183 citations · 270 across the 7 of their papers we have counts for
7 papers · 1 filter
The mass distribution of dwarf spheroidal galaxies from stellar kinematics: Draco, Ursa Minor and Fornax
Xiaoan Wu, submitted to ApJ
We model three dSph galaxies, Draco, Ursa Minor and Fornax, as axisymmetric stellar systems embedded in spherical dark-matter potentials, which are in dynamical equilibrium without…
Superhumps Behavior during Normal Outbursts in ER UMa: Spectroscopy and Photometry
Yinghe Zhao, Zongyun Li, Xiaoan Wu +4
We have taken a 4-day spectroscopic observation and have been conducting a 13-day photometric study of the SU UMa-type dwarf nova, ER Ursae Majoris. The mean -amplitude for the…
Photometry and Spectroscopy of KS Ursae Majoris during Superoutburst
Yinghe Zhao, Zongyun Li, Xiaoan Wu +3
We report photometric and spectroscopic observations of the SU UMa-type dwarf novae, KS Ursae Majoris, during its 2003 February superoutburst. Modulations with a period of $0.07017…
Deriving the mass distribution of M87 from globular clusters
Xiaoan Wu, Scott Tremaine
We describe a maximum-likelihood method for determining the mass distribution in spherical stellar systems from the radial velocities of a population of discrete test particles. Th…
Spectroscopic Study of SU UMa-type Dwarf Nova YZ Cnc during its 2002 Superoutburst
Ying-he Zhao, Zong-yun Li, Xiao-an Wu +1
We report time-resolved spectroscopic observations of the SU Ursae Majoris dwarf nova, YZ Cnc, for 2 nights over 11 hrs during its 2002 January superoutburst. The spectra only show…
The stellar velocity distribution in the solar neighbourhood
Richard S. De Simone, Xiaoan Wu, Scott Tremaine
We explore the heating of the velocity distribution in the solar neighbourhood by stochastic spiral waves. Our investigation is based on direct numerical integration of initially c…