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Mostrando ítems 11-20 de 2019
Photospheric activity and rotation of the planet-hosting star CoRoT-4a
(Astronomy & Astrophysics, 2009-10)
A possible long-term activity cycle for ι Horologii: First results from SPI-HKα project
(Oxford University Press, 2017-02)
In order to detect stellar activity cycles and study possiblestar-planet interactions (SPIs), we have been developing the HKαand SPI-HKα projects since 1999 and 2012 respectively. In thiswork, we present preliminary results ...
Activity and rotation of Kepler-17
(The American Astronomical Society, 2020)
Gamma-ray emission from star-forming regions
(Società Astronomica Italiana, 2010-04)
Star-forming regions have been tentatively associated with gamma-ray sources since the early days of the COS B satellite. After the many sources detected by the Compton Gamma-Ray Observatory, the statistical evidence for ...
Rotation and magnetism of Kepler pulsating solar-like stars: towards asteroseismically calibrated age-rotation relations
(EDP Sciences, 2014-09-24)
Kepler ultra-high precision photometry of long and continuous observations provides a unique dataset in which surface rotation and variability can be studied for thousands of stars. Because many of these old field stars ...
Hα and the Ca II H and K lines as activity proxies for late-type stars
(EDP Sciences, 2007-07)
Context.The main chromospheric activity indicator is the S index, which is the ratio of the flux in the core of the Ca II H and K lines to the continuum nearby, and is well studied for stars from F to K. Another chromospheric ...