72 citations · 477 across the 27 of their papers we have counts for
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astro-ph2007★ 32 cited
Structural Parameters of Mayall II = G1 in M31
J. Ma, R. de Grijs, D. Chen +6
Mayall II = G1 is one of the most luminous globular clusters (GCs) known in M31. New deep, high-resolution observations with the Advanced Camera for Surveys on the {\sl Hubble Spac…
astro-ph2005★ 28 cited
Optical Monitoring of PKS 1510-089: A Binary Black Hole System?
J. Wu, X. Zhou, B. Peng +3
Three deep flux minima were observed with nearly the same time-scales and intervals for the blazar PKS 1510-089 in the past few years. A binary black hole system was proposed to be…
astro-ph2000★ 72 cited
Spatially resolved Spectro-photometry of M81: Age, Metallicity and Reddening Maps
X. Kong, X. Zhou, J. S. Chen +1
In this paper, we present a multi-color photometric study of the nearby spiral galaxy M81, using images obtained with the Beijing Astronomical Observatory 60/90 cm Schmidt Telescop…