Research
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2025.03.26
Design, Testing, and Commissioning of the Sun Yat-sen University 80 cm Infrared Telescope [EN]
The Sun Yat-sen University (SYSU) 80cm infrared telescope is designed for near-infrared time-domain observations. It’s primary scientific objectives include follow-up of transients such as supernovae, gamma-ray burst afterglows, tidal disruption events, and monitoring of brown dwarfs, AGNs and variable stars. The telescope has an 80cm diameter with f/8, and is capable of observing in J and K b...
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2025.03.19
Revealing the nature of IRAC Optical Dropouts in the Deep HSC fields [EN]
Using the data from the Spitzer Space Telescope in the Deep HSC fields, we have found a mysterious population of objects that are detected at SNR>5 in the 3-5 micron (IRAC ch1 and ch2) but are either very red with Y-ch1>3.5 or totally invisible in the much deeper optical. Their median magnitudes are 23.95 and 23.68 AB in ch1 and ch2, respectively; 6% of the objects are also detected in IRAC ch3...
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2025.03.07
Expect the unexpected – Augmented astrophysical models for black hole population studies
GW observations are now revealing the population of black holes via the detection of binary black hole mergers, and the numbers are set to grow rapidly in the coming years: the distribution of astrophysical properties of binary black holes provides a key to interpret their formation channels. In this regard, scientists have proposed a variety of models for the black hole distribution, broadly c...
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2025.03.03
Turbulent HI Gas Driven by the SN Bubbles [EN]
The interstellar medium (ISM) is turbulent, and the energy sources driving this turbulence, particularly in HI gas, remain uncertain. Recently, stellar feedback, especially from supernovae (SNe), has been proposed as a potential mechanism for energy injection into the ISM. However, the specific processes involved are still unclear and require observational evidence. Using deep HI datacubes from...
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2025.02.24
First Euclid High-z Quasars In the Wide Survey
Luminous high-z quasars provide direct probes of the buildup of supermassive black holes, the primeval massive galaxies hosting them, and the intergalactic medium during the epoch of reionization. Despite its extraordinary capabilities, a significant challenge remains: the lack of quasar samples at redshift larger than 7. The Euclid space telescope offers a promising avenue to enrich our quasar...
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