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CMZoom II: Catalog of Compact Submillimeter Dust Continuum Sources in the Milky Way's Central Molecular Zone

Hatchfield, HP, Battersby, C, Keto, E, Walker, D, Barnes, A, Callanan, D, Ginsburg, A, Henshaw, JD, Kauffmann, J, Kruijssen, JMD, Longmore, SN, Lu, X, Mills, EAC, Pillai, T, Zhang, Q, Bally, J, Butterfield, N, Contreras, YA, Ho, LC, Ott, J , Patel, N and Tolls, V CMZoom II: Catalog of Compact Submillimeter Dust Continuum Sources in the Milky Way's Central Molecular Zone. The Astrophysical Journal Supplement Series. ISSN 1538-4365 (Accepted)

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Abstract

In this paper we present the CMZoom Survey's catalog of compact sources (< 10'', ~0.4pc) within the Central Molecular Zone (CMZ). CMZoom is a Submillimeter Array (SMA) large program designed to provide a complete and unbiased map of all high column density gas (N(H$_2$) $\geq$ 10$^{23}$ cm$^{-2}$) of the innermost 500pc of the Galaxy in the 1.3mm dust continuum. We generate both a robust catalog designed to reduce spurious source detections, and a second catalog with higher completeness, both generated using a pruned dendrogram. In the robust catalog, we report 285 compact sources, or 816 in the high completeness catalog. These sources have effective radii between 0.04-0.4 pc, and are the potential progenitors of star clusters. The masses for both catalogs are dominated by the Sagittarius B2 cloud complex, where masses are likely unreliable due to free-free contamination, uncertain dust temperatures, and line-of-sight confusion. Given the survey selection and completeness, we predict that our robust catalog accounts for more than ~99% of compact substructure capable of forming high mass stars in the CMZ. This catalog provides a crucial foundation for future studies of high mass star formation in the Milky Way's Galactic Center.

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
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Date Deposited: 28 Sep 2020 11:37
Last Modified: 28 Sep 2020 11:45
URI: https://researchonline.ljmu.ac.uk/id/eprint/13734

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