The 1 - 50 keV spectral and timing analysis of IGR J18027-2016: an eclipsing, high mass X-ray binary
arXiv:astro-ph/0505078 · doi:10.1051/0004-6361:20052937
Abstract
We report the association of the INTEGRAL source IGR J18027-2016 with the BeppoSAX source SAX J1802.7-2017. IGR J18027-2016 is seen to be a weak, persistent source by the IBIS/ISGRI instrument on board INTEGRAL with an average source count rate of 0.55 counts s^-1 (~6.1 mCrab) in the 20-40 keV band. Timing analysis performed on the ISGRI data identifies an orbital period of 4.5696 +/- 0.0009 days and gives an ephemeris of mid-eclipse as, T{mid} = 52931.37 +/- 0.04 MJD. Re-analysis of archival BeppoSAX data has provided a mass function for the donor star, f(m) = 16 +/- 1 M{sun} and a projected semimajor axis of a{x}sin{i} = 68 +/- 1 lt-s. We conclude that the donor is an OB-supergiant with a mass of 18.8-29.3 M{sun} and a radius of 15.0-23.4 R{sun}. Spectra obtained by XMM-Newton and ISGRI indicate a high hydrogen column density of NH = 6.8 x 10^22 cm^-2, which suggests intrinsic absorption. The source appears to be a high mass X-ray binary with the neutron star emitting X-rays through wind-fed accretion while in an eclipsing orbit around an OB-supergiant.
Accepted for Publication in A&A. 9 pages, 10 figures. Figure 10 has been compressed, lowering the image quality
Cited by in corpus (18)
- The ephemeris, orbital decay, and masses of 10 eclipsing HMXBs
- Probing clumpy stellar winds with a neutron star
- Multi-wavelength observations of Galactic hard X-ray sources discovered by INTEGRAL. I. The nature of the companion star
- Unveiling the nature of INTEGRAL objects through optical spectroscopy. VI. A multi-observatory identification campaign
- A catalogue of high-mass X-ray binaries in the Galaxy: from the INTEGRAL to the Gaia era
- IGR J18483-0311: an accreting X-ray pulsar observed by INTEGRAL
- X-ray irradiation of the winds in binaries with massive components
- Supergiant fast X-ray transients as an under-luminous class of supergiant X-ray binaries
- NuSTAR observations of the supergiant X-ray pulsar IGR J18027-2016: accretion from the stellar wind and possible cyclotron absorption line
- A Suzaku view of IGR J16393-4643
- An unexpected outburst from A0535+262
- Catalog of the Galactic population of X-ray pulsars in High-mass X-ray binary systems
- Probing the nature of IGR J16493-4348: Spectral and temporal analysis of the 1-100 keV emission
- Multi-wavelength observations of the Be/X-ray binary IGR J01217-7257 (=SXP 2.16) during outburst
- X-ray irradiation of the stellar wind in HMXBs with B supergiants: Implications for ULXs
- Stellar wind structures in the eclipsing binary system IGR J18027-2016
- Variability study of the High Mass X-ray Binary IGR J18027--2016 with {\it Swift}--XRT
- The first X-ray spectrum of the HMXB XTE J1855-026 during the compact object eclipse