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Deriving the radial-velocity variations induced by stellar activity from high-precision photometry - Test on HD189733 with simultaneous MOST/SOPHIE data
late-type – stars: activity – stars: rotation – techniques: radial velocity – planetary systems – stars: individual
2011/10/19
Stellar activity induces apparent radial velocity (RV) variations in late-type main-sequence stars that may hamper the detection of low-mass planets and the measurement of their mass. We use simultane...
Searching for initial mass function variations in resolved stellar populations
Searching function variations resolved stellar populations
2011/10/13
The initial mass function (IMF) succinctly characterizes a stellar population, provides a statistical measure of the end result of the star-formation process, and informs our under- standing of the st...
Superorbital Period Variations in the X-ray Pulsar LMC X-4
accretion disks neutron—X-rays:binaries
2009/5/19
We report the discovery of a decay in the superorbital period of
the binary X-ray pulsar LMC X-4. Combining archival data and published
long term X-ray light curves, we have found a decay in the thi...