Spectral line survey toward the young massive protostar ngc 2264 cmm3 in the 4 mm, 3 mm, and 0.8 mm bands

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

研究成果: Article査読

24 被引用数 (Scopus)


Spectral line survey observations are conducted toward the high-mass protostar candidate NGC 2264 CMM3 in the 4, 3, and 0.8 mm bands with the Nobeyama 45 m telescope and the Atacama Submillimeter Telescope Experiment (ASTE) 10 m telescope. In total, 265 emission lines are detected in the 4 and 3 mm bands, and 74 emission lines in the 0.8 mm band. As a result, 36 molecular species and 30 isotopologues are identified. In addition to the fundamental molecular species, many emission lines of carbon-chain molecules such as HC5N, C4H, CCS, and C3S are detected in the 4 and 3 mm bands. Deuterated molecular species are also detected with relatively strong intensities. On the other hand, emission lines of complex organic molecules such as HCOOCH3 and CH3OCH3 are found to be weak. For the molecules for which multiple transitions are detected, rotation temperatures are derived to be 7-33 K except for CH3OH. Emission lines with high upper-state energies (Eu > 150 K) are detected for CH3OH, indicating the existence of a hot core. In comparison with the chemical composition of the Orion KL, carbon-chain molecules and deuterated molecules are found to be abundant in NGC 2264 CMM3, while sulfur-bearing species and complex organic molecules are deficient. These characteristics indicate the chemical youth of NGC 2264 CMM3 in spite of its location at the center of the cluster forming core, NGC 2264 C.

ジャーナルAstrophysical Journal
出版ステータスPublished - 2015 8月 20

ASJC Scopus subject areas

  • 天文学と天体物理学
  • 宇宙惑星科学


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