Kendrew, S, Ginsburg, A, Johnston, K orcid.org/0000-0003-4509-1180 et al. (4 more authors) (2013) Early-stage Massive Star Formation near the Galactic Centre: Sgr C. The Astrophysical Journal, 775 (2). L50. ISSN 2041-8205
Abstract
We present near-infrared spectroscopy and 1 mm line and continuum observations of a recently identified site of high mass star formation likely to be located in the Central Molecular Zone (CMZ) near Sgr C. Located on the outskirts of the massive evolved H II region associated with Sgr C, the area is characterized by an Extended Green Object (EGO) measuring ~10'' in size (0.4 pc), whose observational characteristics suggest the presence of an embedded massive protostar driving an outflow. Our data confirm that early-stage star formation is taking place on the periphery of the Sgr C H II region, with detections of two protostellar cores and several knots of H2 and Brackett γ emission alongside a previously detected compact radio source. We calculate the cores' joint mass to be ~103 M ☉, with column densities of 1-2 × 1024 cm–2. We show the host molecular cloud to hold ~105 M ☉ of gas and dust with temperatures and column densities favorable for massive star formation to occur, however, there is no evidence of star formation outside of the EGO, indicating that the cloud is predominantly quiescent. Given its mass, density, and temperature, the cloud is comparable to other remarkable non-star-forming clouds such as G0.253 in the eastern CMZ.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | (c) 2013, The American Astronomical Society. Reproduced in accordance with the publisher's self-archiving policy. |
Keywords: | infrared; ISM – ISM; jets and outflows; stars; formation |
Dates: |
|
Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Astrophysics (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 09 Feb 2017 10:35 |
Last Modified: | 09 Feb 2017 10:35 |
Published Version: | https://doi.org/10.1088/2041-8205/775/2/L50 |
Status: | Published |
Publisher: | American Astronomical Society |
Identification Number: | 10.1088/2041-8205/775/2/L50 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:112163 |