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Variation in the frequency separations with activity and impact on stellar parameter determination
Variation frequency separations activity impact
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2010/11/15
Frequency separations used to infer global properties of stars through asteroseismology can change depending on the strength and at what epoch of the stellar cycle the p-mode frequencies are measured....
Long-term chromospheric activity in southern M dwarfs: Gl 229 A and Gl 752 A
stars: activity late-type techniques photometry spectroscopic
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2010/11/11
Several late-type stars present activity cycles similar to that of the Sun.However, these cycles have been mostly studied in F to K stars. Due to their small intrinsic brightness, M dwarfs are not usu...
The effect of M dwarf starspot activity on low-mass planet detection thresholds
planetary systems stars activity stars atmospheres stars spots techniques
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2010/11/11
In light of the growing interest in searching for low mass, rocky planets, we investigate the
impact of starspots on radial velocity searches for earth-mass planets in orbit about M dwarf
stars. Sin...
Radiative activity of magnetic white dwarf undergoing Lorentz-force-driven torsional vibrations
magnetic white dwarf non-radial pulsations magneto-dipole emission
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2010/11/11
We study radiative activity of magnetic white dwarf undergoing torsional vibrations about axis of its own dipole magnetic moment under the action of Lorentz restoring force. It is shown that pulsating...