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Journal Articles The Astrophysical Journal Supplement Series Year : 2021

Molecular Cloud Cores with High Deuterium Fractions: Nobeyama Mapping Survey

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Ken'Ichi Tatematsu
  • Function : Author
Gwanjeong Kim
  • Function : Author
Tie Liu
  • Function : Author
Neal J. Evans
  • Function : Author
Hee-Weon Yi
  • Function : Author
Jeong-Eun Lee
  • Function : Author
Yuefang Wu
  • Function : Author
Naomi Hirano
  • Function : Author
Sheng-Yuan Liu
  • Function : Author
Somnath Dutta
Dipen Sahu
  • Function : Author
Patricio Sanhueza
Kee-Tae Kim
Mika Juvela
  • Function : Author
L. Viktor Tóth
  • Function : Author
Orsolya Fehér
  • Function : Author
Jinhua He
  • Function : Author
Jixing Ge
  • Function : Author
Siyi Feng
Minho Choi
  • Function : Author
Miju Kang
  • Function : Author
Mark A. Thompson
  • Function : Author
Gary A. Fuller
  • Function : Author
Di Li
  • Function : Author
Ke Wang
James Di Francesco
David Eden
  • Function : Author
Satoshi Ohashi
Ryo Kandori
Tomoya Hirota
Takeshi Sakai
Xing Lu
Hiroko Shinnaga
Jungha Kim
  • Function : Author

Abstract

We present the results of on-the-fly mapping observations of 44 fields containing 107 SCUBA-2 cores in the emission lines of molecules N2H+, HC3N, and CCS at 82-94 GHz using the Nobeyama 45 m telescope. This study aimed at investigating the physical properties of cores that show high deuterium fractions and might be close to the onset of star formation. We found that the distributions of the N2H+ and HC3N line emissions are approximately similar to the distribution of the 850 μm dust continuum emission, whereas the CCS line emission is often undetected or is distributed in a clumpy structure surrounding the peak position of the 850 μm dust continuum emission. Occasionally (12%), we observe CCS emission, which is an early-type gas tracer toward the young stellar object, probably due to local high excitation. Evolution toward star formation does not immediately affect the nonthermal velocity dispersion.

Dates and versions

insu-03672390 , version 1 (19-05-2022)

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Ken'Ichi Tatematsu, Gwanjeong Kim, Tie Liu, Neal J. Evans, Hee-Weon Yi, et al.. Molecular Cloud Cores with High Deuterium Fractions: Nobeyama Mapping Survey. The Astrophysical Journal Supplement Series, 2021, 256, ⟨10.3847/1538-4365/ac0978⟩. ⟨insu-03672390⟩
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