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Welcome!
I am an astronomer at University of Massachusetts
Amherst. Here you can get a glimpse of my research
activtities.
How galaxies get their gas and how much mass, energy, and
metals galaxies return to their surroundings are questions
central to our understanding of galaxies and the
intergalactic medium. Only stars synthesize metals. Yet
only about half of the generated elements are found in
stars and the interstellar medium. Galaxies are also
missing their share of baryonic matter. Understanding
the flows of the matter/energy in and around
galaxies, or their "ecosystem'', is the focus
of my research.
A key to the understanding of the matter and energy flows
is the study of various high-energy feedback processes in
galaxies. I have concentrated on four closely-related
aspects of this research topic:
- examining various high-energy sources of the
interstellar medium (e.g., supernova remnants,
superbubbles, and galactic nuclear regions);
- characterizing the global structure as well as
the physical and chemical states of hot gas in and
around galaxies;
- investigating the interplay of the hot gas with
other galactic components;
- exploring the interaction of galaxies with their
environment, particularly the intragroup/cluster
media.
I primarily uses radio, infrared, ultraviolet, and
X-ray observations to conduct these studies. I also carry
out theoretical and computational studies with my students
and collaborators.
Brief
CV CV_longer
version (including publication)
Research Projects
- Galactic Nuclear Regions:
- Systematic X-ray study of the Galactic
supermassive black hole Sgr A*
- Variability study of stars in the Galactic center
- Multi-band infrared mapping of the Galactic nuclear
region
- Large Millimeter Telescope Mapping of the
Galactic Central Molecular Zone
- Chandra mapping of the Galactic bulge/center
interface
- Galactic Feedback and Ecosystem of Galaxies:
- Chandra X-ray Visionary Program (3 Ms) of the 30
Dorado Nebula
- Multi-wavelength study of M31 nucleus and bulge
- Multi-wavelength study of edge-on galaxies,
including CHANG-ES (Continuum HAlos in Nearby
Galaxies -- an EVLA Survey), as well as
Chandra/XMM-Newton Surveys
- Hubble/COS spectroscopic and X-ray studies of the
QSO/galaxy cluster pairs.
- Sunyaev-Zel'dovich Effect of Galaxy Clusters at the
Highest Redshifts: LMT High-Resolution Mapping
Students and Postdocs
Selected recent
invited talks
-
- Multi-wavelength
views of the Galactic Center , Universidad de
Chile, 2018
-
Joint Examination of the Galactic Heart via
Computer Simulations & Multiwavelength
Observations, Fulbright Chile enhancement,
Sandiago 2018
- Time-domain
astrophysics of galactic nuclei in radio to
submillimeter, in the 3rd PANDA Symposium
on Time Domain Astronomy, Chengdu, 2018
- Exploring
dust properties in extreme conditions, Beijing
Normal University, 2018
- Probing Black Hole
Astrophysics through Gravitational Lensing,
University of Missouri, 2018
- Flows and Flares
around the Nearest Massive Black Hole -- Sgr A*,
AAS, Austin, 2017
- Probing
the Lifecycle of Nearby Galactic Nuclei via
High-resolution X-ray Imaging and Spectroscopy,
in From
Chandra to Lynx: Taking the Sharpest X-ray Vision
Fainter and Farther, Cambridge,
2017
- X-raying galactic
feedback in nearby disk galaxies, Center for
Astrophysics, 2017
- Cosmic Structure
Formation: far-UV/Soft X-ray spectroscopy,
Tsinghua University, 2016
- Sgr A*: new
insights
from X-ray observations, Institute de
Astrofisica de Andalucia - CSIC, Granada, Spain, 2016
- X-ray spectroscopy
of nearby galactic nuclear region, at
the Chandra workshop X-ray spectroscopy of nearby
galactic nuclear regions, Cambrige, 2015
- Widefield
high-resolution multiwavelength imaging of our
Galactic center, University of Potsdam, 2015
- Feedback
from
starbursts:
30
Dorado
as
a case study, McCray Symposium (Bern), 2015
- A close-up of the
nearest supermasive black hole --- Sgr A*,
at Astronomical Institute of the Academy of Sciences
(Prague, Czech), 2015
- Hot Ecosystem of Disk
Galaxies, University of Pittsburg, 2014
- Galactic Neighborhood
and (Chandra-enabled) X-ray Astrophysics, in
15-year Chandra Conference, Boston, 2014
- The astronomical
frontier problems of cosmic-ray origins, Beijing
Cosmic-ray conference, 2014
- LMT/AzTEC 1.1-mm
Observations of the Galactic Center, LMT
workshop, 2014
- Everyday Life of
Supermassive Black Holes: A Long X-ray Close-up of
Sgr A*, University of Maryland, 2013
- X-raying
Galaxy Ecosystems, Institute of Astronomy,
Cambridge University, UK, 2013
- Supernovae
and the Galactic Ecosystem in the IAU Symposium
296, "Supernova Environmental Impacts", Raichak,
India, 2013
- X-ray
imaging and spectroscopy of the hot CGM in local
galaxies in the workshop on “Dynamic Baryons in
Halos”, Leiden, Netherlands, 2012
- Sources of X-ray
Emission from Galaxies in
“The
Spectral
Energy
Distribution
of
Galaxies'',
IAU Symposium 284, Preston, UK, 2011
- X-ray Spectroscopy
of Hot Plasma in and around Galaxies,
Astrophysics Science Division, NASA/Goddard Space
Flight Center, 2011
- Galactic
Neighborhood
and Laboratory Astrophysics, in the 2010
NASA Laboratory Astrophysics Workshop, Gatlinburg,
Tennessee
- Living alongside
Monsters: Stellar and Interstellar Matter
around SMBHs in the ISM2010 workshop,
Beijing Kavli Institute for Astronomy
and Astrophysics, 2010
- X-raying the Global Hot
Interstellar and Circum-galactic Media in
the workshop on High-Resolution X-Ray Spectroscopy:
Past, Present, and Future, 2010, Utrcht
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