2010A&A...510A..61T


Query : 2010A&A...510A..61T

2010A&A...510A..61T - Astronomy and Astrophysics, volume 510, A61-61 (2010/2-1)

Near-infrared survey of high mass X-ray binary candidates.

TORREJON J.M., NEGUERUELA I., SMITH D.M. and HARRISON T.E.

Abstract (from CDS):

The INTEGRAL satellite is detecting a large population of new X-ray sources that were missed by previous missions because of high obscuration and, in some cases, very short duty cycles. The nature of these sources must be addressed by characterizing their optical and/or infrared counterparts. We investigate the nature of the optical counterparts to five of these newly discovered X-ray sources. We combine infrared spectra in the I, J,H, and K bands with JHK photometry to characterize the spectral type, luminosity class, and distance to the infrared counterparts to these systems. For IGR J19140+0951, we present spectroscopy from the red to the K band and new red and infrared photometry. For SAX J18186-1703 and IGR J18483-0311, we present the first intermediate-resolution spectroscopy to be published. Finally, for IGR J18027-2016, we present new I and K band spectra. We find that four systems harbour early-type B supergiants. All of them are heavily obscured, with E(B-V) ranging between 3 and 5, implying visual extinctions of ∼ 9 to 15mag. We refine the published classifications of IGR J18027-2016 and IGR J19140+0951 by constraining their luminosity class. In the first case, we confirm the supergiant nature but exclude a class III. In the second case, we propose a slightly higher luminosity class (Ia instead of Iab) and provide an improved value of the distance based on new optical photometry. Two other systems, SAX J18186-1703 and IGR J18483-0311 are classified as supergiant fast X-ray transients (SFXTs). XTE J1901+014, on the other hand, contains no bright infrared source in its error circle. Owing to their infrared and X-ray characteristics, IGR J18027-2016 and IGR J19140+0951, emerge as supergiant X-ray binaries with X-ray luminosities of the order of LX~[1-2]x1036erg/s, while SAX J1818.6-1703 and IGR J18483-0311, are found to be SFXTs at 2 and 3kpc, respectively. Finally, XTE J1901+014 emerges as a puzzling source: its X-ray behaviour is strongly reminiscent of SFXTs, but a supergiant nature is firmly excluded for the counterpart. We discuss several alternative scenarios to explain its behaviour.

Abstract Copyright:

Journal keyword(s): binaries: close - supergiants - infrared: stars - X-rays: binaries

Simbad objects: 17

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Number of rows : 17
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 NAME Per Arm PoG 03 30 +45.0           ~ 1512 0
2 RX J0535.6-6651 HXB 05 35 40.9970566152 -66 51 53.547559416   13.7 13.8     B0.5IIIe 286 0
3 HD 74194 HXB 08 40 47.7915253032 -45 03 30.235569624 7.05 7.77 7.55 8.70   O8.5Ib-II(f)p 209 0
4 NAME Nor Arm PoG 16 00 -50.0           ~ 428 0
5 HD 150698 PM* 16 43 51.4343921640 -26 48 32.196563712   7.38 6.71     G2/3V 58 0
6 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14383 0
7 SAX J1802.7-2017 HXB 18 02 41.9407199832 -20 17 17.312648064   17.4 16.4     BIII 88 0
8 SAX J1818.6-1703 HXB 18 18 37.8984077808 -17 02 47.967846180           OBI 104 0
9 IGR J18483-0311 HXB 18 48 17.2064716656 -03 10 16.865225040 23.702 25.162 21.884 17.888 15.88 OBIII 125 0
10 NAME Sgr Arm PoG 19 00 -30.0           ~ 637 1
11 XTE J1901+014 XB* 19 01 40.2 +01 26 31           ~ 60 1
12 UCAC2 35271204 * 19 14 04.1618316264 +09 52 53.946783840           ~ 2 0
13 IGR J19140+0951 HXB 19 14 04.2271468632 +09 52 58.399995144   18.6 16.4     B1Iab 103 0
14 NAME Outer Arm PoG 21 48 +69.4           ~ 316 0
15 NAME Local Arm reg ~ ~           ~ 536 0
16 NAME Galactic Bulge reg ~ ~           ~ 4290 0
17 NAME Galactic Bar reg ~ ~           ~ 1215 0

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