搜索结果: 1-6 共查到“理论天体物理学 Cool”相关记录6条 . 查询时间(0.015 秒)
The cool end of the DZ sequence in the SDSS
the DZ sequence the SDSS
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2011/1/10
We report the discovery of cool DZ white dwarfs, which lie in the SDSS (u-g) vs. (g-r) two-color diagram across and below the main sequence. These stars represent the extension of the well-known DZ se...
Parallaxes of Southern Extremely Cool objects - I: Targets, Proper motions and first results
Parallaxes of Southern Extremely Cool objects Proper motions first results
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2010/11/11
We present results from the PARallaxes of Southern Extremely Cool objects (PARSEC)program, an observational program begun in April 2007 to determine parallaxes for 122 L and 28 T southern hemisphere d...
Ab initio Stellar Astrophysics: Reliable Modeling of Cool White Dwarf Atmospheres
Solar and Stellar Astrophysics (astro-ph.SR) Materials Science (cond-mat.mtrl-sc)
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2010/12/27
Over the last decade {\it ab initio} modeling of material properties has become widespread in diverse fields of research. It has proved to be a powerful tool for predicting various properties of matte...
Understanding the Oldest White Dwarfs: Atmospheres of Cool WDs as Extreme Physics Laboratories
Solar and Stellar Astrophysics (astro-ph.SR) Materials Science (cond-mat.mtrl-sci)
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2010/12/27
Reliable modeling of the atmospheres of cool white dwarfs is crucial for understanding the atmospheric evolution of these stars and for accurate white dwarfs cosmochronology. Over the last decade {\it...
Extreme Enhancements of r-process Elements in the Cool Metal-Poor Main-Sequence Star SDSS J2357-0052
Solar and Stellar Astrophysics (astro-ph.SR)
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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...
A Joint Chandra and XMM-Newton View of Abell 3158: Massive Off-Centre Cool Gas Clump As A Robust Diagnostic of Merger Stage
XMM-Newton Massive Off-Centre Cool Gas Clump Abell 3158
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2010/3/8
By analysing the Chandra and XMM-Newton archived data of the nearby galaxy cluster Abell 3158, which was reported to possess a relatively regular, relaxed morphology in the X-ray band in previous work...