科学研究
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2023.06.05
The DESI Damped Lyα System Survey: Data Release 1
We present the results of a Damped Lyman α (DLA) system survey in the Dark Energy Spectroscopic Instrument (DESI) Survey Data release 1. The concordance DLA catalog combines the prediction from two fully automated techniques: the convolutional neural network (CNN) model and the Gaussian Process (GP) model. For each absorber, we obtain an accurate measurement of the redshift, the HI column dens...
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2023.06.02
A LOFAR Look at Bent Double Lobed Radio Sources: Probing Differences in the Properties of Bent Radio AGNs Inside and Outside of High-z Galaxy Clusters
Bent radio AGN, with their classic “C” shaped morphology, are a unique class of radio AGNs. These radio sources are often used as signposts of a dense, gaseous medium, such as the intracluster medium (ICM). However, bent sources are found inside and outside cluster environments, raising the question of how environment impacts bent radio AGN morphology. We analyzed new LOw-Frequency Array Two-...
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2023.06.01
Feeding and feedback of the supermassive blackhole in brightest cluster galaxies
The intracluster medium (ICM) is the largest reservoir of the hot baryons. The centers of the ICM often feature a sharp X-ray surface brightness peak. AGN mechanical feedback from the brightest cluster galaxy is likely preventing the hot ICM from the catastrophic cooling, although the exact feedback process remains poorly understood. A growing number of kiloparsec-scale multiphase filaments hav...
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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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2023.05.26
The Long-term Monitoring Results of Insight-HXMT in the First 4 yr Galactic Plane Scanning Survey
The first X-ray source catalog of the Insight-HXMT Galactic Plane (∣b∣
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