~ 321 3

    Equat.    Gal    SGal    Ecl

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