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31 papers · 2 filters
The HASHTAG project I. A Survey of CO(3-2) Emission from the Star Forming Disc of M31
Zongnan Li, Zhiyuan Li, Matthew W. L. Smith +26
We present a CO(3-2) survey of selected regions in the M31 disc as part of the JCMT large programme, HARP and SCUBA-2 High-Resolution Terahertz Andromeda Galaxy Survey (HASHTAG). T…
The correlations between optical/UV broad lines and X-ray emission for a large sample of quasars
J. D. Timlin, W. N. Brandt, Q. Ni +5
We present Chandra observations of 2106 radio-quiet quasars in the redshift range 1.7<z<2.7 from the Sloan Digital Sky Survey (SDSS), through data release fourteen (DR14), that do…
XMM-Newton RGS spectroscopy of the M31 bulge. I: Evidences for a past AGN half a million years ago
Shuinai Zhang, Q. Daniel Wang, Adam R. Foster +3
Existing analysis based on XMM-Newton/RGS spectra already shows that the G-ratio of the OVII He triplet in the inner bulge of M31 is too high to be consistent with a pure optica…
Resolving the Interstellar Medium in Ultraluminous Infrared QSO Hosts with ALMA
Qing-Hua Tan, Yu Gao, Kotaro Kohno +8
We present ALMA observations of the CO(1-0) line and 3-mm continuum emission in eight ultraluminous infrared (IR) quasi-stellar objects (QSOs) at z = 0.06-0.19. All eight IR QSO ho…
Discovery of an Edge-on Galaxy with X-shaped Bi-cone --- SDSS J171359.00+333625.5
Min Bao, Yanmei Chen, Qirong Yuan +5
Using the integral field unit (IFU) data from Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey, we study the kinematics of gas and stellar components in an edge-o…
Trigonometric Parallaxes Of High-Mass Star Forming Regions: Our View Of The Milky Way
M. J. Reid, K. M. Menten, A. Brunthaler +15
We compile and analyze ~200 trigonometric parallaxes and proper motions of molecular masers associated with very young high-mass stars. These measurements strongly suggest that the…