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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Long-term evolution of the neutron-star spin period of SXP 1062
Astronomy and Astrophysics, Volume 556, Article A139, Year 2013
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Description
Context. The Be/X-ray binary SXP 1062 is of especial interest owing to the large spin period of the neutron star, its large spin-down rate, and the association with a supernova remnant constraining its age. This makes the source an important probe for accretion physics. Aims. To investigate the long-term evolution of the spin period and associated spectral variations, we performed an XMM-Newton target-of-opportunity observation of SXP 1062 during X-ray outburst. Methods. Spectral and timing analysis of the XMM-Newton data was compared with previous studies, as well as complementary Swift/XRT monitoring and optical spectroscopy with the SALT telescope were obtained. Results. The spin period was measured to be Ps = (1071.01 ± 0.16) s on 2012 Oct. 14. The X-ray spectrum is similar to that of previous observations. No convincing cyclotron absorption features, which could be indicative for a high magnetic field strength, are found. The high-resolution RGS spectra indicate the presence of emission lines, which may not completely be accounted for by the SNR emission. The comparison of multi-epoch optical spectra suggest an increasing size or density of the decretion disc around the Be star. Conclusions. SXP 1062 showed a net spin-down with an average of á-s = (2.27 ± 0.44) s yr-1 over a baseline of 915 days. © ESO, 2013.
Authors & Co-Authors
Sturm, Richard
Germany, Garching Bei Munchen
Max Planck Institute for Extraterrestrial Physics
Haberl, Frank W.
Germany, Garching Bei Munchen
Max Planck Institute for Extraterrestrial Physics
Oskinova, Lidia M.
Germany, Potsdam
Universität Potsdam
Schurch, Matthew P.E.
South Africa, Cape Town
University of Cape Town
Hénault-Brunet, Vincent
United Kingdom, Edinburgh
University of Edinburgh, Institute for Astronomy
Gallagher, John S.
United States, Madison
University of Wisconsin-madison
Udalski, Andrzej
Poland, Warsaw
University of Warsaw
Statistics
Citations: 13
Authors: 7
Affiliations: 6
Identifiers
Doi:
10.1051/0004-6361/201321755
ISSN:
00046361
e-ISSN:
14320746
Research Areas
Environmental