本文章最後由 iheby 於 2016-4-26 14:33 編輯
原始宇宙之重力波 @香港中文大學物理系
Seminar:- Gravitational Waves from the Primordial Universe
The gravitational-wave astronomy has come with LIGO's observation of gravitational waves from a binary black hole merger. The primordial gravitational waves were generated at the inflationary stage of the Universe. They left imprints on the cosmic microwave background (CMB), and particularly induced the B-mode polarization. In this talk, I will report the present observational status of primordial gravitational waves and forecast the future discovery potential of several CMB polarization experiments.
時間：2016.04.07(四) 15:30 ~ 16:15
地點：香港中文大學 科學館L3演講廳
講者：Dr. Sai WANG 王賽 博士 (Institute of Theoretical Physics, Chinese Academy of Sciences, China)
語言：英語
免費會議，歡迎公眾參加
低溫電子學在射電天文系統中的應用 @香港中文大學物理系
Seminar:- Cryogenic Electronics for Applications in Radio Astronomy Systems
Sensitivity is one of the key specification of the receiver performance which is determined by the noise in the receiver output. As a first stage component in a receiver system, low noise amplifier (LNA) plays a critical role in determining the overall performance of the system. In order to improve the noise of the receiver system, cryogenic cooling of the receivers has been commonly adopted especially for radio astronomy applications. Hence, the techniques of operating electronics at cryogenic temperature have been studied to achieve the best performance. In this seminar, those techniques used in developing the cryogenic receiver systems will be introduced and discussed.
時間：2016.04.13(三) 14:30 ~ 15:30
地點：香港中文大學 科學館北座G25室
講者：Mr. Su-Wei CHANG 張書維 (Radio Frequency Nanoelectronics Group, University of Massachusetts Amherst, USA)
語言：英語
免費會議，歡迎公眾參加
【講者】
【漢名】
超大質量黑洞 - 星系形成和演化的衝擊 @香港中文大學物理系
Seminar:- Supermassive Black Holes: Impact on Galaxy Formation and Evolution
Supermassive black holes, weighing between millions to billions times the mass of the Sun, are believed to power quasars and other energetic activity in the centers of galaxies. With the help of advanced telescopes from the ground and in space, operating across the electromagnetic spectrum, astronomers have now discovered that supermassive black holes not only exist, but that they are very common and play a critical role in the formation and evolution of galaxies in the Universe. A class of intermediate-mass black holes has also been found. These "seeds" help us understand the formation and growth of supermassive black holes and the origin of quasars in the early Universe. Mergers of seed black holes will provide an important source of gravitational wave radiation that can be detected with upcoming experiments. I describe these recent discoveries, which are among the most important developments in astronomy and astrophysics during the past 15 years. I will emphasize the unique opportunities for the Chinese community.
時間：2016.04.22(五) 16:00 ~ 17:00
地點：香港中文大學 科學館L2演講廳
講者：Prof. Luis C. HO 何子山 教授 (The Kavli Institute for Astronomy and Astrophysics Peking University, China)
語言：英語
免費會議，歡迎公眾參加
【講者】
|
