Cygnus X-3: The recent X-ray period measurements and gamma-ray astronomy

Details Cygnus X-3: The recent X-ray period measurements and gamma-ray astronomy Cygnus X-3: The recent X-ray period measurements and gamma-ray astronomy

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990nuphs..14..107v&link_type=abstract

Nuclear Physics B Proceedings Supplements, Volume 14, Issue 2, p. 107-115.

Physics

Nuclear Physics

1

Scientific paper

Our knowledge about the nature of Cyg X-3 is briefly reviewed, with particular emphasis on the lack of observational basis for some common assumptions about the object. Some consequences for gamma-ray astronomy are considered of the X-ray period measurements with EXOSAT, which indicate the presence of a large second period-derivative. If the orbital period variations are due to apsidal motion, then the gamma-ray ephemeris is predicted to differ from the X-ray ephemeris, with variable phase shifts of up to ~0.16, and in most models the peak separation in double-peaked gamma-ray light curves is also predicted to vary, by a similar amount.

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