2009ApJ...697.1695A

Query : 2009ApJ...697.1695A

2009ApJ...697.1695A - Astrophys. J., 697, 1695-1716 (2009/June-1)

The Chandra survey of the Small Magellanic Cloud "Bar". II. Optical counterparts of X-ray sources.

ANTONIOU V., ZEZAS A., HATZIDIMITRIOU D. and McDOWELL J.C.

Abstract (from CDS):

We present the most likely optical counterparts of 113 X-ray sources detected in our Chandra survey of the central region of the Small Magellanic Cloud (SMC) based on the OGLE-II and Magellanic Clouds Photometric Survey catalogs. We estimate that the foreground contamination and chance coincidence probability are minimal for the bright optical counterparts (corresponding to OB type stars; 35 in total). We propose here for the first time 13 high-mass X-ray binaries, of which four are Be/X-ray binaries (Be-XRBs), and we confirm the previous classification of 18 Be-XRBs. We estimate that the new candidate Be-XRBs have an age of ∼15-85 Myr, consistent with the age of Be stars. We also examine the "overabundance" of Be-XRBs in the SMC fields covered by Chandra, in comparison with the Galaxy. In luminosities down to ∼1034 erg/s, we find that SMC Be-XRBs are ∼1.5 times more common when compared to the Milky Way even after taking into account the difference in the formation rates of OB stars. This residual excess can be attributed to the lower metallicity of the SMC. Finally, we find that the mixing of Be-XRBs with other than their natal stellar population is not an issue in our comparisons of Be-XRBs and stellar populations in the SMC. Instead, we find indication for variation of the SMC XRB populations on kiloparsec scales, related to local variations of the formation rate of OB stars and slight variation of their age, which results in different relative numbers of Be stars and therefore XRBs.

Abstract Copyright: ∼

Journal keyword(s): Magellanic Clouds - pulsars: general - stars: early-type - stars: emission-line, Be - stars: formation - X-rays: binaries

VizieR on-line data: <Available at CDS (J/ApJ/697/1695): table2.dat table4.dat table7.dat refs.dat notes.dat>

