21厘米宇宙學過去、現在與未來

21厘米宇宙學過去、現在與未來


Seminar:- The Past, Present, and Future of 21cm Cosmology

Despite tremendous recent progress, gaps remain in our knowledge of our cosmic history. For example, we have yet to make direct observations of Cosmic Dawn or the subsequent Epoch of Reionization. Together, these represent the important period when the first stars and galaxies were formed, dramatically altering their surroundings in the process. Radio telescopes targeting the 21cm line will open up these crucial epochs to direct observations in the next few years, filling in a missing chapter in our cosmic story. The speaker will review our recent results from the field. These results have begun to place limits on heating processes during reionization. He will also motivate unconventional ideas in experiment design that have been proposed and implemented to deal with the unique technical challenges of 21cm cosmology. Cognizant of ‘lessons learned’ from the current generation of instruments, the speaker will describe our recently commenced Hydrogen Epoch of Reionization Array (HERA), including its forecasted promise to provide exquisite constraints on reionization astrophysics as well as on fundamental parameters such as the neutrino mass. 
 
時間:2017.12.27(三) 14:30 ~ 15:15
地點:香港中文大學 科學館北座G25室
講者:廖智仁 博士 Dr. Adrian LIU(University of California, Berkeley, USA & McGill University, Canada)
語言:英語

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此活動由香港中文大學物理系主辦。

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