Discovery of Striking Difference of Molecular-Emission-Line Richness in the Potential Proto-Binary System NGC 2264 CMM3

Abstract

We have conducted an interferometric line survey in the 0.8 mm band toward the young high-mass protostar candidate NGC 2264 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.

arXiv commentAccepted for publication in ApJ, 7 figures, 2 tables

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Cited by in corpus (10)

• First Hot Corino detected around an Isolated Intermediate-Mass Protostar: Cep\,E-mm
• FAUST II. Discovery of a Secondary Outflow in IRAS 15398-3359: Variability in Outflow Direction during the Earliest Stage of Star Formation?
• Molecular analysis of a high-mass prestellar core candidate in W43-MM1
• Chemical Differentiation and Temperature Distribution on a Few au Scale around the Protostellar Source B335
• Infall and Outflow Motions towards a Sample of Massive Star Forming Regions from the RMS Survey
• Investigation of Chemical Differentiation among the NGC2264 Cluster-Forming Clumps
• Spectrometer Using superconductor MIxer Receiver (SUMIRE) for Laboratory Submillimeter Spectroscopy
• Exploring the 100 au Scale Structure of the Protobinary System NGC 2264 CMM3 with ALMA
• Rotating Motion of the Outflow of IRAS 16293-2422 A1 at its Origin Point near the Protostar
• Clump-scale chemistry in the NGC2264-D cluster-forming region