搜索结果: 1-7 共查到“恒星与银河系 old”相关记录7条 . 查询时间(0.046 秒)
Solving a 30-year-old problem in massive star formation（图）
massive star 30-year-old
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2014/3/17
Some 30 years ago, astronomers found that regions of ionized gas around young high mass stars remain small (under a third of a light-year) for ten times longer than they should if they were to expand ...
Stellar lifetime and ultraviolet properties of the old metal-rich Galactic open cluster NGC6791: a pathway to understand the UV upturn of elliptical galaxies
Stellar lifetime ultraviolet properties old metal-rich Galactic cluster NGC6791 UV upturn elliptical galaxies
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2012/2/23
The evolutionary properties of the old metal-rich Galactic open cluster NGC6791 are assessed, based on deep UB photometry and 2Mass JK data. For 4739 stars in the cluster, bolometric luminosity and ef...
Segue 3: An Old, Extremely Low luminosity Star Cluster in the Milky Way's Halo
Extremely luminosity Star Cluster Milky Way
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2011/10/10
We investigate the kinematic and photometric properties of the Segue 3 Milky Way companion using Keck/DEIMOS spectroscopy and Magellan/IMACS g and r-band imaging. Using maximum likelihood methods to a...
Probing structure and populations of our Galaxy using the kinematics of old stars. II
Probing structure kinematics of old stars Galaxy
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2009/6/30
Probing structure and populations of our Galaxy using the kinematics of old stars. II。
Probing structure and populations of our Galaxy using the kinematics of old stars. I
Probing structure kinematics of old stars Galaxy
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2009/6/30
Probing structure and populations of our Galaxy using the kinematics of old stars. I。
Spectroscopy of old nova candidates
old nova candidates Spectroscopy
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2009/6/17
Spectroscopy of old nova candidates。
Recovery of old novae
old novae Recovery
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2009/6/17
Recovery of old novae。