Korean VLBI Network (KVN)



2015 Seminar List:


01/23/2015   01/30/2015   02/13/2015   02/27/2015   03/20/2015   04/10/2015   05/08/2015   05/15/2015   05/22/2015   05/29/2015   06/05/2015   06/12/2015   07/03/2015   07/24/2015   07/31/2015   08/07/2015   08/28/2015   09/04/2015   09/18/2015   09/25/2015   10/02/2015   10/30/2015   11/06/2015   11/27/2015  

Date
06/05/2015
Speaker
Ms. Hyun-Joo Ryu (CNU/Radio Research Group)
Title
Infall Motions of High-mass Star-forming Cores
Abstract

It has been well established that gravitational collapse, accretion disks, and bipolar outflows are basic building blocks in the formation process of low-mass stars.

However, it is still much debated whether high-mass stars form in a similar manner to low-mass stars. In order to investigate the infall motions (gravitational collapse) of high-mass star-forming regions, we performed single-pointing observations of 83 high-mass protostellar object candidates in the HCO+(1-0), HCO+(3-2), HCN(3-2), H2CO(2-1) and H13CO+(1-0) lines.

We detected infall signatures in the HCO+(1-0) transition for a statistically significant number of the sources, and found 29 infall candidates. In this talk, we will report the preliminary results and discuss the implications for high-mass star formation.


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Korean VLBI Network (KVN)