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Astrochemical Properties of Planck Cold Clumps
Ken'ichi Tatematsu, Tie Liu, Satoshi Ohashi +25
We observed thirteen Planck cold clumps with the James Clerk Maxwell Telescope/SCUBA-2 and with the Nobeyama 45 m radio telescope. The NH distribution obtained with the Nob…
Star formation laws in both Galactic massive clumps and external galaxies: An extensive study with dust continuum, HCN (4-3), and CS (7-6)
Tie Liu, Kee-Tae Kim, Hyunju Yoo +20
We observed 146 Galactic clumps in HCN (4-3) and CS (7-6) with the Atacama Submillimeter Telescope Experiment (ASTE) 10-m telescope. A tight linear relationship between star format…
Discovery of an extremely wide-angle bipolar outflow in AFGL 5142
Tie Liu, Qizhou Zhang, Kee-Tae Kim +12
Most bipolar outflows are associated with individual young stellar objects and have small opening angles. Here we report the discovery of an extremely wide-angle (180$\arcdeg…
L1599B: Cloud Envelope and C+ Emission in a Region of Moderately Enhanced Radiation Field
Paul F. Goldsmith, Jorge L. Pineda, William D. Langer +4
We study the effects of an asymmetric radiation field on the properties of a molecular cloud envelope. We employ observations of carbon monoxide (12CO and 13CO), atomic carbon, ion…
Interactions of the Infrared bubble N4 with the surroundings
Hong-Li Liu, Jin-Zeng Li, Yuefang Wu +11
The physical mechanisms that induce the transformation of a certain mass of gas in new stars are far from being well understood. Infrared bubbles associated with HII regions have b…
Dense gas in molecular cores associated with Planck Galactic cold clumps
Jinghua Yuan, Yuefang Wu, Tie Liu +7
We present the first survey of dense gas towards Planck Galactic Cold Clumps (PGCCs). Observations in the J=1-0 transitions of HCO+ and HCN towards 621 molecular cores associated w…