A study on the long term periodicities among the X-ray binaries: Two new superorbital periods

Ozdemir S.

ASTRONOMISCHE NACHRICHTEN, vol.331, no.3, pp.300-303, 2010 (SCI-Expanded, Scopus) identifier identifier

  • Publication Type: Article / Article
  • Volume: 331 Issue: 3
  • Publication Date: 2010
  • Doi Number: 10.1002/asna.200911287
  • Journal Name: ASTRONOMISCHE NACHRICHTEN
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.300-303
  • Keywords: X-rays: binaries, X-rays: individuals (GX354-0, X Persei), WARPED ACCRETION DISCS, ALL-SKY MONITOR, 35 DAY CYCLE, CYGNUS X-1, ORBITAL MODULATION, 4TH EDITION, 4U 1820-30, VARIABILITY, CATALOG, LMC
  • Ankara University Affiliated: Yes

Abstract

Long term behaviours of a few selected X-ray binaries are studied on the basis of RXTE/ASM archive covering a period of similar to 13 years of continuous X-ray data. Two new superorbital periods seem to be revealed for the GX354-0 and X Persei systems as 8.7 years and 345 days, respectively. Although the X Persei system has two strongest peaks in its power density spectrum at 15.7 years and at 345 days, the latter is much more plausible. The GX354-0 system also has few additional periodicities appeared in different time intervals. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA. Weinheim