2015A&A...578A.107M


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.10CET19:30:03

2015A&A...578A.107M - Astronomy and Astrophysics, volume 578A, 107-107 (2015/6-1)

The donor star of the X-ray pulsar X 1908+075.

MARTINEZ-NUNEZ S., SANDER A., GIMENEZ-GARCIA A., GONZALEZ-GALAN A., TORREJON J.M., GONZALEZ-FERNANDEZ C. and HAMANN W.-R.

Abstract (from CDS):

High-mass X-ray binaries consist of a massive donor star and a compact object. While several of those systems have been well studied in X-rays, little is known for most of the donor stars as they are often heavily obscured in the optical and ultraviolet regime. There is an opportunity to observe them at infrared wavelengths, however. The goal of this study is to obtain the stellar and wind parameters of the donor star in the X1908+075 high-mass X-ray binary system with a stellar atmosphere model to check whether previous studies from X-ray observations and spectral morphology lead to a sufficient description of the donor star. We obtained H- and K-band spectra of X1908+075 and analysed them with the Potsdam Wolf-Rayet (PoWR) model atmosphere code. For the first time, we calculated a stellar atmosphere model for the donor star, whose main parameters are: Mspec=15±6M, T*=23–3+6kK, loggeff=3.0±0.2 and logL/L=4.81±0.25. The obtained parameters point towards an early B-type (B0-B3) star, probably in a supergiant phase. Moreover we determined a more accurate distance to the system of 4.85±0.50kpc than the previously reported value.

Abstract Copyright:

Journal keyword(s): binaries: close - stars: individual: X1908+075 - stars: massive - stars: winds, outflows - X-rays: binaries

Simbad objects: 4

goto Full paper

goto View the reference in ADS

Number of rows : 4

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 BD-01 3649B * 19 06 34.89571 -01 20 33.6437   9.81 9.60     A0V 11 0
2 4U 1907+09 HXB 19 09 37.9 +09 49 49   19.41 16.35 14.40 12.53 O8.5Iab 305 1
3 4U 1908+075 HXB 19 10 48.2141670291 +07 35 51.715745251           O7.5-9.5sg 102 0
4 HD 182081 * 19 22 43.1021797408 +07 43 47.454117748   10.14 9.53     G2V 6 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2015A&A...578A.107M and select 'bookmark this link' or equivalent in the popup menu


2019.12.10-19:30:03

© Université de Strasbourg/CNRS

    • Contact