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CMZoom III: Spectral Line Data Release

Callanan, D, Longmore, SN, Battersby, C, Hatchfield, HP, Walker, DL, Henshaw, J, Keto, E, Barnes, A, Ginsburg, A, Kauffmann, J, Kruijssen, D, Lu, X, Mills, EAC, Pillai, T, Zhang, Q, Bally, J, Butterfield, N, Contreras, YA, Ho, LC, Immer, K , Johnston, KG, Ott, J, Patel, N and Tolls, V (2023) CMZoom III: Spectral Line Data Release. Monthly Notices of the Royal Astronomical Society, 520 (3). pp. 4760-4778. ISSN 0035-8711

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We present an overview and data release of the spectral line component of the SMA Large Program, \textit{CMZoom}. \textit{CMZoom} observed 12CO(2-1), 13CO(2-1) and C18O(2-1), three transitions of H2CO, several transitions of CH3OH, two transitions of OCS and single transitions of SiO and SO, within gas above a column density of N(H2)≥1023\,cm−2 in the Central Molecular Zone (CMZ; inner few hundred pc of the Galaxy). We extract spectra from all compact 1.3\,mm \emph{CMZoom} continuum sources and fit line profiles to the spectra. We use the fit results from the H2CO 3(0,3)-2(0,2) transition to determine the source kinematic properties. We find ∼90\% of the total mass of \emph{CMZoom} sources have reliable kinematics. Only four compact continuum sources are formally self-gravitating. The remainder are consistent with being in hydrostatic equilibrium assuming that they are confined by the high external pressure in the CMZ. Based on the mass and density of virially bound sources, and assuming star formation occurs within one free-fall time with a star formation efficiency of 10%−75%, we place a lower limit on the future embedded star-formation rate of 0.008−0.06\,M⊙\,yr−1. We find only two convincing proto-stellar outflows, ruling out a previously undetected population of very massive, actively accreting YSOs with strong outflows. Finally, despite having sufficient sensitivity and resolution to detect high-velocity compact clouds (HVCCs), which have been claimed as evidence for intermediate mass black holes interacting with molecular gas clouds, we find no such objects across the large survey area.

Item Type: Article
Additional Information: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2023 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Uncontrolled Keywords: astro-ph.GA; astro-ph.GA
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: Oxford University Press
Related URLs:
SWORD Depositor: A Symplectic
Date Deposited: 24 Feb 2023 11:37
Last Modified: 24 Feb 2023 11:45
DOI or ID number: 10.1093/mnras/stad388
URI: https://researchonline.ljmu.ac.uk/id/eprint/18644
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