Deconstructing the High-Mass Star-Forming Region IRAS 23033+5951

Abstract

We report interferometric observations of the high-mass star-forming object IRAS 23033+5951. Our observations reveal two massive molecular cloud cores, designated IRAS 23033+5951-MMS1 and IRAS 23033+5951-MMS2. MMS1 has already formed a massive protostar and MMS2 appears to be on the verge of doing so. The latter core may be an example of a massive analogue to a "Class 0" star-forming object. The more evolved core shows some evidence of N2H+ destruction near the protostar, consistent with similar findings in low-mass star-forming objects. In addition to the already-known prominent HCO+ outflow, our SiO 2--1, and CH3OH 2--1 maps show evidence for two more candidate outflows, both presumably less powerful than the main one. Both cores are embedded in an elongated feature whose major axis is oriented almost exactly perpendicular to the axis of the most prominent outflow in the region. Although it has many of the characteristics of a disk, the 87,000 AU (0.42 pc) diameter of this structure suggests that it is more likely to be the flattened, rotating remnant of the natal molecular cloud fragment from which the star-forming cores condensed. We conclude that IRAS 23033+5951 is an excellent example of massive star formation proceeding in relative isolation, perhaps by the method of monolithic collapse and disk accretion.

Accepted for publication in the Astrophysical Journal

References in corpus (26)

• Theory of Star Formation
• The Formation of Massive Stars from Turbulent Cores
• Competitive accretion in embedded stellar cluster
• On the Formation of Massive Stars
• High-Mass Proto-Stellar Candidates - II : Density structure from dust continuum and CS emission
• High-Mass Proto-Stellar Candidates - I : The Sample and Initial Results
• Massive molecular outflows
• Massive star formation: Nurture, not nature
• N2H+ and C18O Depletion in a Cold Dark Cloud
• Dense Gas and Star Formation: Characteristics of Cloud Cores Associated with Water Masers
• Accretion in stellar clusters and the IMF
• A disk of dust and molecular gas around a high-mass protostar
• Evolution of Chemistry and Molecular Line Profile during Protostellar Collapse
• CH3OH and H2O masers in high-mass star-forming regions
• The Circumstellar Environment of High Mass Protostellar Objects. III Evidence of Infall?
• Radiation Feedback and Fragmentation in Massive Protostellar Cores
• Rotating disks in high-mass young stellar objects
• The Circumstellar Environments of High-Mass Protostellar Objects I: Submillimetre Continuum Emission
• Imaging chemical differentiation around the low-mass protostar L483-mm
• Quiescent Dense Gas in Protostellar Clusters: the Ophiuchus A Core
• Massive molecular outflows at high spatial resolution
• How to Identify Pre-Protostellar Cores
• Testing the massive disk scenario for IRAS 18089-1732
• NGC7538S - a High-Mass Protostar with a Massive Rotating Disk
• Chemical differentiation in regions of high-mass star formation I. CS, dust and N2H^+ in southern sources
• The rotating molecular core and precessing outflow of the young stellar object Barnard 1c

Cited by in corpus (9)

• Rotation of the Warm Molecular Gas Surrounding Ultracompact HII Regions
• N2H+ depletion in the massive protostellar cluster AFGL 5142
• Multiple monopolar outflows driven by massive protostars in IRAS 18162-2048
• Tracing early evolutionary stages of high-mass star formation with molecular lines
• First interferometric study of enhanced N-fractionation in N${}_2$H${}^{+}$: the high-mass star-forming region IRAS 05358+3543
• Fragmentation, rotation and outflows in the high-mass star-forming region IRAS 23033+5951. A case study of the IRAM NOEMA large program CORE
• Testing the Evolutionary Sequence of High Mass Protostars with CARMA
• A large, massive, rotating disk around an isolated young stellar object
• Search for High-Mass Protostellar Objects in Cold IRAS Sources