Simbad objects: 79

goto Full paper

goto View the references in ADS

Number of rows : 79
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 MQS J004736.12-724538.2 QSO 00 47 36.1489084440 -72 45 38.138513868     21.77   20.15 ~ 6 0
2 SXP 25.5 HXB 00 48 14.1209478096 -73 10 03.933642936 15.06 15.56 15.847   15.693 B1.5e 28 1
3 MQS J004818.65-732100.1 QSO 00 48 18.6544401408 -73 21 00.134221356   16.43 16.57   16.69 ~ 10 0
4 XMMU J004830.1-724900 AG? 00 48 30.144 -72 49 00.89           ~ 2 0
5 XMMU J004832.9-732354 AG? 00 48 32.984 -73 23 54.48           ~ 2 0
6 XMMU J004842.5-724656 X 00 48 42.550 -72 46 56.88           ~ 3 0
7 S3MC J004853.39-732457.31 Y*? 00 48 53.40 -73 24 57.4         17.19 ~ 6 0
8 RX J0049.0-7250 HXB 00 49 03.35 -72 50 52.4   17.01 16.898   16.686 B3:V 51 0
9 [SG2005] SMC 47 HXB 00 49 05.4 -73 14 10     18.0     ~ 2 0
10 XMMU J004911.5-731717 * 00 49 10.8828127497 -73 17 17.571902709           ~ 3 1
11 RX J0049.2-7311 HXB 00 49 13.6255324536 -73 11 37.869710892   16.52 16.555   16.320 B1e 46 1
12 XMMU J004916.8-723943 AG? 00 49 16.824 -72 39 43.66           ~ 2 0
13 XMMU J004926.9-731212 AG? 00 49 26.998 -73 12 12.11           ~ 2 0
14 [MA93] 300 HXB 00 49 29.848 -73 10 58.33 15.36 15.85 16.249 15.38 15.950 B1e 23 1
15 XMMU J004932.4-723924 AG? 00 49 32.443 -72 39 24.72           ~ 2 0
16 XMMU J004934.6-724106 AG? 00 49 34.674 -72 41 06.93           ~ 2 0
17 LIN 139 HXB 00 49 42.0078068952 -73 23 14.676382752 14.09 15.00 14.98   14.70 O9.5-B0.5III-V 73 0
18 UCAC4 086-001985 * 00 49 42.048 -72 48 43.70   13.89 13.97     ~ 2 0
19 2MASS J00494423-7252088 AG? 00 49 44.23 -72 52 08.8           ~ 6 0
20 OGLE SMC100.5 55472 QSO 00 49 44.41 -72 54 00.5     21.27   20.12 ~ 4 0
21 XMMU J004948.3-732211 AG? 00 49 48.317 -73 22 11.06           ~ 3 0
22 XMMU J004951.0-732501 X 00 49 51.093 -73 25 01.59           ~ 2 0
23 XMMU J004955.8-724222 AG? 00 49 55.800 -72 42 22.60           ~ 2 0
24 XMMU J004956.9-732516 AG? 00 49 56.998 -73 25 16.60           ~ 2 0
25 XMMU J004957.1-731653 X 00 49 57.115 -73 16 53.77           ~ 2 0
26 [SHP2000] SMC 31 AG? 00 50 00.028 -72 49 29.07           ~ 4 0
27 XMMU J005005.1-731146 AG? 00 50 05.176 -73 11 46.23           ~ 2 0
28 XMMU J005034.8-724037 AG? 00 50 34.808 -72 40 37.64           ~ 2 0
29 V* DZ Tuc HXB 00 50 44.7079466208 -73 16 05.430164196 14.46 15.37 15.396   15.225 B0-B0.5V 76 0
30 SXP 292 HXB 00 50 47.9893238880 -73 18 18.049820796   15.352 15.380 15.30 15.231 B0 14 0
31 SkKM 62 s*y 00 50 49.5884970576 -72 41 54.064858848 15.97 14.77 13.38   11.86 G8.5Ia-Iab 13 0
32 XMMU J005055.2-731803 AG? 00 50 55.229 -73 18 03.11           ~ 2 0
33 [MA93] 414 HXB 00 50 57.1198007064 -73 10 08.171604840   14.43 14.522   14.403 B0.5e 25 0
34 XMMU J005110.3-731335 X 00 51 10.388 -73 13 35.59           ~ 2 0
35 XMMU J005145.2-722151 AG? 00 51 45.212 -72 21 51.73           ~ 2 0
36 AzV 102 HXB 00 51 53.1358981896 -72 31 48.721904580 13.66 14.79 14.38   14.40 B0-5(II) 71 0
37 MQS J005203.27-723830.6 QSO 00 52 03.27 -72 38 30.6     20.80   19.90 ~ 4 0
38 LIN 198 HXB 00 52 05.6251611744 -72 26 04.228773036 13.86 14.91 14.927 14.91 14.794 B0-5(II)e 165 0
39 SXP 82.4 HXB 00 52 08.9591015832 -72 38 03.307691544 14.33 15.15 15.23   14.83 B1-5(II)e 37 0
40 XMMU J005210.3-724357 AG? 00 52 10.369 -72 43 57.30           ~ 2 0
