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.

Accepted for publication in ApJ, 7 figures, 2 tables

References in corpus (6)

• The ALMA Protostellar Interferometric Line Survey (PILS): First results from an unbiased submillimeter wavelength line survey of the Class 0 protostellar binary IRAS 16293-2422 with ALMA
• The Evolution of Outflow-Envelope Interactions in Low-Mass Protostars
• Constraining the abundances of complex organics in the inner regions of solar-type protostars
• Complex organics in IRAS 4A revisited with ALMA and PdBI: Striking contrast between two neighbouring protostellar cores
• Discovery of a Hot Corino in the Bok Globule B335
• Probing the formation of intermediate- to high-mass stars in protoclusters II. Comparison between millimeter interferometric observations of NGC 2264-C and SPH simulations of a collapsing clump

Cited by in corpus (8)

• 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
• Investigation of Chemical Differentiation among the NGC2264 Cluster-Forming Clumps
• Spectrometer Using superconductor MIxer Receiver (SUMIRE) for Laboratory Submillimeter Spectroscopy
• Clump-scale chemistry in the NGC2264-D cluster-forming region
• 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