Gong Hang1; Osten Rachel2; Maccarone Thomas3; Reale Fabio4; Liu Jifeng1; Heckert Paul A5
Source Publicationresearchinastronomyandastrophysics
AbstractWe report on an archival X-ray observation of the eclipsing RS CVn binary XY UMa (P_(orb) ≈ 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 occurredwithin roughly one orbital period (?φ ≈ 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.
Document Type期刊论文
2.Space Telescope Science Institute
4.Dipartimento di Fisica e Chimica, Universita di Palermo
5.Department of Chemistry and Physics,Western Carolina University
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Gong Hang,Osten Rachel,Maccarone Thomas,et al. threexrayflaresnearprimaryeclipseoftherscvnbinaryxyuma[J]. researchinastronomyandastrophysics,2016,16(8):131.
APA Gong Hang,Osten Rachel,Maccarone Thomas,Reale Fabio,Liu Jifeng,&Heckert Paul A.(2016).threexrayflaresnearprimaryeclipseoftherscvnbinaryxyuma.researchinastronomyandastrophysics,16(8),131.
MLA Gong Hang,et al."threexrayflaresnearprimaryeclipseoftherscvnbinaryxyuma".researchinastronomyandastrophysics 16.8(2016):131.
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