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2018-05-11 Abstract
Time: 11th May, 2018 (Friday)
Venue: R521, IoA, 2nd General Building 綜二館R521
15:00 Student report:
Speaker: Chia-Lin Ko 柯嘉琳
"Magnetic fields in Bok globules: Multi-wavelength polarimetry as tracer across large spatial scales"
15:30 Speaker Dr. Meng-Ru Wu (吳孟儒, 中研院物理所)
Institute Of Physics, Academia Sinica
Title: The Gold mine of the universe: r-process nucleosynthesis in explosive astrophysical events
The astrophysical site hosting the formation of elements heavier than iron, including Silver, Gold and Uranium, via the rapid neutron-capture process (r-process) has been debated for many decades. Remarkable similarity of the abundance patterns found in metal-poor stars and in the Solar system suggests a rather robust condition under which these elements are produced across the cosmic time. Over the past few years, owing to the advances of theoretical development and various observational hints, the prevalent paradigm shifted largely from core-collapse supernovae to the merger of compact objects - binary neutron stars or one neutron star with one black hole. In this talk, I will first introduce the basic concept and ingredients of the r-process nucleosynthesis. I will then discuss some of the recent evidences and discoveries which are relevant for identifying the r-process sites. I will also speak about the challenges and opportunities lying ahead.