Seminar:- Quasar-Galaxy Evolution, Feeding, and Feedback: State of the Art and Outlook
Understanding how quasars and their host galaxies co-evolve during the peak cosmic epoch is critical to studies of massive galaxy evolution. In this talk the speaker will present three complementary data-driven collaborations in which she has played leading roles, that probe the circumgalactic medium, dust-reddened quasars, and associated line-of-sight absorbers. First, She studies projected pairs of quasars in which the background quasar sightline passes close to the foreground quasar and probes its circumgalactic medium in absorption. High-resolution, high-Signal-to-Noise-ratio(high-S/N) spectroscopy quantitatively measures the physical and kinematic properties of the cool gas. Second, she studies a population of dust-reddened quasars called "extremely red quasars" that display markedly different properties from normal quasars. Adaptive-optics integral-field spectroscopy resolves their ionized gas outflows and interstellar medium, while wide-field integral-field spectroscopy reveals their extended gaseous halos. Third, she has initiated a study of gas inflows toward quasar-host galaxies. By measuring accurate systemic redshifts for the hosts, inflows can be detected via associated absorption lines along the line-of-sight at redshifted velocities. She will conclude with her outlook on observational astronomy and ways students can engage, from the perspective of a Chinese University of Hong Kong-educated(CUHK-educated) researcher.
時間：2025.07.30(三) 11:00~12:00
地點：香港中文大學 科學館北座* G26室
講者：Dr. Marie LAU Wing-Yee 劉詠儀 博士 (Physics & Astronomy Department, University of California, Riverside, US)
語言：英語
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【此屬轉載信息，以主事單位發布為準】
*Science Centre North Block, CUHK
此活動由香港中文大學物理系主辦。
https://wp.phy.cuhk.edu.hk/wp-content/uploads/25-07-30sem-Lau-MWY.pdf