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Showing 2009 · astro-ph.GAShow all
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astro-ph.GA2009★ 128 cited
The orbits of open clusters in the Galaxy
Zhen-Yu Wu, Xu Zhou, Jun Ma +1
We present and analyze kinematics and orbits for a sample of 488 open clusters in the Galaxy. The velocity ellipsoid for our present sample is derived as (, , $σ_{W})…
astro-ph.GA2009★ 1 cited
Optical Variability of the Radio Source J 1128+5925 -- II. Confirmation of its Optical Quietness
Jianghua Wu, Xu Zhou, Jun Ma +3
The source J 1128+5925 was found recently to show strong intraday variability at radio wavelengths and its radio variability may come from interstellar scintillation. In optical, t…