[NCTS Astrophysics Lunch Seminar] Investigating star formation from an all-sky IR survey

Title:Investigating star formation from an all-sky IR survey
Time:2023/08/25 (Fri.) 12:10
4F Lecture Hall, Cosmology Hall, NTU
Webex online (Meeting number:2557 124 4532 / Password:TG23 (8423 from phones and video systems))

The star formation rate (SFR) of giant molecular clouds (GMCs) in the Milky Way is important for determining the mechanism of star formation in the interstellar medium (ISM). To map the complete distribution of young stellar objects (YSOs) in the nearby galactic region, we applied supervised machine learning algorithms with a highly self-consistency training dataset to identify YSO candidates from the Wide-field Infrared Survey Explorer all-sky catalogue (ALLWISE). We successfully extended the SFR-gas relation of nearby regions to a larger range of gas density compared to previous Spitzer-related studies. The SFR-virial parameter relation of nearby GMCs shows no evidence for analytical magnetic-field-dominated models or supersonic-turbulence-dominated models. We proposed that the low SFR in the Milky Way has to be described by a combination of different supporting mechanisms on the scale of GMCs.

*registration(for onsite) will be closed at 08/23(Wed.)12:00 noon.