SIMBAD references

2010MNRAS.408..314S - Mon. Not. R. Astron. Soc., 408, 314-321 (2010/October-2)

Analysis of the MOST light curve of the heavily spotted K2IV component of the single-line spectroscopic binary II Pegasi.

SIWAK M., RUCINSKI S.M., MATTHEWS J.M., KUSCHNIG R., GUENTHER D.B., MOFFAT A.F.J., SASSELOV D. and WEISS W.W.

Abstract (from CDS):

Continuous photometric observations of the visible component of the single-line, K2IV spectroscopic binary II Peg carried out by the MOST satellite during 31 consecutive days in 2008 have been analysed. On top of spot-induced brightness modulation, 11 flares were detected of three distinct types characterized by different values of rise, decay and duration times. The flares showed a preference for occurrence at rotation phases when the most spotted hemisphere is directed to the observer, confirming previous similar reports. An attempt to detect a grazing primary minimum caused by the secondary component transiting in front of the visible star gave a negative result. The brightness variability caused by spots has been interpreted within a cold spot model. An assumption of differential rotation of the primary component gave a better fit to the light curve than a solid-body rotation model.

Abstract Copyright: © 2010 The Authors. Journal compilation © 2010 RAS

Journal keyword(s): stars: flare - stars: individual: II Peg - stars: rotation - starspots

Simbad objects: 7

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2019.09.23-18:14:58

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