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Chinese Academy of Sciences Institutional Repositories Grid
Three X-ray flares near primary eclipse of the RS CVn binary XY UMa

文献类型:期刊论文

作者Gong, Hang1; Osten, Rachel2,3; Maccarone, Thomas4; Reale, Fabio5,6; Liu, Ji-Feng1,7; Heckert, Paul A.8
刊名RESEARCH IN ASTRONOMY AND ASTROPHYSICS
出版日期2016-08-01
卷号16期号:8页码:131-U134
关键词stars: binaries stars: flare stars: activity X-rays: stars
英文摘要We report on an archival X-ray observation of the eclipsing RS CVn binary XY UMa (P-orb approximate to 0.48 d). In two Chandra ACIS observations spanning 200 ks and almost five orbital periods, three flares occurred. We find no evidence for eclipses in the X-ray flux. The flares took place around times of primary eclipse, with one flare occurring shortly (< 0.125 P-orb) after a primary eclipse, and the other two happening shortly (< 0.05 P-orb) before a primary eclipse. Two flares occurred within roughly one orbital period (Delta phi approximate to 1.024 P-orb) of each other. We analyze the light curve and spectra of the system, and investigate coronal length scales during both quiescence and flares, as well as the timing of the flares. We explore the possibility that the flares are orbit-induced by introducing a small orbital eccentricity, which is quite challenging for this close binary.
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics
关键词[WOS]EXTREME-ULTRAVIOLET-EXPLORER ; LATE-TYPE STARS ; SHORT-PERIOD ; CLOSE BINARIES ; TIDAL FRICTION ; URSAE-MAJORIS ; SYSTEM ; EMISSION ; CORONAE ; CHANDRA
收录类别SCI
语种英语
WOS记录号WOS:000381832700014
源URL[http://ir.bao.ac.cn/handle/114a11/6793]  
专题国家天文台_光学天文研究部
作者单位1.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China
2.Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA
3.Johns Hopkins Univ, Ctr Astrophys Sci, Baltimore, MD 21218 USA
4.Texas Tech Univ, Dept Phys, Lubbock, TX 79409 USA
5.Univ Palermo, Dipartimento Chim & Fis, Piazza Parlamento 1, I-90134 Palermo, Italy
6.INAF Osservatorio Astron Palermo, Piazza Parlamento 1, I-90134 Palermo, Italy
7.Univ Chinese Acad Sci, Coll Astron & Space Sci, Beijing 100049, Peoples R China
8.Western Carolina Univ, Dept Chem & Phys, Cullowhee, NC 28723 USA
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GB/T 7714
Gong, Hang,Osten, Rachel,Maccarone, Thomas,et al. Three X-ray flares near primary eclipse of the RS CVn binary XY UMa[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2016,16(8):131-U134.
APA Gong, Hang,Osten, Rachel,Maccarone, Thomas,Reale, Fabio,Liu, Ji-Feng,&Heckert, Paul A..(2016).Three X-ray flares near primary eclipse of the RS CVn binary XY UMa.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,16(8),131-U134.
MLA Gong, Hang,et al."Three X-ray flares near primary eclipse of the RS CVn binary XY UMa".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 16.8(2016):131-U134.

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