Search Publications

Morphology and structure of BzK-selected galaxies at z ∼ 2 in the CANDELS-COSMOS field

Kong, Xu; Chen, Yang; Fang, Guan-Wen +1 more

Utilizing a BzK-selection technique, we obtain 14550 star-forming galaxies (sBzKs) and 1763 passive galaxies (pBzKs) at z ∼ 2 from the K-selected (K_AB < 22.5) catalog in the COSMOS/UltraVISTA field. The differential number counts of sBzKs and pBzKs are consistent with the results from the literature. Compared to the observed results,…

High resolution deep imaging of a bright radio quiet QSO at z ~ 3

Tanaka, Ichi; Yamada, Toru; Iye, Masanori +3 more

We have obtained deep J and Ks-band images centered on a bright radio quiet QSO UM 402 (z_em = 2.856) using the IRCS camera and adaptive optics systems that are part of the Subaru Telescope, as well as retrieved WFC3/F140W archive images of this object. A faint galaxy (m_k = 23.32±0.05 in the Vega magnitude system) that lies ~ …

Morphology and structure of extremely red objects at z ∼ 1 in the CANDELS-COSMOS field

Kong, Xu; Chen, Yang; Fang, Guan-Wen +1 more

Using high-resolution HST/Wide Field Camera 3 F125W imaging from the CANDELS-COSMOS field, we report the structural and morphological properties of extremely red objects (EROs) at z ∼ 1. Based on the UVJ color criteria, we separate EROs into two types: old passive galaxies (OGs) and dusty star-forming galaxies (DGs). For a given stellar mass, we f…

The inner ∼ 40 pc radial distribution of the star formation rate for a nearby Seyfert 2 galaxy M51

Bian, Wei-Hao; He, Zhi-Cheng; Fang, Li-Ling +1 more

We investigate the spatially resolved specific star formation rate (SSFR) in the inner ∼40 pc for a nearby Seyfert 2 galaxy, M51 (NGC 5194) by analyzing spectra obtained with the Hubble Space Telescope (HST) Space Telescope Imaging Spectrograph (STIS). We present 24 radial spectra measured along the STIS long slit in M51, extending ∼ 1″ from the n…