【T. D. Lee Colloquium No.27】FAST survey for pulsars and new discoveries
by
Tsung-Dao Lee Institute/S5F-S500 - Lecture Hall
Tsung-Dao Lee Institute
Tencent meeting link: https://meeting.tencent.com/dm/48NPEAt60Get (meeting ID: 817 238 395 no password)
Host: Prof. Dong Lai （赖东）
Abstract:
Pulsars are compact stellar remnants formed after the evolution and collapse of massive stars. These highly dense objects typically emit regular pulses of electromagnetic radiation. Since their first discovery in 1968, many fundamental questions remain unanswered --- for instance, how many pulsars exist in the Milky Way, and how the pulsed emission is generated within the magnetosphere of a neutron star. Some pulsars have rotational periods as short as a few milliseconds, and others are found in binary systems with companion stars. Precise timing observations of millisecond pulsars provide a powerful tool for testing theories of gravity. The Five-hundred-meter Aperture Spherical radio Telescope (FAST) possesses the largest effective collecting area for radio waves among existing telescopes. Equipped with a 19-beam L-band receiver and a system temperature of approximately 20 K, FAST is currently the most sensitive instrument for pulsar detection. We are conducting the Galactic Plane Pulsar Snapshot (GPPS) survey to systematically search for new pulsars. To date, the survey has discovered over 800 pulsars, including 180 millisecond pulsars and 7 Fast Radio Bursts (see http://zmtt.bao.ac.cn/GPPS/). Many of these newly discovered pulsars are of particular astrophysical interest, offering novel insights into the properties and evolution of neutron stars and the extreme physics associated with them.
Bio：
Professor Han Jinlin is chief of the Radio Astronomy Division at the National Astronomical Observatories of China, Chair Scientist of the Research Group for Compact Objects and Diffuse Medium , Adjunct Professor at Peking University and Nanjing University, and Lecture Chair Professor at the University of Chinese Academy of Sciences. JinLin Han studied radio energineering in Southeast University of China in Nanjing, and then did his master on Astro-instrumentation in Shanghai Astronomical Observatory. In 1989, he move to Beijing Astronomical Observatory (now the headquart of the National Astronomical Observatories of Chinese Academy of Sciences) to work on PhD thesis on magnetic fields of the Milky Way, and got PhD degree in 1993. After then he has been working there, with only a 1-year scholar exchange program to visit Max-Planck-Institute for Radioastronomy in Bonn, Germany. He has made pioneering constribution to the understanding of the large-scale magnetic dields of galaxies. In the last five years he dedicated to the FAST survey of the Milky Way, discovered 800 pulsars and revealed unprecidented details of the interstallar medium. He has received numerous honors, including the National Science Fund for Distinguished Young Scholars, the Chinese Academy of Sciences (CAS) Young Scientist Award, the CAS Hundred Talents Program, the CAS Outstanding Graduate Supervisor Award, the First Prize of Beijing Science and Technology Progress Award, the Zhang Yuzhe Award of the Chinese Astronomical Society, the National Awards for Excellent Scientific and Technological Worker, the Leading Talent of the National "Ten Thousand Talents Program", and the Second Prize of the National Natural Science Award.
