2010A&A...516A..94N


Query : 2010A&A...516A..94N

2010A&A...516A..94N - Astronomy and Astrophysics, volume 516, A94-94 (2010/6-3)

K-band spectroscopy of IGR J16358-4726 and IGR J16393-4643: two new symbiotic X-ray binaries.

NESPOLI E., FABREGAT J. and MENNICKENT R.E.

Abstract (from CDS):

Symbiotic X-ray binaries (SyXBs) are a recently discovered subclass of low mass X-ray binaries. Their growing number makes them an important evolutionary channel of X-ray binaries. Our goal is to perform spectral analysis and classification of the proposed counterparts to IGR J16358-4726 and IGR J16393-4643 and establish their nature as X-ray systems. We used the ESO/UT1 ISAAC spectrograph to observe the proposed counterparts to the two sources, obtaining K-band medium resolution spectra (R=500) with a S/N>140. Data reduction was performed with the standard procedure. We classified them by means of comparison with published atlases. We performed SED fitting to refine the spectral classification. The two counterparts clearly exhibit the typical features of late-type stars, notably strong CO absorption bands in the red part of the spectrum. With information from previous X-ray studies, we classify the two systems as two new members of the SyXB class. For IGR J16393-4643, we considered the most probable counterpart to the system, although three other objects cannot be completely discarded. For this system, we compared our findings with available orbital solutions, constraining the orbital parameters and the mass of the companion star. By including two more systems, we increased to eight the number of known SyXBs, which emerges as a non-negligible category of galactic X-ray binaries.

Abstract Copyright:

Journal keyword(s): X-rays: binaries - stars: neutron - stars: individual: IGR J16358-4726 - stars: individual: IGR J16393-4643

Simbad objects: 12

goto Full paper

goto View the references in ADS

Number of rows : 12
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 NAME Nor Arm PoG 16 00 -50.0           ~ 399 0
2 1RXS J161933.6-280736 LXB 16 19 33.3431855736 -28 07 39.901313028   14.523 12.684 12.277 10.072 M2III 44 0
3 2MASS J16355369-4725398 NIR 16 35 53.70 -47 25 39.8           ~ 9 1
4 [KRL2007b] 194 Psr 16 36 30 -47 37.5           Be 79 0
5 2MASS J16390535-4642137 NIR 16 39 05.36 -46 42 13.7           ~ 12 1
6 NAME AX J163904-4642 HXB 16 39 06 -46 42.2           BIV-V 91 1
7 2MASS J16492695-4349090 HXB 16 49 26.95 -43 49 09.0           B0.5Ib 54 0
8 V* V934 Her LP* 17 06 34.5128222328 +23 58 18.639373836 11.20 9.16 7.62     M2III 134 0
9 V* V2116 Oph Sy* 17 32 02.1532435416 -24 44 44.129169096   20.78 18.4     M6IIIe 674 1
10 1RXS J180431.1-273932 X 18 04 31.1 -27 39 32           ~ 16 3
11 X Sct X-1 HXB 18 35 25.8244223112 -07 36 50.416365528           ~ 76 0
12 4U 1954+31 HXB 19 55 42.3383143920 +32 05 49.046285472   12.02 9.97     M4/5III 117 0

To bookmark this query, right click on this link: simbad:objects in 2010A&A...516A..94N and select 'bookmark this link' or equivalent in the popup menu


2023.02.04-19:14:50

© Université de Strasbourg/CNRS

    • Contact