137 citations · 548 across the 33 of their papers we have counts for
23 papers · 1 filter
An XMM-Newton View of the ANdromeda Galaxy as Explored in a Legacy Survey (New-ANGELS) II: Luminosity Function of X-ray Sources
Rui Huang, Jiang-Tao Li, Wei Cui +5
As part of the New-ANGELS program, we systematically investigate the X-ray luminosity functions (XLFs) of 4506 X-ray sources projected within a radius of 2.5 deg centering on M31.…
Modeling the cool gas clumps in the circumgalactic medium
Hang Yang, Zhijie Qu, Joel N. Bregman +1
A major challenge in CGM studies is determining the three-dimensional (3D) properties from the observed projected observations. Here, we decompose the 3D gas density and spatial di…
eDIG-CHANGES II: Project Design and Initial Results on NGC 3556
Jiang-Tao Li, Li-Yuan Lu, Zhijie Qu +19
The extraplanar diffuse ionized gas (eDIG) represents ionized gases traced by optical/UV lines beyond the stellar extent of galaxies. We herein introduce a novel multi-slit narrow-…
The XMM-Newton Line Emission Analysis Program (X-LEAP) II: The Multi-scale Temperature Structures in the Milky Way Hot Gas
Zhijie Qu, Zeyang Pan, Joel N. Bregman +1
This paper presents the multi-scale temperature structures in the Milky Way (MW) hot gas, as part of the XMM-Newton Line Emission Analysis Program (X-LEAP), surveying the O VII, O…
An ensemble study of turbulence in extended QSO nebulae at --1
Mandy C. Chen, Hsiao-Wen Chen, Michael Rauch +10
Turbulent motions in the circumgalactic medium (CGM) play a critical role in regulating the evolution of galaxies, yet their detailed characterization remains elusive. Using two-di…
The Cosmic Ultraviolet Baryon Survey: Empirical Characterization of Turbulence in the Cool Circumgalactic Medium
Hsiao-Wen Chen, Zhijie Qu, Michael Rauch +11
This paper reports the first measurement of the relationship between turbulent velocity and cloud size in the diffuse circumgalactic medium (CGM) in typical galaxy halos at redshif…
Scientific Objectives of the Hot Universe Baryon Surveyor (HUBS) Mission
Joel Bregman, Renyue Cen, Yang Chen +51
The Hot Universe Baryon Surveyor (HUBS) is a proposed space-based X-ray telescope for detecting X-ray emissions from the hot gas content in our universe. With its unprecedented spa…
The Cosmic Ultraviolet Baryon Survey (CUBS) VI: Connecting Physical Properties of the Cool Circumgalactic Medium to Galaxies at
Zhijie Qu, Hsiao-Wen Chen, Gwen C. Rudie +12
This paper presents a new sample of 19 unique galaxies and galaxy groups at from the CUBS program, which is designated as the CUBSz1 sample. In this CUBSz1 sample, nine…
eDIG-CHANGES I: Extended Hα Emission from the Extraplanar Diffuse Ionized Gas (eDIG) around CHANG-ES Galaxies
Li-Yuan Lu, Jiang-Tao Li, Carlos J. Vargas +14
The extraplanar diffuse ionized gas (eDIG) represents the cool/warm ionized gas reservoir around galaxies. We present a spatial analysis of H images of 22 nearby edge-on spiral…
The Cosmic Ultraviolet Baryon Survey (CUBS) V: On the Thermodynamic Properties of the Cool Circumgalactic Medium at
Zhijie Qu, Hsiao-Wen Chen, Gwen C. Rudie +11
This paper presents a systematic study of the photoionization and thermodynamic properties of the cool circumgalactic medium (CGM) as traced by rest-frame ultraviolet absorption li…
Empirical constraints on the turbulence in QSO host nebulae from velocity structure function measurements
Mandy C. Chen, Hsiao-Wen Chen, Michael Rauch +9
We present the first empirical constraints on the turbulent velocity field of the diffuse circumgalactic medium around four luminous QSOs at --1.1. Spatially exten…
