A multiwavelength study of SXP 1062, the long-period X-ray pulsar associated with a supernova remnant

DOI: 
10.1093/mnras/stx3127
Publication date: 
01/04/2018
Main author: 
González-Galán, A.
IAA authors: 
Guerrero, M. A.
Authors: 
González-Galán, A.;Oskinova, L. M.;Popov, S. B.;Haberl, F.;Kühnel, M.;Gallagher, J.;Schurch, M. P. E.;Guerrero, M. A.
Journal: 
Monthly Notices of the Royal Astronomical Society
Refereed: 
Yes
Publication type: 
Article
Volume: 
475
Pages: 
2809-2821
Abstract: 
SXP 1062 is a Be X-ray binary (BeXB) located in the Small Magellanic Cloud. It hosts a long-period X-ray pulsar and is likely associated with the supernova remnant MCSNR J0127-7332. In this work we present a multiwavelength view on SXP 1062 in different luminosity regimes. We consider monitoring campaigns in optical (OGLE survey) and X-ray (Swift telescope). During these campaigns a tight coincidence of X-ray and optical outbursts is observed. We interpret this as typical Type I outbursts as often detected in BeXBs at periastron passage of the neutron star (NS). To study different X-ray luminosity regimes in depth, during the source quiescence we observed it with XMM-Newton while Chandra observations followed an X-ray outburst. Nearly simultaneously with Chandra observations in X-rays, in optical the RSS/SALT telescope obtained spectra of SXP 1062. On the basis of our multiwavelength campaign we propose a simple scenario where the disc of the Be star is observed face-on, while the orbit of the NS is inclined with respect to the disc. According to the model of quasi-spherical settling accretion our estimation of the magnetic field of the pulsar in SXP 1062 does not require an extremely strong magnetic field at the present time.
Database: 
ADS
SCOPUS
URL: 
https://ui.adsabs.harvard.edu/#abs/2018MNRAS.475.2809G/abstract
ADS Bibcode: 
2018MNRAS.475.2809G
Keywords: 
stars: neutron;pulsars: individual: SXP 1062;galaxies: individual: Small Magellanic Cloud;X-rays: binaries;Astrophysics - High Energy Astrophysical Phenomena;Astrophysics - Solar and Stellar Astrophysics