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CMZoom IV. Incipient High-Mass Star Formation Throughout the Central Molecular Zone

Hatchfield, HP, Battersby, C, Barnes, AT, Butterfield, N, Ginsburg, A, Henshaw, JD, Longmore, SN, Lu, X, Svoboda, B, Walker, D, Callanan, D, Mills, EAC, Ho, LC, Kauffmann, J, Kruijssen, JMD, Ott, J, Pillai, T and Zhang, Q CMZoom IV. Incipient High-Mass Star Formation Throughout the Central Molecular Zone. Astrophysical Journal. ISSN 0004-637X (Accepted)

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Abstract

In this work, we constrain the star-forming properties of all possible sites of incipient high-mass star formation in the Milky Way's Galactic Center. We identify dense structures using the CMZoom 1.3mm dust continuum catalog of objects with typical radii of ~0.1pc, and measure their association with tracers of high-mass star formation. We incorporate compact emission at 8, 21, 24, 25, and 70um from MSX, Spitzer, Herschel, and SOFIA, catalogued young stellar objects, and water and methanol masers to characterize each source. We find an incipient star formation rate (SFR) for the CMZ of ~0.08 M⊙ yr^{-1} over the next few 10^5 yr. We calculate upper and lower limits on the CMZ's incipient SFR of ~0.45 M⊙ yr^{-1} and ~0.05 M⊙ yr^{-1} respectively, spanning between roughly equal to and several times greater than other estimates of CMZ's recent SFR. Despite substantial uncertainties, our results suggest the incipient SFR in the CMZ may be higher than previously estimated. We find that the prevalence of star formation tracers does not correlate with source volume density, but instead ~>75% of high-mass star formation is found in regions above a column density ratio (NSMA/NHerschel) of ~1.5. Finally, we highlight the detection of ``atoll sources'', a reoccurring morphology of cold dust encircling evolved infrared sources, possibly representing HII regions in the process of destroying their envelopes.

Item Type: Article
Uncontrolled Keywords: astro-ph.GA; astro-ph.GA
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: American Astronomical Society; IOP Publishing
Related URLs:
SWORD Depositor: A Symplectic
Date Deposited: 16 Jan 2024 10:40
Last Modified: 16 Jan 2024 10:40
URI: https://researchonline.ljmu.ac.uk/id/eprint/22287
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