Stellar activity of planetary host star HD 189 733
نویسندگان
چکیده
منابع مشابه
Spectral types of planetary host star candidates from OGLE III
Context. The Optical Gravitational Lensing Experiment project has recently provided the OGLE III list of low-luminosity object transits from campaigns #3 and #4, reporting 40 new objects exhibiting the low-amplitude photometric eclipses expected for exoplanets. Compared to previous OGLE targets, these OGLE III candidates have been more restrictively selected and may contain low-mass planets. Ai...
متن کاملSeismology and activity of the F type star HD 49933
A 10-night asteroseismic observation programme has been conducted in January 2004 with the spectrometer harps at the ES0 3.6-m telescope. The selected target, the 6th magnitude F5V star HD 49933, was chosen among the prime candidates of corot, the European space mission dedicated to characterize stellar oscillations mode with high precision photometry measurements. This star shows important lin...
متن کاملSub-Saturn Planetary Candidates of HD 16141 and HD 46375.
Precision Doppler measurements from the Keck High-Resolution Echelle Spectrograph reveal periodic Keplerian velocity variations in the stars HD 16141 and HD 46375. HD 16141 (G5 IV) has a period of 75.8 days and a velocity amplitude of 11 m s-1, yielding a companion having Msini=0.22 M(JUP) and a semimajor axis of a=0.35 AU. HD 46375 (K1 IV-V) has a period of 3.024 days and a velocity amplitude ...
متن کاملDetection of Planetary Transits of the Star HD 209458 in the Hipparcos Data Set.
A search of the Hipparcos satellite photometry data for the star HD 209458 reveals evidence for a planetary transit signature consistent with the planetary properties reported by Henry et al. and Charbonneau et al. and allows further refinement of the planet's orbital period. The long time baseline (about 2926 days or 830 periods) from the best Hipparcos transit-like event to the latest transit...
متن کاملDoes the HD 209458 planetary system pose a challenge to the stellar atmosphere models?
Aims. There are very few comparisons between theoretical and empirical limb-darkening coefficients (LDCs). To develop this scenario, we analyse the case of the HD 209458 planetary system for which 10 passband measurements of linear and quadratic LDCs are
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2009
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:200810648