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THE ORBITAL EPHEMERIS OF THE PARTIAL ECLIPSING X-ray BINARY X1822-371 KCI 등재

  • 언어ENG
  • URLhttps://db.koreascholar.com/Article/Detail/385702
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천문학논총 (Publications of the Korean Astronomical Society)
한국천문학회 (Korean Astronomical Society)
초록

X1822-371 is a low mass X-ray binary with an accretion disk corona exhibiting partial eclipses and pulsations in the X-ray band. We update its orbital ephemeris by combining new RXTE observations and historical records, with a total time span of 34 years. There were 11 RXTE observations in 2011 but the eclipsing pro le can be seen in only 4 of them. The eclipsing center times were obtained by fitting the profile with the same model as previous studies. Combined with the eclipsing center times reported by Iaria et al. (2011), the O-C analysis was processed. A quadratic model was applied to fit the O-C results and produced a mean orbital period derivative of _Porb = 1.339(25) X 10-10s=s, which is slightly smaller than previous records. In addition to the orbital modulation from the orbital profile, we also present our preliminary results for measuring the orbital parameters using the orbital Doppler effect from the pulsation of the neutron star in X1822-371. The updated orbital parameters from eclipsing profiles will be further compared with the ones from pulsar timing.

목차
ABSTRACT
1. INTRODUCTION
2. OBSERVATIONS AND DATA ANALYSIS
3. SUMMARY
REFERENCES
저자
  • Hung-En Hsieh(Graduate Institute of Astronomy, National Central University)
  • Yi Chou(Graduate Institute of Astronomy, National Central University)
  • Chin-Ping Hu(Graduate Institute of Astronomy, National Central University)
  • Ting-Chang Yang(Graduate Institute of Astronomy, National Central University)
  • Yi-Hao Su(Graduate Institute of Astronomy, National Central University)
  • Ching-Ping Lin(Graduate Institute of Astronomy, National Central University)
  • Po-Sheng Chuang(Graduate Institute of Astronomy, National Central University)
  • Nai-Hui Liao(Graduate Institute of Astronomy, National Central University)