搜索结果: 1-13 共查到“天文学 O-Type Stars”相关记录13条 . 查询时间(0.125 秒)
The Kepler characterization of the variability among A- and F-type stars. I. General overview
Asteroseismology - Stars: oscillations - Stars: variables: δ Scuti - Stars: fundamental parameters - binaries: general - Stars: statistics
2011/9/27
The Kepler spacecraft is providing time series of photometric data with micromagnitude precision for hundreds of A-F type stars. We present a first general characterization of the pulsational behaviou...
The HARPS search for southern extra-solar planets. XXXI. Magnetic activity cycles in solar-type stars: statistics and impact on precise radial velocities
Planetary systems – Stars: activity – Stars: chromospheres – Line: profi les – Techniques: radial velocities – Techniques:spectroscopic
2011/10/17
Context. Searching for extrasolar planets through radial velocity measurements relies on the stability of stellar photospheres. Aims. We aim at characterizing the statistical properties of magnetic ac...
Effects of dust on light-curves of εAur type stars
Accretion, accretion disks – Scattering – binaries: eclipsing – circumstellar matter – Stars: individual: ǫ Aur
2011/10/11
\epsilon Auriga is one of the most mysterious objects on the sky. Prior modeling of its light-curve assumed a dark, inclined, non-transparent or semi-transparent, dusty disk with a central hole. The h...
Modeling of differential rotation in rapidly rotating solar-type stars
Modeling differential rotation rapidly rotating solar-type stars
2011/10/9
We investigate differential rotation in rapidly rotating solar-type stars by means of an axisymmetric mean field model that was previously applied to the sun. This allows us to calculate the latitudin...
Variability in the CoRoT photometry of three hot O-type stars. HD 46223, HD 46150 and HD 46966
stars: variables: general – stars: early-type – stars: individual: HD 46223 – stars: individual: HD 46150 – stars: individual: HD 46966 – stars: oscillations
2011/9/27
The detection of pulsational frequencies in stellar photometry is required as input for asteroseismological modelling. The second short run (SRa02) of the CoRoT mission has provided photometric data o...
Two Wide Planetary-Mass Companions to Solar-Type Stars in Upper Scorpius
brown dwarfs planetary systems Infrared planetary systems
2010/11/12
At wide separations, planetary-mass and brown dwarf companions to solar type stars occupy a
curious region of parameters space not obviously linked to binary star formation or solar-system scale plan...
The kinematic characteristics of magnetic O-type stars
astrometry — stars early-type — stars magnetic field — stars kinematics and dynamics open clusters
2010/11/15
Although magnetic fields have been discovered in ten massive O-type stars during the last years, the origin of their magnetic fields remains unknown. Among the magnetic O-type stars, two stars, HD3687...
The masses, and the mass discrepancy of O-type stars
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/28
The "mass discrepancy" in massive O stars represents a long-standing problem in stellar astrophysics with far-reaching implications for the chemical and dynamical feedback in galaxies.
The mass distribution of secondaries to solar-type stars
solar-type stars mass distribution
2009/6/16
The mass distribution of secondaries to solar-type stars。
The Winds of O-Type Stars：Ionization Structure and Revised Stellar Parameters from Far-UV Spectra
O-Type Stars Stellar Parameters Ionization Structure Far-UV Spectra
2009/6/16
The Winds of O-Type Stars：Ionization Structure and Revised Stellar Parameters from Far-UV Spectra。
Quantitative Stellar Spectral Classification. II. Early Type Stars
Stellar Spectral Classification Early Type Stars
2009/6/11
Quantitative Stellar Spectral Classification. II. Early Type Stars。
Quantitative Stellar Spectral Classification. II. Early Type Stars
Stellar Spectral Classification Early Type Stars
2009/6/10
Quantitative Stellar Spectral Classification. II. Early Type Stars。
PROGRESS REPORT ON THE MONITORING ACTIVE LATE-TYPE STARS IN 2005/2006 AND THE ANALYSIS OF V523 CAS
Stars late type-Stars activity-starspots-Stars individual V523 Cas
2009/2/18
We present the light curve analysis of late-type binary V523 Cas
for the season 2005. The spot has been revealed on the secondary. According to
theoretical considerations, the spot appeared to be ho...