Abstract
Abstract We confirmed the existence of a massive proto-cluster in G23.43−0.18 from our ALMA 1.3 mm continuum and molecular line observations. We resolved the region into 1 main massive protostellar object, G23.43−0.18 A, 1 intermediate mass protostellar object, G23.43−0.18 B, and 3 low mass objects, G23.43−0.18 C1, G23.43−0.18 C2 and G23.43−0.18 C3. A spiral arm structure is observed in G23.43−0.18 B. G23.43−0.18 A 1.3 mm dust continuum emission showed a “butterfly” morphology with clear evidence of the existence of a cavity and bipolar outflow with an inclination angle of 50○. G23.43−0.18 B presents a compact rotating structure, and possibly an inner Keplerian disk, traced with methanol lines and powers a jet revealed by multiple compact emission peaks in CO, indicating episodic ejections every 300 years. The presence of 6.7 GHz methanol masers in G23.43−0.18 A and G23.43−0.18 B are strong indications that both objects host massive protostars and are good sites to test some theories of the early evolutionary phases of massive stars.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
