84 citations · 155 across the 7 of their papers we have counts for
7 papers
The peculiar velocities in the Galactic outer disk--hints of the elliptical disk and the perturbation of the spiral structures
Hai-Jun Tian, Chao Liu, Jun-Chen Wan +7
We present the peculiar in-plane velocities derived from the LAMOST red clump stars. From the variations of the in-plane velocity with the Galactocentric radius for the young and o…
The stellar kinematics in the solar neighborhood from LAMOST data
Hai-Jun Tian, Chao Liu, Jeffrey L. Carlin +6
We use about 200,000 FGK type main-sequence stars from the LAMOST DR1 data to map the local stellar kinematics. With the velocity de-projection technique, we are able to derive the…
Two novel approaches for photometric redshift estimation based on SDSS and 2MASS databases
Dan Wang, Yan-Xia Zhang, Chao Liu +1
We investigate two training-set methods: support vector machines (SVMs) and Kernel Regression (KR) for photometric redshift estimation with the data from the Sloan Digital Sky Surv…
The DWT Power Spectrum of the two-degree Field Galaxy Redshift Survey
Yan-Chuan Cai, Jun Pan, Yong-Heng Zhao +2
The power spectrum of the two-degree Field Galaxy Redshift Survey (2dFGRS) sample is estimated with the discrete wavelet transform (DWT) method. The DWT power spectra within $0.04…
Black Hole -- Bulge Relation for Narrow-Line Objects
Bian Weihao, Zhao Yongheng
It has been thought that narrow-line Seyfert 1 galaxies are likely to be in the early stages of the evolution of active galaxies. To test this suggestion, the ratios of the central…
On X-ray variability in narrow line and broad line AGNs
W. Bian, Y. Zhao
We assembled a sample of broad line and narrow lines AGNs observed by ASCA, whose excess variances have been determined. The central black hole masses in this sample can be obtaine…