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- Center for Astrophysics Harvard & SmithsonianUS68 papers
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5 papers · 2 filters
Rotational and Cyclical Variability in gamma Cassiopeiae. II. Fifteen Seasons
Gregory W. Henry, Myron A. Smith
The B0.5IVe star gam Cas is of great interest because it is the prototype of a small group of classical Be stars having hard X-ray emission of unknown origin. We discuss results fr…
The Stellar Activity - Rotation Relationship
Nicholas J. Wright, Jeremy J. Drake, Eric E. Mamajek +1
Using a new catalog of 824 solar and late-type stars with X-ray luminosities and rotation periods we have studied the relationship between rotation and stellar activity. From an un…
Orbital and physical parameters of eclipsing binaries from the ASAS catalogue - IV. A 0.61 + 0.45 M_sun binary in a multiple system
K. G. Hełminiak, M. Konacki, M. Rozyczka +12
We present the orbital and physical parameters of a newly discovered low-mass detached eclipsing binary from the All-Sky Automated Survey (ASAS) database: ASAS J011328-3821.1 A - a…
Spot activity of LQ Hya from photometry between 1988 and 2011
J. Lehtinen, L. Jetsu, T. Hackman +2
We investigate the spot activity of the young chromospherically active main sequence star LQ Hya. Our aims are to identify possible active longitudes, estimate the differential rot…
Asteroseismology of the Nearby SN-II Progenitor: Rigel Part I. The MOST High Precision Photometry and Radial Velocity Monitoring
Ehsan Moravveji, Edward F. Guinan, Matt Shultz +2
Rigel (beta Ori, B8 Ia) is a nearby blue supergiant displaying alpha Cyg type variability, and is one of the nearest type-II supernova progenitors. As such it is an excellent test…