科学研究
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2023.12.01
The UV luminosity function at 0.6 < z < 1 from UVCANDELS
UVCANDELS is a HST Cycle-26 Treasury Program awarded 164 orbits of primary ultraviolet (UV) F275W imaging and coordinated parallel optical F435W imaging in four CANDELS fields: GOODS-N, GOODS-S, EGS, and COSMOS, covering a total area of ～426 arcmin^2. This is ～2.7 times larger than the area covered by previous deep-field space UV data combined, reaching a depth of about 27 and 28 ABmag (5 \si...
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2023.11.30
Exploring the blinking universe with FAST
Fast radio bursts (FRBs) are the brightest millisecond-duration-astronomical transients in radio bands with yet unknown origin. I will briefly review the development process of the field of fast radio bursts and introduce how we use FAST to study fast radio bursts. We reveal systematic frequency evolution of repeating FRBs, namely depolarization toward lower frequencies, which can be well descr...
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2023.11.27
Multi-Messenger Probes on Dark Matter Beyond WIMPs
We will discuss two promising dark matter scenarios: axion-like particle dark matter and primordial black hole dark matter. We begin with radio telescope probes on axion-like dark matter. We will discuss the axion-photon conversion around neutron stars which results in the radio emission and the 21 cm probes through the effects on large scale structure formation suppression. We then turn our at...
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2023.11.24
Directly detecting dark matter and neutron stars with gravitational waves
The third observing run of advanced LIGO, Virgo and KAGRA brought unprecedented sensitivity towards a variety of quasi-monochromatic, persistent gravitational-wave signals. Continuous waves allow us to probe not just the canonical asymmetrically rotating neutron stars, but also different forms of dark matter, thus showing the wide-ranging astrophysical implications of using a relatively simple ...
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2023.11.24
Tidal Disruption Events: Probes of Accretion Physics and Black Hole Demographics
Tidal disruption events (TDEs) provide unique laboratories to study the demographics, immediate stellar and gaseous environments, and accretion physics of the massive black hole population. Over the past few years, time domain sky surveys such as the optical Zwicky Transient Facility (ZTF) have led to a surge of TDE discoveries in galaxy centers. This talk highlights our efforts to constrain th...
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