Astrochemical Properties of Planck Cold Clumps

Show full item record



Permalink

http://hdl.handle.net/10138/179110

Citation

Tatematsu , K , Liu , T , Ohashi , S , Sanhueza , P , Quang Nguyen Luong , Hirota , T , Liu , S-Y , Hirano , N , Choi , M , Kang , M , Thompson , M A , Fuller , G , Wu , Y , Li , D , Di Francesco , J , Kim , K-T , Wang , K , Ristorcelli , I , Juvela , M , Shinnaga , H , Cunningham , M , Saito , M , Lee , J-E , Toth , L V , He , J , Sakai , T , Kim , J , JCMT Large Program SCOPE Collabora & TRAO Key Science Program TOP Colla 2017 , ' Astrochemical Properties of Planck Cold Clumps ' , Astrophysical Journal Supplement Series , vol. 228 , no. 2 , 12 . https://doi.org/10.3847/1538-4365/228/2/12

Title: Astrochemical Properties of Planck Cold Clumps
Author: Tatematsu, Ken'ichi; Liu, Tie; Ohashi, Satoshi; Sanhueza, Patricio; Quang Nguyen Luong; Hirota, Tomoya; Liu, Sheng-Yuan; Hirano, Naomi; Choi, Minho; Kang, Miju; Thompson, Mark A.; Fuller, Gary; Wu, Yuefang; Li, Di; Di Francesco, James; Kim, Kee-Tae; Wang, Ke; Ristorcelli, Isabelle; Juvela, Mika; Shinnaga, Hiroko; Cunningham, Maria; Saito, Masao; Lee, Jeong-Eun; Toth, L. Viktor; He, Jinhua; Sakai, Takeshi; Kim, Jungha; JCMT Large Program SCOPE Collabora; TRAO Key Science Program TOP Colla
Contributor organization: Department of Physics
Date: 2017-02
Language: eng
Number of pages: 20
Belongs to series: Astrophysical Journal Supplement Series
ISSN: 0067-0049
DOI: https://doi.org/10.3847/1538-4365/228/2/12
URI: http://hdl.handle.net/10138/179110
Abstract: We observed 13 Planck cold clumps with the James Clerk Maxwell Telescope/SCUBA-2 and with the Nobeyama 45 m radio telescope. The N2H+ distribution obtained with the Nobeyama telescope is quite similar to SCUBA-2 dust distribution. The 82 GHz HC3N, 82 GHz CCS, and 94 GHz CCS emission are often distributed differently with respect to the N2H+ emission. The CCS emission, which is known to be abundant in starless molecular cloud cores, is often very clumpy in the observed targets. We made deep single-pointing observations in DNC, (HNC)-C-13, N2D+, and cyclic-C3H2 toward nine clumps. The detection rate of N2D+ is 50%. Furthermore, we observed the NH3 emission toward 15 Planck cold clumps to estimate the kinetic temperature, and confirmed that most targets are cold (less than or similar to 20 K). In two of the starless clumps we observed, the CCS emission is distributed as it surrounds the N2H+ core (chemically evolved gas), which resembles the case of L1544, a prestellar core showing collapse. In addition, we detected both DNC and N2D+. These two clumps are most likely on the verge of star formation. We introduce the chemical evolution factor (CEF) for starless cores to describe the chemical evolutionary stage, and analyze the observed Planck cold clumps.
Subject: ISM: clouds
ISM: molecules
ISM: structure
stars: formation
MOLECULAR CLOUD CORES
STAR-FORMING REGIONS
INFRARED DARK CLOUDS
45-M RADIO TELESCOPE
DENSE CORES
DEUTERIUM FRACTIONATION
CHEMICAL VARIATION
MAPPING OBSERVATIONS
PHYSICAL CONDITIONS
ANGULAR-MOMENTUM
115 Astronomy, Space science
Peer reviewed: Yes
Rights: unspecified
Usage restriction: openAccess
Self-archived version: publishedVersion


Files in this item

Total number of downloads: Loading...

Files Size Format View
Tatematsu_2017_ApJS_228_12.pdf 3.569Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record