Research
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2023.05.29
Galaxy/Quasar-Dark-Matter-Halo Connection of DESI: A Generalized Subhalo Abundance Matching Approach for Multiple Tracers
LCDM is the standard model of modern cosmology with two dark components, dark matter and dark energy. The nature of dark energy and the dark matter structure growth rate can be probed via the large-scale structure (LSS). For this purpose, we observe millions of spectra of galaxies and quasars (QSOs) with spectroscopic galaxy surveys to explore the 3D map of the Universe. Meanwhile, high-resolut...
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2023.05.25
Identification of exotic binaries in globular clusters
I will present my work on identifying faint X-ray sources in multiple Galactic globular clusters (GCs). These X-ray sources could be close binaries hosting compact stellar remnants (white dwarfs, black holes, and neutron stars) and magnetically active binaries. For some GCs, we incorporate deep radio imaging data in our analyses to reveal potential candidates of millisecond pulsars and accretin...
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2023.06.12
The Power of Milky Way's Stellar Streams Enabled by Multi-Object Spectroscopic Surveys
In this talk, I will discuss two ongoing spectroscopic programs to study the stellar streams in our Milky Way and highlight a few latest scientific results from these two programs. The Southern Stellar Stream Spectroscopic Survey (S5), started in 2018, is the first systematic program pursuing a complete census of known streams in the Southern Hemisphere. The science results from S5 include a ho...
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2023.05.22
Mysteries of fast radio bursts
Making use of exponential increases in computing power and memory per dollar, radio astronomers have been able to search larger areas of sky with ever higher bandwidth at high time and frequency resolution. In 2007, a mysterious millisecond-duration burst was found around the cellphone band. This kind of signal is now known as fast radio burst (FRB), energetic bursts visible at a cosmological d...
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2023.05.16
Quasar Luminosity Function & Single-Epoch Black Hole Mass Estimation
Quasars, luminous extra-galactic sources powered by accreting super-massive black holes (SMBH), have become increasingly important for probing the distant universe due to the growing number of spectroscopically confirmed quasars. My research focuses on exploring the statistical properties and evolution of quasars through careful analysis of their luminosity and black hole mass. In this talk, I ...
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