科学研究
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2023.11.21
High contrast imaging science with coronagraphic instruments
While high-contrast imaging surveys in the past decade have produced only a handful of self-luminous exoplanets, they opened new gates for studying the forming environments of planetary systems. With multi-epoch and multi-wavelength imaging, I will talk about our ongoing efforts on scientific expeditions using current flagship observatories. They include (1) pinpointing the orbits of hidden pla...
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2023.11.17
Robust detection of the hot phase WHIM emission with eRASS
The highly ionized warm/hot intergalactic medium (WHIM) permeating the vast space of the cosmic filaments is one of the least explored baryon contents in the local Universe. The properties of the WHIM in long cosmic filaments with lengths reaching up to 20-100Mpc, which account for >80% of the total filament volume and 50% of the baryonic mass, remain to be explored. In this work, we examine th...
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2023.11.17
SRG/eROSITA Lockman Hole Survey: X-ray Sources Classification and Obscured AGN Candidates
Lockman Hole field is an area in the sky with an extremely low column density of neutral hydrogen on the line of sight (Lockman et al., 1986). This outstanding characteristic turns Lockman Hole into a perfect window to observe extragalactic sources. The SRG/eROSITA space telescope conducted a deep X-ray survey in this area during the performance verification phase in 2019.My talk will be divide...
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2023.11.16
Probing cosmic dawn from the ground to the lunar orbit
Various 21 cm signals from neutral hydrogen have been proposed to probe the cosmic dawn, including the global 21 cm spectrum, the 21 cm tomography, and the 21 cm forest. They will provide valuable insights into the early structure formation during the cosmic dawn, and have been identified as the key scientific goals for a number of ground-based and space-borne radio experiments, including the i...
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2023.11.14
The star formation, dust, and abundance of galaxies with CIB cross-correlations
The cosmic infrared background (CIB) is the accumulated infrared radiation mainly generated from dust emissions in star-forming galaxies. It bears rich information about star formation history, dust thermodynamics, and galaxy abundance in the distant Universe. The CIB auto- and cross-correlations with other large-scale structure (LSS) tracers have been used to probe the star formation, dust, an...
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