2001A&A...371..816K

Query : 2001A&A...371..816K

2001A&A...371..816K - Astronomy and Astrophysics, volume 371816-832 (2001/6-1)

ROSAT X-ray sources in the field of the LMC. I. Total LMC gas from the background AGN spectral fits.

KAHABKA P., DE BOER K.S. and BRUENS C.

Abstract (from CDS):

We analyzed a sample of 26 background X-ray sources in a ∼60 square degree field of the Large Magellanic Cloud observed with the ROSAT PSPC. The sample has been selected from previously classified and optically identified X-ray sources. In addition, pointlike and spectrally hard sources with at least 100 to 200 observed counts have been used for the analysis. We performed X-ray spectral fitting and derived total hydrogen absorbing column densities due to LMC gas in the range (1020-2x1021)cm–2. We compared these columns with the HI columns derived from a 21-cm Parkes survey of the LMC. For 7 optically identified sources we find, within the uncertainties derived from the X-ray spectral fit, agreement for both columns. For a further 19 sources, we constrain the LMC columns from the X-ray spectral fit assuming that the power law photon index is that of AGN type spectra. We derive for 20 sources gas columns which are within the uncertainties, in agreement with the HI columns. We derive for two background sources (RX J0536.9-6913 and RX J0547.0-7040) hydrogen absorbing column densities due to LMC gas, which are in excess compared to the HI columns. These sources - located in regions of large (∼3x1021cm–2) LMC HI column densities - could be seen through additional gas which may be warm and diffuse, cold or molecular. For 10 sources we derive upper limits for the gas columns additional to HI and constrain the molecular mass fraction to <(30-140)%.

Abstract Copyright: ∼

Journal keyword(s): galaxies: individual: LMC - galaxies: active - galaxies: ISM - radio continuum: galaxies - X-rays: galaxies

Simbad objects: 50

goto Full paper

goto View the references in ADS

Number of rows : 50
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 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
2 RX J0436.2-6822 X 04 36 12.5 -68 22 36           ~ 5 0
3 2MASS J04541083-6643167 Sy1 04 54 10.8388531728 -66 43 16.500438192 17.262 18.080 17.88 17.250 16.97 ~ 11 0
4 6dFGS gJ050304.0-663346 Sy1 05 03 03.968 -66 33 45.60   13.9   14.5   ~ 43 0
5 LEDA 3095714 Sy1 05 09 15.3760431624 -69 54 17.308029168 16.723 18.454 17.345   16.505 ~ 17 0
6 RX J0510.4-6737 X 05 10 29.1 -67 37 40           ~ 5 0
7 GH 7-19 G 05 15 05 -65 11.4     12.8     ~ 2 0
8 RX J0515.1-6511 X 05 15 10.9 -65 11 31           ~ 2 0
9 GH 7-20 G 05 15.2 -65 12     16.3     ~ 2 0
10 ICRF J051637.7-723707 QSO 05 16 37.71905215 -72 37 07.4656674           ~ 36 1
11 RX J0516.6-7237 X 05 16 37.9 -72 37 01           ~ 3 0
12 2E 1250 Sy1 05 17 16.950 -70 44 02.00 19.033 19.631 18.96   18.25 ~ 22 0
13 HD 35324 PM* 05 17 25.8446392416 -71 31 59.284587108   9.06 7.72     K2IIICNII 26 0
14 RX J0522.7-6928 X 05 22 46.9 -69 28 34           ~ 4 0
15 RX J0523.2-7015 X 05 23 12.8 -70 15 21           ~ 4 0
16 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
17 LEDA 88408 Sy1 05 24 02.262 -70 11 08.63 17.553 18.316 18.27 17.550 17.23 ~ 30 0
18 RX J0528.8-6539 BLL 05 28 47.25363 -65 39 54.3642 19.150 19.870 19.193   18.903 ~ 11 0
19 RX J0529.0-6603 X 05 29 00.6 -66 03 04           ~ 3 0
20 RX J0530.1-6551 X 05 30 10.6000 -65 51 26.994           ~ 12 1
21 2E 1337 Q? 05 31 31.610 -71 29 47.00 19.055 19.912 19.571   18.122 ~ 21 0
22 NAME LMC 4 Supergiant Shell sh 05 31 33 -66 40.5           ~ 183 0
23 LEDA 3095722 Sy1 05 31 59.6922545184 -69 19 51.461379588   18.9 18.96   18.18 ~ 19 0
24 2MASX J05322273-6406560 G 05 32 22.73807 -64 06 56.0520           ~ 5 0
25 IRAS F05322-6409 IR 05 32 31.9 -64 07 12           ~ 3 0
26 ESO 56-154 G 05 33 59.2832742768 -71 45 24.786193212 17.317 14.01 15.201 13.08 12.939 ~ 18 0
27 RX J0534.1-7018 X 05 34 08.2 -70 18 58           ~ 4 0
28 RX J0534.1-7037 X 05 34 08.25 -70 37 17.3           ~ 4 0
29 RX J0534.7-6739 Sy1 05 34 44.7853233960 -67 38 54.873501360 17.480 18.310 17.372   16.625 ~ 20 0
30 2XMM J053600.4-704127 Sy1 05 36 00.480 -70 41 27.70     19.41   18.43 ~ 17 0
31 RX J0536.9-6913 X 05 36 57.8 -69 13 26           ~ 6 1
32 NGC 2060 SNR 05 37 51.4466169456 -69 10 23.947092084   9.69 9.59     ~ 380 2
33 RMC 136 Cl* 05 38 42.396 -69 06 03.36   5.81 5.40     ~ 2236 2
34 2MASS J05402713-6241039 AG? 05 40 27.1346191944 -62 41 04.059933720           ~ 5 0
35 RX J0541.6-6511 X 05 41 39.1 -65 11 16           ~ 4 0
36 [VV98] J054641.8-641522 Bla 05 46 41.8381012440 -64 15 21.934341504     18.00 15.33   ~ 54 1
37 RX J0546.9-6851 Bla 05 46 55.20979 -68 51 34.8903           ~ 13 0
38 RX J0547.0-7040 X 05 47 05.57 -70 40 38.6           ~ 3 0
39 LMC-BM 42-26 C* 05 47 07.1312944416 -70 40 26.829424848         14.032 C 9 0
40 2E 1571 BLL 05 47 45.1498948485 -67 45 05.091266853   20.2 20.2     ~ 25 1
41 RX J0548.4-7112 X 05 48 28.7 -71 12 41           ~ 4 0
42 MACHO 28.11400.609 SyG 05 50 31.030 -71 09 57.10   19.9 19.65   19.24 ~ 16 0
43 RX J0550.6-6637 Sy1 05 50 33.5027826816 -66 36 52.665001344   17.0 17.0   19.229 ~ 23 0
44 2MASS J05522451-6402108 Sy1 05 52 24.5023213488 -64 02 10.757771160     15.04     ~ 55 1
45 ICRF J060111.2-703608 Bla 06 01 11.2488493488 -70 36 08.802829692           ~ 117 2
46 LEDA 89499 Sy2 06 02 53.95560 -71 03 10.1448   15.6       ~ 107 1
47 RX J0603.3-7043 X 06 03 22.2 -70 43 58           ~ 3 0
48 PMN J0606-7041 Rad 06 06 05 -70 41.8           ~ 4 0
49 RX J060740-66516 X 06 07 40 -66 51.6           ~ 3 0
50 RX J0607.6-6651 X 06 07 41.0 -66 51 37           ~ 3 0

To bookmark this query, right click on this link: simbad:objects in 2001A&A...371..816K and select 'bookmark this link' or equivalent in the popup menu