High-mass star formation studies in ALMA era and the TOP-SCOPE survey of Planck cold clumps

High-mass stars play a major role in Galaxy formation and evolution. However, their formation is still far from well known due to their large distances.  Two models for high-mass star formation are very popular in recent years, "core accretion model" and "competitive accretion model". I will talk about how to distinguish these two models from observations. Especially, I will talk about our efforts on high-mass star formation studies in the ALMA era. In addition, to better understand the initial conditions in the process of star formation, we are conducting a series of surveys toward  thousands of Planck Galactic Cold Clumps (PGCCs) . The low dust temperature (<14 K) of PGCCs makes them likely to be pre-stellar objects or at the very initial stage of protostellar collapse. "TOP-SCOPE" are joint survey programs targeting at Planck Cold Clumps. "TOP", standing for "TRAO Observations of Planck cold clumps", aims at an unbiased CO/13CO survey of 2000 Planck Galactic Cold Clumps with the Taeduk Radio Astronomy Observatory 14-meter telescope. "SCOPE", standing for "SCUBA-2 Continuum Observations of Pre-protostellar Evolution", is a legacy survey using SCUBA-2 onboard of the James Clerk Maxwell Telescope (JCMT) at East Asia Observatory (EAO) to survey 1000 Planck galactic cold clumps at 850 micron. We are also actively developing follow-up observations with other ground-based telescopes (NRO 45-m, Effelsberg 100-m, IRAM 30-m. SMT, KVN, SMA, ALMA). We aim to statistically study the initial conditions of star formation and cloud evolution in various kinds of environments. I will present the progress and the future plans of this internationally collaborating project.

Tie Liu (KISA)
1st floor meeting room, KIAA
Fri, 2018-03-09 12:00 to 13:00