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Molecular cloud cores with high deuterium fractions: Nobeyama mapping survey

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.3847/1538-4365/ac0978
AuthorSearch for: ORCID identifier: https://orcid.org/0000-0002-8149-8546; Search for: ORCID identifier: https://orcid.org/0000-0003-2011-8172; Search for: ORCID identifier: https://orcid.org/0000-0002-5286-2564; Search for: ORCID identifier: https://orcid.org/0000-0001-5175-1777; Search for: ORCID identifier: https://orcid.org/0000-0003-0537-5461; Search for: ORCID identifier: https://orcid.org/0000-0003-3119-2087; Search for: ; Search for: ORCID identifier: https://orcid.org/0000-0001-9304-7884; Search for: ORCID identifier: https://orcid.org/0000-0003-4603-7119; Search for: ORCID identifier: https://orcid.org/0000-0002-2338-4583; Search for: ORCID identifier: https://orcid.org/0000-0002-4393-3463; Search for: ORCID identifier: https://orcid.org/0000-0002-7125-7685; Search for: ORCID identifier: https://orcid.org/0000-0003-2412-7092; Search for: ORCID identifier: https://orcid.org/0000-0002-5809-4834; Search for: ORCID identifier: https://orcid.org/0000-0002-5310-4212; Search for: ORCID identifier: https://orcid.org/0000-0003-3453-4775; Search for: ORCID identifier: https://orcid.org/0000-0002-3938-4393; Search for: ORCID identifier: https://orcid.org/0000-0002-9600-1846; Search for: ORCID identifier: https://orcid.org/0000-0002-4707-8409; Search for: ; Search for: ORCID identifier: https://orcid.org/0000-0002-5016-050X; Search for: ORCID identifier: https://orcid.org/0000-0001-5392-909X; Search for: ORCID identifier: https://orcid.org/0000-0001-8509-1818; Search for: ORCID identifier: https://orcid.org/0000-0003-3010-7661; Search for: ; Search for: ORCID identifier: https://orcid.org/0000-0002-7237-3856; Search for: 1ORCID identifier: https://orcid.org/0000-0002-9289-2450; Search for: ORCID identifier: https://orcid.org/0000-0002-5881-3229; Search for: ORCID identifier: https://orcid.org/0000-0002-9661-7958; Search for: ORCID identifier: https://orcid.org/0000-0003-2610-6367; Search for: ; Search for: ORCID identifier: https://orcid.org/0000-0003-1659-095X; Search for: ORCID identifier: https://orcid.org/0000-0003-4521-7492; Search for: ORCID identifier: https://orcid.org/0000-0003-2619-9305; Search for: ; Search for: ORCID identifier: https://orcid.org/0000-0001-9407-6775; Search for: ORCID identifier: https://orcid.org/0000-0002-9933-2851; Search for:
Affiliation
  1. National Research Council of Canada. Herzberg Astronomy and Astrophysics
FormatText, Article
Subjectinterstellar clouds
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.
Publication date
PublisherIOP
In
  • The Astrophysical Journal Supplement Series 256, no. 2 (17 September 2021).
LanguageEnglish
Peer reviewedYes
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Record identifier42533f7e-f955-403f-b6d5-7a7ccd43a204
Record created2023-01-27
Record modified2023-01-27
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