搜索结果: 1-14 共查到“理学 Stellar evolution”相关记录14条 . 查询时间(0.126 秒)
NOAO/Gemini: Sakurai's Object: Stellar evolution in real time
NOAO/Gemini Sakurai's Object Stellar evolution real time
2014/4/16
Stellar lifetimes are measured in billions of years, so changes in their appearance rarely take place on a human timescale. Thus an opportunity to observe a star passing from one stage of life to anot...
Stellar Evolution Constraints on the Triple-Alpha Reaction Rate
Stellar Evolution Constraints Triple-Alpha Reaction Rate
2011/10/19
We investigate the quantitative constraint on the triple-alpha reaction rate based on stellar evolution theory, motivated by the recent significant revision of the rate proposed by nuclear physics cal...
The white dwarf cooling sequence of NGC 6791: a unique tool for stellar evolution
stars: white dwarfs – stars: luminosity function, mass function – (Galaxy:) open clusters and associations: general –(Galaxy:) open clusters and associations: individual: NGC 6791
2011/10/9
NGC 6791 is a well-studied, metal-rich open cluster that is so close to us that can be imaged down to luminosities fainter than that of the termination of its white dwarf cooling sequence, thus allowi...
Catalogs of Hot White Dwarfs in the Milky Way from GALEX's Ultraviolet Sky Surveys. Constraining Stellar Evolution
Astronomical Data Bases catalogues — stars white dwarfs — stars evolution — Galaxy
2010/11/11
We present comprehensive catalogs of hot star candidates in the Milky Way, se-lected from GALEX far-UV (FUV, 1344-1786°A) and near-UV (NUV, 1771-2831°A)imaging. The FUV and NUV photometry allows us to...
Abundance Patterns in S-type AGB stars : Setting Constraints on Nucleosynthesis and Stellar Evolution Models
Abundance Patterns Setting Constraints Stellar Evolution Models
2010/11/12
During the evolution on the AGB, S-type stars are the first objects to experience s-process nucleosynthesis and third dredge-ups, and therefore to exhibit sprocess signatures in their atmospheres.
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...
The stellar evolution of Luminous Red Galaxies, and its dependence on colour, redshift, luminosity and modelling
galaxies evolution - cosmology observations - surveys
2010/11/15
We present a series of colour evolution models for Luminous Red Galaxies (LRGs) in the 7th spectroscopic data release of the Sloan Digital Sky Survey (SDSS), computed using the full-spectrum fitting c...
Review about populations of Be stars: stellar evolution of extreme stars
Solar and Stellar Astrophysics (astro-ph.SR)
2011/1/6
Among the emission-line stars, the classical Be stars known for their extreme properties are remarkable. The Be stars are B-type main sequence stars that have displayed at least once in their life emi...
Plasma neutrino energy loss due to the axial-vector current at the late stages of stellar evolution
Weinberg-Salam theory plasma neutrino energy loss stellar evolution
2009/9/17
Based on the Weinberg-Salam theory, the plasma neutrino energy loss rates of vector and axial-vector contributions are studied. A ratable factor of the rates from the axial-vector current relative to ...
Plasma neutrino energy loss due to the axial-vector current at the late stages of stellar evolution
Weinberg-Salam theory plasma neutrino energy loss stellar evolution
2009/9/9
Based on the Weinberg-Salam theory, the plasma neutrino energy loss rates of vector and axial-vector contributions are studied. A ratable factor of the rates from the axial-vector current relative to ...
Pair neutrino energy loss for nuclei 56Fe at the late stages of stellar evolution
Weinberg-Salam theory pair neutrino energy loss stellar evolution
2009/8/14
Based on the Weinberg-Salam theory, the pair neutrino energy loss rates for nuclei 56Fe are canvassed for the wide range of density and temperature. The results of ours (QLJ) are compared with those o...
The competition of neutrino energy loss due to the pair, photo-, plasma process at the late stages of stellar evolution
NEL the Weinberg-Salam theory stellar evolution
2009/8/14
Based on the Weinberg-Salam theory, the competition of the Neutrino Energy Loss (NEL) rates due to the pair, photo- and plasma process are canvassed. The ratio factor C1, C2 and C3 which correspond th...
Constraints on stellar evolution from observations of Compact object binaries
stellar evolution Compact object binaries
2009/6/17
Constraints on stellar evolution from observations of Compact object binaries。
Magellanic clouds planetary nebulae：an updated view on stellar evolution and populations
clouds planetary nebulae opulations stellar evolution
2009/6/11
Magellanic clouds planetary nebulae：an updated view on stellar evolution and populations。