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A PERIOD INVESTIGATION OF THE SX PHOENICIS STAR DY PEGASI
Li LJ(李临甲)1,2,3; Qian SB(钱声帮)1,2,3; Li, LJ (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊ASTRONOMICAL JOURNAL
2010-06
卷号139期号:6页码:2639-2642
DOI10.1088/0004-6256/139/6/2639
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收录类别SCI
关键词Stars: Individual (Dy Pegasi) Stars: Variables: Delta Scuti Techniques: Photometric
摘要We measure two new times of light maximum of the SX Phoenicis star DY Pegasi in 2008 December and collect 410 pe/CCD times of light maximum that had been published. These data could be modeled with a nonlinear fit including a continuously decreasing period change (dP/dt = -9.04 x 10(-12) days day(-1)) and a periodic change with a period of 42.2 yr. If this periodic change is caused by the light traveling time effect of an orbital motion of DY Pegasi in a binary system, the deduced mass of the companion could be 0.028 M(circle dot) and it is probably a brown dwarf.
项目资助者Chinese Natural Science Foundation [10973037, 10903026, 10778718] ; National Key Fundamental Research [2007CB815406] ; Yunnan Natural Science Foundation [2008CD157, 2009CD122]
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6256
URL查看原文
归档日期2010-07-12
WOS记录号WOS:000277643700042
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]DELTA-SCUTI STARS ; LONG-TERM VARIABILITY ; 3-COLOR PHOTOMETRY ; EVOLUTION
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5839
专题双星与变星研究组
中国科学院天体结构与演化重点实验室
通讯作者Li, LJ (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
作者单位1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China
3.Graduate School of the Chinese Academy of Sciences, Beijing 100039, China
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Li LJ,Qian SB,Li, LJ . A PERIOD INVESTIGATION OF THE SX PHOENICIS STAR DY PEGASI[J]. ASTRONOMICAL JOURNAL,2010,139(6):2639-2642.
APA Li LJ,Qian SB,&Li, LJ .(2010).A PERIOD INVESTIGATION OF THE SX PHOENICIS STAR DY PEGASI.ASTRONOMICAL JOURNAL,139(6),2639-2642.
MLA Li LJ,et al."A PERIOD INVESTIGATION OF THE SX PHOENICIS STAR DY PEGASI".ASTRONOMICAL JOURNAL 139.6(2010):2639-2642.
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