科学研究
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2023.05.24
Toward Accurate Metallicity Measurements in ISM and Distribution of HI in CGM from 3D Spectroscopy
Galaxies in the universe are intricately connected to the gas in and around galaxies. Accurately measuring the statistical properties of this gas is crucial for testing modern theories of galaxy formation and evolution. In this talk, I will present our recent efforts to characterize interstellar and circumgalactic media using integral field spectroscopy with high sensitivity in two aspects. 1) ...
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2023.05.23
Binaries of the first stars as progenitors of compact object mergers
A grand challenge for modern astrophysics is to understand star and galaxy formation in the first billion years of cosmic history. In particular, the first generation of stars born in extremely metal-poor/free primordial gas, the so-called population III (Pop III), are believed to have distinct features compared with present-day stars: They are more likely to become massive black holes due thei...
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2023.05.18
A Minimalistic View of How Galaxies Live, Breathe, and Die
Despite the diversity in the histories of individual galaxies, most of them live slow and die fast. I will firstly introduce a systematic exploration of the galaxy-halo connection, aiming to search for deviations in the spatial distribution of galaxies from the simplest halo model prediction. The null detection paves the way for us to identify the key driver of galaxy quenching within the same...
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2023.05.17
脉冲星自转减慢和高速中子星：中子超流涡旋体的中微子辐射及其效应
1)首先介绍近年来脉冲星观测的(P-Pdot)图同国际流行的脉冲星自转减慢的磁偶极辐射理论(标准模型)预言的明显矛盾。其次介绍1982年我们提出的中子超流涡旋体的中微子辐射理论模型。2) 在1982年我们的理论基础上,我们提出了这五十年来天文观测发现的高速中子星的物理起源于我们的 “中子超流涡旋体的中微子辐射喷流模型”。Host: Tipei L
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2023.05.12
The Evolution of All Stable Isotopes within Galaxies Across Cosmic Time
In the past decade, Galactic Chemical Evolution (GCE) has flourished due to surveys like Gaia, LAMOST, and Galex, which have enabled detailed investigations of stellar abundances. Stellar nucleosynthesis has also made strides in calculating both stable and radioactive isotopes, including the heavy isotopes produced by rapid neutron-capture (r-process). However, the astrophysical sources of r-p...
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