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29 papers · 2 filters
Modeling Warm Absorption in HST/COS Spectrum of Mrk 290 with XSTAR
S. N. Zhang, L. Ji, T. R. Kallman +4
We present a new method to model a HST/COS spectrum, aimed to analyze intrinsic UV absorption from the outflow of Mrk 290, a Seyfert I galaxy. We use newly updated XSTAR to generat…
A Possible Extension of the Scutum-Centaurus Arm into the Outer Second Quadrant
Yan Sun, Ye Xu, Ji Yang +4
Combining HI data from the Canadian Galactic Plane Survey~(CGPS) and CO data from the Milky Way Imaging Scroll Painting (MWISP) project, we have identified a new segment of a spira…
CO observations of a sample towards nearby galaxies
Fa-Cheng Li, Yuan-Wei Wu, Ye Xu
We have simultaneously observed CO, CO, and CO (J=10) rotational transitions in the centers of a sample of 58 nearby spiral galaxies using the 13.7-m millim…
ALMA Observations of Warm Dense Gas in NGC 1614 --- Breaking of Star Formation Law in the Central kpc
C. K. Xu, C. Cao, N. Lu +20
We present ALMA Cycle-0 observations of the CO (6-5) line emission and of the 435um dust continuum emission in the central kpc of NGC 1614, a local luminous infrared galaxy (LIRG)…
Are broad optical balmer lines from central accretion disk in PG 1613+658?
XueGuang Zhang
In this letter, we report positive correlations between broad line width and broad line flux for the broad balmer lines of the long-term observed AGN PG 1613+658. Rather than the e…
Inefficient Star Formation In Extremely Metal Poor Galaxies
Yong Shi, Lee Armus, George Helou +5
The first galaxies contain stars born out of gas with little or no metals. The lack of metals is expected to inhibit efficient gas cooling and star formation but this effect has ye…