SIMBAD references

2020MNRAS.498.2750C - Mon. Not. R. Astron. Soc., 498, 2750-2756 (2020/October-3)

Swift unveils the orbital period of IGR J18214-1318.

CUSUMANO G., D'AI A., SEGRETO A., LA PAROLA V. and DEL SANTO M.

Abstract (from CDS):

We analysed 13 yr of the Neil Gehrels Swift Observatory survey data collected on the high-mass X-ray binary IGR J18214-1318. Performing the timing analysis, we detected a periodic signal of 5.42 d. From the companion star characteristics, we derived an average orbital separation of ∼41 R☉≃2 R*. The spectral type of the companion star (O9) and the tight orbital separation suggest that IGR J18214-1318 is a wind-accreting source with eccentricity lower than 0.17. The intensity profile folded at the orbital period shows a deep minimum compatible with an eclipse of the source by the companion star. In addition, we report on the broad-band 0.6-100 keV spectrum using data from XMM-Newton, NuSTAR, and Swift, applying self-consistent physical models. We find that the spectrum is well fitted either by a pure thermal Comptonization component, or, assuming that the source is a neutron star accreting above the critical regime, by a combined thermal and bulk motion Comptonization model. In both cases, the presence of a local neutral absorption (possibly related to the thick wind of the companion star) is required.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): X-rays: binaries - X-rays: individual: IGR J18214-1318

Simbad objects: 1

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