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Vibrational Instability of Metal-Poor Low-Mass Main-Sequence Stars
Vibrational Instability Metal-Poor Low-Mass Main-Sequence Stars
2012/2/24
We find that low-degree low-order g-modes become unstable in metal-poor low-mass stars due to the $\varepsilon$-mechanism of the pp-chain. Since the outer convection zone of these stars is limited onl...
Habitability of Super-Earth Planets around Main-Sequence Stars including Red Giant Branch Evolution: Models based on the Integrated System Approach
Main-Sequence Stars including Red Giant Branch Evolution Models based Integrated System Approach
2011/10/20
In a previous study published in Astrobiology, we focused on the evolution of habitability of a 10 M_E super-Earth planet orbiting a star akin to the Sun. This study was based on a concept of planetar...
Abundance anomalies in pre-main-sequence stars: Stellar evolution models with mass loss
Diffusion — stars chemically peculiar — stars mass–loss — stars pre–main-sequence — stars evolution — stars
2010/11/12
Aims. The effects of atomic diffusion on internal and surface abundances of A and F pre–main-sequence stars with mass loss are studied in order to determine at what age the effects materialize, as wel...
Absolute properties of BG Ind - a bright F3 system just leaving the Main Sequence
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/27
We present photometric and spectroscopic analysis of the bright detached eclipsing binary BG Ind. The masses of the components are found to be 1.428 +- 0.008 and 1.293 +- 0.008 Msun and the radii to b...
Extreme Enhancements of r-process Elements in the Cool Metal-Poor Main-Sequence Star SDSS J2357-0052
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/23
We report the discovery of a cool metal-poor, main-sequence star exhibiting large excesses of r-process elements. This star is one of two newly discovered cool subdwarfs (effective temperatures of 500...
The Effect of Screening Factors and Thermonuclear Reaction Rates in the Pre-main Sequence Evolution of Low Mass Stars
Low mass stars thermonuclear reaction rates electron screening factors composition changes
2010/9/15
In understanding the nucleosynthesis of the elements in stars,one of the most important quantities is the reaction rate and it must be evaluated in terms of the stellar temperature T , and its determi...
Chemical composition in fast rotators main sequence stars
Chemical composition main sequence stars
2009/7/10
Chemical composition in fast rotators main sequence stars。
Old main-sequence turnoff photometry in the SMC。
The pre-main sequence population of NGC 6530 in M8。
Red Dwarfs and the End of the Main Sequence。
The evolution of intermediate mass stars from the main sequence to the white dwarf stage
mass stars white dwarf stage main sequence
2009/6/10
The evolution of intermediate mass stars from the main sequence to the white dwarf stage。
NGC 3293：Its Main Sequence Structure。
On the basis of the empirical distributions of the radii and critical
rotation velocities for normal stars an analysis concerning the surface-gravity
(g(M)) distribution along the main sequence is u...