Long-term variability in low-mass X-ray binaries - A study using data from VELA 5B

Details Long-term variability in low-mass X-ray binaries - A study using data from VELA 5B Long-term variability in low-mass X-ray binaries - A study using data from VELA 5B

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...395..582s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 395, no. 2, Aug. 20, 1992, p. 582-591. Research supported by DOE.

Astronomy and Astrophysics

Astrophysics

46

Fourier Analysis, Light Curve, Variable Stars, X Ray Binaries, Accretion Disks, Power Spectra, Stellar Mass

Scientific paper

A complete sample of low-mass X-ray binaries in uncrowded fields obtained from Vela 5B is studied here for periodic and aperiodic time variability on time scales of more than one day. The strong 176-day periodicity in X1820 - 303 is confirmed, and evidence is found for a significant 77-day period in Cyg X-2 and for variability on time scales of less than about 200 days in Cyg X-3. Limits are set on the possible amplitude of candidate periodicities in the literature for Ser X-1 and X0614 + 091. The evidence reported here suggests that while long-term cyclic variability is common among high-mass binaries, it is a rare occurrence in low-mass systems.

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