천문학회보 (The Bulletin of The Korean Astronomical Society)
- 제40권2호
- /
- Pages.53.2-53.2
- /
- 2015
- /
- 1226-2692(pISSN)
Molecular environments of a Planck Cold Clump: G108.8-00.8
- Kim, Jungha (School of Space Research, Kyung Hee University) ;
-
Lee, Jeong-Eun
(School of Space Research, Kyung Hee University) ;
- Liu, Tie (Korea Astronomy and Space Science Institute (KASI)) ;
-
Kim, Kee-Tae
(Korea Astronomy and Space Science Institute (KASI)) ;
- Menten, Karl (Max-Planck-Institute fur Radioastronomie) ;
- Wu, Yuefang (Department of Astronomy, Peking University) ;
- Thompson, Mark (Centre for Astrophysics Research, Science & Technology research Institute, University of Hertfordshire) ;
- Yuan, Sheng (Academia Sinica Institute of Astronomy and Astrophysics (ASIAA))
- 발행 : 2015.10.15
초록
We present preliminary results from a series of observations toward G108.8-00.8, which is one of Planck Cold Clumps and a promising candidate of massive prestellar cores. In the integrated intensity map of SCUBA 850 micron dust continuum emission, highly fragmented structures appear. These are distributed along one long filamentary structure seen in the CO 1-0 and 13CO 1-0 integrated intensity maps obtained with the PMO 13.7 m telescope. The northern part of the filament is divided into two parts, as seen in the CO 2-1, 13CO 2-1, and C18O 2-1 integrated intensity maps obtained with the CSO 10 m telescope. The observations of HCO+ 1-0, N2H+ 1-0, and HCN 1-0 with the IRAM 30 m telescope focus on the northern part of the CSO maps, which show a head-tail structure. NH3 (1,1) also shows similar distribution with IRAM maps. The depletion factors, derived by the comparison between the dust continuum and C18O 2-1 emission, varies from 1.5 to 6 over the region, suggesting different evolutionary status of each component. To study the chemical and physical environments of G108.8-00.8, more detailed analysis is in progress.
키워드