Research Project
Grant-in-Aid for Young Scientists (B)
Investigation of molecular chemistry in the Galactic central region and gas accretion to the nucleus has been conducted through observations of atomic/molecular lines in the millimeter and sumillimeter wavelengths. The immediate aim was to understand the origin of the cloud with atypically rich abundance of atomic carbon. We have performed a large scale mapping of the atomic carbon line using the ASTE 10-m telescope and a high-sensitivity and high-resolutional observation of atomic carbon in the circumnuclear reiong using ALMA. Chemical processes that determine the abundance of atomic carbon has been searched using a new method we have newly developed for this study. We have shown that the atomic carbon cloud is likely to trace gas streaming to the nucleus, but no evidence has been found for the effects of the cosmic-ray dissociation or mechanical dissociation. The atomic carbon cloud may provide a new means by which we observe gas accretion to the circumnuclear region.
All 2016 2015 2014
All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (7 results) (of which Int'l Joint Research: 3 results)
Astrophysical Journal
Volume: 806 Issue: 1 Pages: 130-142
10.1088/0004-637x/806/1/130