Absorption Line Search Through Three Local Group Dwarf Galaxy Halos
Zhijie Qu, Joel N. Bregman
Dwarf galaxies are missing nearly all of their baryons and metals from the stellar disk, presumed to be in a bound halo or expelled beyond the virial radius. The virial temperature…
The Warm Gas in the MW: the Kinematical Model of C IV and its Connection with Si IV
Zhijie Qu, Ryan Lindley, Joel N. Bregman
We compose a 265-sight line MW C IV line shape sample using the HST/COS archive, which is complementary to the existing Si IV samples. C IV has a higher ionization potential ($47 -…
Hot Extended Galaxy Halos Around Local L* Galaxies From Sunyaev-Zeldovich Measurements
Joel N. Bregman, Edmund Hodges-Kluck, Zhijie Qu +3
Most of the baryons in L* galaxies are unaccounted for and are predicted to lie in hot gaseous halos (T ~ 3E6 K) that may extend beyond R200. A hot gaseous halo will produce a ther…
Probing the He II re-Ionization ERa via Absorbing C IV Historical Yield (HIERACHY) I: A Strong Outflow from a z~4.7 Quasar
Xiaodi Yu, Jiang-Tao Li, Zhijie Qu +7
Outflows from super-massive black holes (SMBHs) play an important role in the co-evolution of themselves, their host galaxies, and the larger scale environments. Such outflows are…
An X-ray and SZ bright diffuse source toward M31: a Local Hot Bridge
Zhijie Qu, Rui Huang, Joel N. Bregman +1
We report a large-scale () X-ray and Sunyaev-Zeldovich (SZ)-bright diffuse enhancement toward M31, which might be a Local Hot Bridge connecting the Milky Way (MW…
The Warm Gas in the MW: A Kinematical Model
Zhijie Qu, Joel N. Bregman, Edmund Hodges-Kluck +2
We develop a kinematical model for the Milky Way Si IV-bearing gas to determine its density distribution and kinematics. This model is constrained by a column density line shape sa…
The warm Gaseous Disk and the Anisotropic Circumgalactic Medium of the Milky Way
Zhijie Qu, Joel N. Bregman
The warm () gas is an important gaseous component in the galaxy baryonic cycle. We built a 2-dimension disk-CGM model to study the warm gas distribution of the Milk…
{\it HST}/COS Observations of the Warm Ionized Gaseous Halo of NGC 891
Zhijie Qu, Joel N. Bregman, Edmund J. Hodges-Kluck
The metallicity of galactic gaseous halos provides insights into accretion and feedback of galaxies. The nearby edge-on galaxy NGC 891 has a multi-component gaseous halo and a back…
The Mass and Absorption Columns of Galactic Gaseous Halos II -- The High Ionization State Ions
Zhijie Qu, Joel N. Bregman
The high ionization-state ions trace the hot gases in the universe, of which gaseous halos around galaxies are a major contributor. Following Qu & Bregman (2018), we calculate the…
The Extended Distribution of Baryons Around Galaxies
Joel N. Bregman, Michael E. Anderson, Matthew J. Miller +5
We summarize and reanalyze observations bearing upon missing galactic baryons, where we propose a consistent picture for halo gas in L >~ L* galaxies. The hot X-ray emitting halos…
The Mass and Absorption Columns of Galactic Gaseous Halos
Zhijie Qu, Joel N. Bregman
The galactic gaseous halo is a gas reservoir for the interstellar medium in the galaxy disk, supplying materials for star formation. We developed a gaseous halo model connecting th…
A hot gaseous galaxy halo candidate with Mg X absorption
Zhijie Qu, Joel N. Bregman
The hot gas in galaxy halos may account for a significant fraction of missing baryons in galaxies, and some of these gases can be traced by high ionization absorption systems in QS…