Search Publications
The abundance of massive compact galaxies at 1.0 < z < 3.0 in 3D-HST/CANDELS
Yuan, Qi-Rong; Lu, Shi-Ying; Gu, Yi-Zhou +1 more
Based on a large sample of massive (M * ⩾ 1010 M ⊙) compact galaxies at 1.0 < z < 3.0 in five 3D-HST/CANDELS fields, we quantify the fractional abundance and comoving number density of massive compact galaxies as a function of redshift. The samples of compact quiescent galaxies (cQGs) and compact star-forming…
Galaxy properties derived with spectral energy distribution fitting in the Hawaii-Hubble Deep Field-North
Xue, Yong-Quan; Gao, Fang-You; Li, Jun-Yao
We compile multi-wavelength data from ultraviolet to infrared (IR) bands as well as redshift and source-type information, for a large sample of 178 341 sources in the Hawaii-Hubble Deep Field-North field. A total of 145 635 sources among the full sample are classified/treated as galaxies and have redshift information available. We derive physical …
On the weak Lyα emission line of BL Lacertae objects
Bu, Jia; Ma, Ren-Yi; Fang, Tao-Tao +2 more
Recent studies reveal that weak Lyα emission line may be a ubiquitous feature of nearby BL Laceratae objects (BL Lacs). We present a survey of the Lyα emission lines in BL Lacs, with a focus on data obtained by the Cosmic Origins Spectrograph onboard the Hubble Space Telescope. Among the 11 selected targets, seven show a clear detection of the int…
Decomposing the host galaxy from high-z QSOs using principal component analysis
Wang, Yi-Ping; He, Wei
High resolution deep imaging from space and adaptive optics techniques with large ground-based facilities have enabled studies examining faint host galaxies of high redshift quasi-stellar objects (QSOs). However, the related image processing techniques, especially for a precise point-spread function (PSF) reconstruction and characterization of the…