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The hot-Jupiter Kepler-17b: discovery, obliquity from stroboscopic starspots, and atmospheric characterization
hot-Jupiter Kepler-17b discovery stroboscopic starspots atmospheric characterization
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2011/10/20
This paper reports the discovery and characterization of the transiting hot giant exoplanet Kepler-17b. The planet has an orbital period of 1.486 days, and radial velocity measurements from the Hobby-...
Starspots, spin-orbit misalignment, and active latitudes in the HAT-P-11 exoplanetary system
Starspots spin-orbit misalignment active latitudes
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2011/10/9
We present the analysis of 4 months of Kepler photometry of the K4V star HAT-P-11, including 26 transits of its "super-Neptune" planet. The transit data exhibit numerous anomalies that we interpret as...
Starspots on the fastest rotators in the Beta Pic moving group
Stars: rotation Stars: late-typ individual HD 199143, CD− 64◦ 1208 activity starspots
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2011/10/20
We carried out high-resolution spectroscopy and BV(I)_C photometric monitoring of the two fastest late-type rotators in the nearby Beta Pictoris moving group, HD199143 (F7V) and CD-641208 (K7V). The m...
Magnetohydrostatic equilibrium in starspots: dependences on color (T_{eff}) and surface gravity (g)
Solar and Stellar Astrophysics (astro-ph.SR)
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2010/12/23
Temperature contrasts and magnetic field strengths of sunspot umbrae broadly follow the thermal-magnetic relationship obtained from magnetohydrostatic equilibrium.