Discovery of Striking Difference of Molecular-emission-line Richness in the Potential Proto-binary System NGC 2264 CMM3

Yoshimasa Watanabe, Nami Sakai, Ana López-Sepulcre, Takeshi Sakai, Tomoya Hirota, Sheng Yuan Liu, Yu Nung Su, Satoshi Yamamoto

Research output: Contribution to journalArticle

Abstract

We have conducted an interferometric line survey in the 0.8 mm band toward the young high-mass protostar candidate NGC2264 CMM3 with ALMA. CMM3 is resolved into the two continuum peaks, CMM3A and CMM3B, at an angular separation of 0.′9. Thus, CMM3 is found to be a binary system candidate. We have detected molecular outflows associated with CMM3A and CMM3B each, indicating active star formation. In addition to the two peaks, six faint continuum peaks are detected around CMM3A and CMM3B, most of which are thought to be evolved low-mass protostars. CMM3A is found to be rich in molecular line emission including complex organic molecules such as HCOOCH3 and CH3OCH3. The emission of complex organic molecules is distributed within a compact region around the continuum peak of CMM3A. Hence, CMM3A apparently harbors a hot core. On the other hand, CMM3B is deficient in molecular line emission, although its continuum flux is almost comparable to that of CMM3A. Possible origins of the striking difference between CMM3A and CMM3B are discussed.

Original languageEnglish
Article numberaa88b6
JournalAstrophysical Journal
Volume847
Issue number2
DOIs
Publication statusPublished - 2017 Oct 1
Externally publishedYes

Keywords

  • ISM: clouds
  • ISM: individual objects (NGC 2264)
  • ISM: molecules
  • stars: protostars

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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