41 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 11142 1
42 XMMU J005239.8-724245 X 00 52 39.882 -72 42 45.28           ~ 2 0
43 XMMU J005242.0-724720 AG? 00 52 42.092 -72 47 20.20           ~ 2 0
44 CXOU J005245.0-722844 HXB 00 52 45.0973434864 -72 28 43.786264152   14.55 14.936   14.847 O9/B0e 8 0
45 XMMU J005245.5-724917 AG? 00 52 45.566 -72 49 17.37           ~ 2 0
46 AzV 138 HXB 00 52 52.3001881056 -72 48 30.214927584 13.35 14.32 14.37   14.24 O2((f))+OBe 26 0
47 OGLE SMC101.1 53779 QSO 00 52 59.10 -72 45 10.9     20.80   20.33 ~ 4 0
48 XMMU J005315.8-724849 AG? 00 53 15.894 -72 48 49.07           ~ 2 0
49 RX J0053.4-7227 HXB 00 53 23.8589408040 -72 27 15.445929456 15.06 16.11 16.202   16.125 B1-B2IV-V 31 0
50 XMMU J005332.1-724314 AG? 00 53 32.105 -72 43 14.58           ~ 2 0
51 2MASS J00533785-7224088 AG? 00 53 37.858 -72 24 08.88           ~ 2 0
52 XMMU J005338.9-724716 AG? 00 53 38.912 -72 47 16.01           ~ 2 0
53 XMMU J005351.1-721816 AG? 00 53 51.179 -72 18 16.32           ~ 2 0
54 XMMU J005351.3-722122 AG? 00 53 51.310 -72 21 22.38           ~ 2 0
55 RX J0053.9-7226 HXB 00 53 55.181 -72 26 44.88   14.65 14.72   14.757 B1III 93 0
56 SSTISAGE1C J005358.25-722614.7 HXB 00 53 58.43 -72 26 14.4   17.65 17.806   17.997 B2V 5 0
57 SXP 342 HXB 00 54 03.8561131320 -72 26 32.965087524 13.82 14.95 14.94 14.80 14.79 ~ 19 0
58 LHA 115-S 18 LP* 00 54 09.5410003368 -72 41 43.289017440 12.94 13.48 13.82   12.55 B[e] 82 0
59 XMMU J005411.5-723511 AG? 00 54 11.585 -72 35 11.46           ~ 2 0
60 XMMU J005422.0-724532 AG? 00 54 22.090 -72 45 32.12           ~ 2 0
61 OGLE SMC-SC6 2357-2358 PM* 00 54 28.6832940360 -72 31 06.729500928   21.112 19.486   16.438 ~ 7 1
62 XMMU J005438.4-722208 AG? 00 54 38.466 -72 22 08.64           ~ 2 0
63 XMMU J005445.2-722357 AG? 00 54 45.236 -72 23 57.69           ~ 2 0
64 [MA93] 798 HXB 00 54 46.3702539288 -72 25 22.795778784 14.39 15.50 15.569   15.346 B1e 26 0
65 [VV2006] J005449.0-722544 QSO 00 54 49.052 -72 25 43.91   19.178 19.001   18.264 ~ 6 0
66 XMMU J005451.2-722630 AG? 00 54 51.258 -72 26 30.06           ~ 3 0
67 LIN 268 HXB 00 54 55.8845128080 -72 45 10.958407380 13.83 14.73 15.003 14.73 14.784 B1e 49 0
68 [MA93] 810 HXB 00 54 56.1754603176 -72 26 47.859057060 14.17 15.24 15.28   15.327 O9V 72 0
69 XMMU J005504.2-722231 AG? 00 55 04.224 -72 22 31.21           ~ 3 0
70 RX J0055.4-7210 HXB 00 55 27.746 -72 10 58.74           ~ 32 2
71 [MA93] 904 HXB 00 56 05.5347974352 -72 21 59.452153740   15.84 15.88   15.494 B1V 33 0
72 XMMU J005652.4-721203 AG? 00 56 52.5707872080 -72 12 03.840933024           ~ 2 0
73 XMMU J005713.4-722357 AG? 00 57 13.434 -72 23 57.80           ~ 2 0
74 2XMM J005719.6-722534 AGN 00 57 19.8204204888 -72 25 34.069228428           ~ 5 0
75 XMMU J005722.7-721757 AG? 00 57 22.768 -72 17 57.13           ~ 3 0
76 2dFS 1224 HXB 00 57 23.9556115104 -72 23 56.636867472 13.60 14.64 14.771   14.92 B1.5e 14 1
77 2E 238 AG? 00 57 32.7654620568 -72 13 02.183006892   15.4       ~ 15 0
78 [MA93] 1020 HXB 00 57 36.0162576624 -72 19 34.056483744 14.89 15.95 16.008 15.79 15.806 B0/4e 42 0
79 NAME SMC Bar PoG 01 05 -72.6           ~ 235 0

To bookmark this query, right click on this link: simbad:objects in 2009ApJ...697.1695A and select 'bookmark this link' or equivalent in the popup menu