Rotation, differential rotation, and gyrochronology of activeKeplerstars
نویسندگان
چکیده
منابع مشابه
Rotation- and temperature-dependence of stellar latitudinal differential rotation
More than 600 high resolution spectra of stars of spectral type F and later have been obtained in order to search for signatures of differential rotation in line profiles. In 147 stars the rotation law could be measured; 28 of them are found to be differentially rotating. Comparison to rotation laws in stars of spectral type A reveals that differential rotation sets in at the convection boundar...
متن کاملThe Dependence of Differential Rotation on Temperature and Rotation
We use Doppler imaging techniques to determine the dependence of starspot rotation rates on latitude in an homogeneous sample of young, rapidly-rotating solar analogues. A solar-like differential rotation law is used, where the rotation depends on sin(θ), where θ is the stellar latitude. By including this term in the image reconstruction process, using starspots as tracers, we are able to deter...
متن کاملStellar Rotation in the Hyades and Praesepe: Gyrochronology and Braking Timescale
We present the results of photometric surveys for stellar rotation in the Hyades and in Praesepe, using data obtained as part of the SuperWASP exoplanetary transit-search programme. We determined accurate rotation periods for more than 120 sources whose cluster membership was confirmed by common proper motion and colour-magnitude fits to the clusters’ isochrones. This allowed us to determine th...
متن کاملDifferential Rotation in F Stars
Differential rotation can be detected in single line profiles of stars rotating more rapidly than about v sin i = 10 km s with the Fourier transform technique. This allows to search for differential rotation in large samples to look for correlations between differential rotation and other stellar parameters. I analyze the fraction of differentially rotating stars as a function of color, rotatio...
متن کاملMental Rotation Mental Rotation
the typical characterization of individuals with mild mental retardation, by seldom being able to live independently. As evidenced by the example of Williams syndrome, summary test scores often do not represent well the level of ability within individual domains. Thus it is crucial to take into account etiology when planning either basic research or intervention. At the same time, it is importa...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2015
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201526216