2026年第15次学术报告：Disks, Winds and Outflows from Nearby Low Mass protostars
报告题目：Disks, Winds and Outflows from Nearby Low Mass protostars
主讲嘉宾：Diego Mardones 副教授 (智利大学)
报告时间：2026年7月15日 11:00
报告地点：台本部南楼210会议室
报告邀请人：葛继兴
报告摘要：
I will present the results of an ALMA survey of southern, nearby low mass protostars in cloud environments. A total of 125 protostars in nearby molecular clouds were surveyed in ALMA Band 6 in high resolution (0.1 arcsec) dust continuum and moderate resolution (1 arcsec) CO 2--1 maps. The survey covers spatial scales from 40 to 6000 au. I will show statistics and morphology of disk dust emission (Hsieh et al) and protostellar multiplicity (in preparation). I will also characterize the observed molecular outflows and argue against a simple outflow evolution as a function of Tbol. I will also present some of the star formation research carried out at University of Chile and give a small tribute to my closest friends and collaborators from China.
主讲嘉宾简介：
Dr. Diego Mardones is Associate Profesor at the Astronomy Department, Universidad de Chile. He obtained his PhD from Harvard University in 1998 with a thesis on the detection of infall motions in dense molecular gas tracers towards nearby low mass protostars under the supervision of Phil Myers. Since then, he has worked in the characterization of the dense gas in early stages of massive star formation in the Milky Way using dust continuum and molecular line tracers primarily using first the SEST and APEX single dish telescopes in Chile and ALMA during the past decade. This work on massive star formation has been in collaboration with Profs. Guido Garay and Leonardo Bronfman from Universidad de Chile and eventually led to extensive collaborations led by Dr. Liu Tie, now at SHAO and other colleagues from China. In the years 2008-2009 he was on sabbatical leave at the UNAM (Mexico) where he worked with Prof. Javier Ballesteros on the radiation transfer of molecular lines and Yale University (USA) where he worked on low mass protostellar outflows with Prof. Hector Arce. In 2014-2018 Prof. Mardones led the implementation of the Chilean Virtual Observatory in collaboration with computer scientists and astronomers from 5 Chilean universities and ALMA. In 2018-2019 Prof. Mardones was on sabbatical in the Center for Astrochemical Studies at the Max Planck Institute for Extraterrestrial Physics in Garching (Germany) led by Prof. Paola Caselli. His work on astrochemistry has been in close collaboration with Prof. Natalia Inostroza-Pino (now in the Chemistry Department, Universidad de Chile), and Dr. Ge Jixing, now at XAO. Today, he still works on sub-mm wavelength observations of dense gas and outflows from low and high mass star forming regions, radiation transfer and astrochemistry.