Variable infrared radiation from X-ray sources 4U 0115 + 634 and A 0535 + 262

Details Variable infrared radiation from X-ray sources 4U 0115 + 634 and A 0535 + 262 Variable infrared radiation from X-ray sources 4U 0115 + 634 and A 0535 + 262

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ap%26ss..93..207g&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 93, no. 1, June 1983, p. 207-211.

Astronomy and Astrophysics

Astrophysics

11

Binary Stars, Infrared Radiation, X Ray Sources, Astronomical Photometry, Neutron Stars, Nonthermal Radiation, Periodic Variations, Stellar Mass Accretion, Ubv Spectra, X Ray Binaries

Scientific paper

Observations of X-ray binaries 4U 0115+634 and A 0535+262 performed in 1981-1982 revealed a significant IR variability of these sources. 4U 0115+634 was observed twice in the periods close to high and low levels of X-ray activity, thus changing from K = 7m.75 to K > 9m. A 0535+262 (K ≈ 6m) showed temporal variations ranging from tens of minutes to some days. The regular variations of IR brightness are suspected in the period close to 104 s, which corresponds to the period of axial rotation of a neutron star in A 0535+262. The results obtained present arguments in favour of the hypothesis that IR radiation is generated near the accreting neutron star and is possible of a maser nature.

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