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Variability Analysis of HBC722 using Lomb-Scargle Periodogram
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  • Variability Analysis of HBC722 using Lomb-Scargle Periodogram
  • Variability Analysis of HBC722 using Lomb-Scargle Periodogram
저자명
백기선,박수종,전이슬,최창수,이정은,임명신,Baek. Giseon,Pak. Soojong,Green. Joel D.,Jeon. Yiseul,Choi. Changsu,Lee. Jeong-Eun,Im. Myungshin,Meschia
간행물명
천문학회보
권/호정보
2013년|38권 1호|pp.52-52 (1 pages)
발행정보
한국천문학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
서지반출

기타언어초록

We present preliminary results of the photometric variability analysis in SDSS r, i and z bands for a newly confirmed FU Orionis-type object, HBC 722. We observed HBC 722 from 2011 April to 2012 November, with Camera for Quasars in Early uNiverse (CQUEAN) attached to the 2.1m Otto Struve telescope at McDonald Observatory, USA. The rapid cadence monitoring observations (minute timescale) were conducted in chosen photometric nights during observation campaigns to get adequate number of samples for short term period analysis. As this object is in active state, temperature at the inner disk/stellar surface can be characterized by the colors between r, i and z bands. Also, It is theorized that a sudden cataclysmic accretion associated with FU Orionis-type outburst can give rise to detectable "hot spots" on the central star and rotational asymmetries in the disk instability region. Thus the periodic variabilities of three bands would trace the stellar rotation or Keplerian rotation at the instability region of the inner accretion disk. Additionally, the range of instabilities could be estimated on the assumption of a temperature distribution for the HBC 722 disk. This analysis can provide a clue for understanding enhanced disk accretion of Class II young stellar object.