TY - JOUR
T1 - Discovery of Striking Difference of Molecular-emission-line Richness in the Potential Proto-binary System NGC 2264 CMM3
AU - Watanabe, Yoshimasa
AU - Sakai, Nami
AU - López-Sepulcre, Ana
AU - Sakai, Takeshi
AU - Hirota, Tomoya
AU - Liu, Sheng Yuan
AU - Su, Yu Nung
AU - Yamamoto, Satoshi
N1 - Funding Information:
We thank the anonymous reviewer for helpful comments and suggestions that improved this paper. This paper makes use of the ALMA data set ADS/JAO.ALMA#2013.1.01192.S. ALMA is a partnership of the ESO (representing its member states), the NSF (USA) and NINS (Japan), together with the NRC (Canada) and the NSC and ASIAA (Taiwan), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by the ESO, the AUI/NRAO and the NAOJ. The authors are grateful to the ALMA staff for their excellent support. This publication makes use of data products from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center, funded by the National Aeronautics and Space Administration and the National Science Foundation. This study has made use of the NASA/IPAC Infrared Science Archive, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. This study is supported by a Grant-in-Aid from the Ministry of Education, Culture, Sports, Science, and Technology of Japan (No. 25108005 and 16K17657). Facility: ALMA.
Publisher Copyright:
© 2017. The American Astronomical Society. All rights reserved.
PY - 2017/10/1
Y1 - 2017/10/1
N2 - 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.
AB - 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.
KW - ISM: clouds
KW - ISM: individual objects (NGC 2264)
KW - ISM: molecules
KW - stars: protostars
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U2 - 10.3847/1538-4357/aa88b6
DO - 10.3847/1538-4357/aa88b6
M3 - Article
AN - SCOPUS:85031118853
SN - 0004-637X
VL - 847
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
M1 - aa88b6
ER -