Search Publications
Estimating Black Hole Masses of AGNs using Ultraviolet Emission Line Properties
Wang, Ran; Wu, Xue-Bing; Kong, Min-Zhi +1 more
Based on measured broad line region sizes in the reverberation-mapping AGN sample, two new empirical relations are introduced to estimate the central black hole masses of radio-loud high-redshift (z>0.5) AGNs. First, using the archival IUE/HST spectroscopy data at UV band for the reverberation-mapping objects, we obtained two new empirical rela…
A Deprojection Analysis of Abell 1650 with XMM-Newton
Chen, Li; Jia, Shu-Mei; Chen, Yong
We revisit the XMM-Newton observation of the galaxy cluster Abell 1650 with a deprojection technique. We find that the radial deprojected spectra of Abell 1650 can be marginally fitted by a single-temperature model. In order to study the properties of the central gas, we fit the spectra of the central two regions with a two-temperature model. The …
Velocity Space of Galactic O-B Stars
Zhu, Zi
Based on the Hipparcos proper motions and available radial velocity data of O-B stars, we have re-examined the local kinematical structure of the young disk population of ~1500 O-B stars not including the Gould-belt stars. A systematic warping motion of the stars about the direction to the Galactic center has been reconfirmed. A negative K-term im…
A Multiwavelength Study of the Jets in FR-I Radio Galaxies: I. Data and Analysis
Zhou, Hong-Yan; Meng, Da-Min
We compile a sample of 11 Fanaroff-Riley type I Radio Galaxies (FR-I RGs) with multi-wavelength observations to address the dynamic behavior of jets in these objects. Optical images acquired by the Hubble Space Telescope (HST) are carefully analyzed. The method and reduction procedure are described in detail. Unresolved optical cores emerge after …