量化和理解恆星形成過程中的變異

量化和理解恆星形成過程中的變異


COLLOQUIUM:- Quantifying and Understanding Variations in the Star Formation Process
 
Star formation is a multi-physics, multi-scale process. This multiplicity of physical processes and ales that are involved can generate a significant amount of scatter in the outcome of star formation, in particular in terms of key quantities such as the stellar initial mass function(IMF), the star formation rate(SFR), and the star formation efficiency(SFE). By analyzing large data sets that are becoming increasingly available, one can now assess whether variations do actually exist, quantify them, and attempt to explain them via a comparison with(a range of) theoretical models. The speaker will illustrate this by presenting examples related to the IMF in young Galactic stellar clusters and to the star formation scaling relations in nearby galaxies. He will show that current data argues against a universal IMF in Galactic stellar clusters, and that the star formation scaling relations on galactic scales should include a description of the role of several other physical quantities, instead of being understood in terms of a mere dependence of the SFR on the density of the star forming gas. 
 
時間:2019.05.10(五) 16:00~17:00
地點:香港中文大學 邵逸夫夫人樓LT6
講者:Dr. Sami Marcel DIB(Niels Bohr International Academy, Niels Bohr Institute, Denmark)
語言:英語

免費會議,歡迎參加

此活動由香港中文大學物理系主辦。