CMZoom: Survey Overview and First Data Release

Abstract

We present an overview of the CMZoom survey and its first data release. CMZoom is the first blind, high-resolution survey of the Central Molecular Zone (CMZ; the inner 500 pc of the Milky Way) at wavelengths sensitive to the pre-cursors of high-mass stars. CMZoom is a 500-hour Large Program on the Submillimeter Array (SMA) that mapped at 1.3 mm all of the gas and dust in the CMZ above a molecular hydrogen column density of 10^23 cm^-2 at a resolution of ~3" (0.1 pc). In this paper, we focus on the 1.3 mm dust continuum and its data release, but also describe CMZoom spectral line data which will be released in a forthcoming publication. While CMZoom detected many regions with rich and complex substructure, its key result is an overall deficit in compact substructures on 0.1 - 2 pc scales (the compact dense gas fraction: CDGF). In comparison with clouds in the Galactic disk, the CDGF in the CMZ is substantially lower, despite having much higher average column densities. CMZ clouds with high CDGFs are well-known sites of active star formation. The inability of most gas in the CMZ to form compact substructures is likely responsible for the dearth of star formation in the CMZ, surprising considering its high density. The factors responsible for the low CDGF are not yet understood but are plausibly due to the extreme environment of the CMZ, having far-reaching ramifications for our understanding of the star formation process across the cosmos.

Accepted for Publication in ApJS

References in corpus (39)

• The mass distribution and gravitational potential of the Milky Way
• Giant Gamma-ray Bubbles from Fermi-LAT: AGN Activity or Bipolar Galactic Wind?
• Trigonometric Parallaxes Of High-Mass Star Forming Regions: Our View Of The Milky Way
• MAMBO Mapping of Spitzer c2d Small Clouds and Cores
• The present-day star formation rate of the Milky-Way determined from Spitzer detected young stellar objects
• The dynamical evolution of molecular clouds near the Galactic Centre - I. Orbital structure and evolutionary timeline
• The largest oxigen bearing organic molecule repository
• Star Formation in the Central 400 pc of the Milky Way: Evidence for a Population of Massive YSOs
• Magnetic Fields in High-Mass Infrared Dark Clouds
• The link between turbulence, magnetic fields, filaments, and star formation in the Central Molecular Zone cloud G0.253+0.016
• Fragmentation of Molecular Clumps and Formation of Protocluster
• Evidence for a Long-Standing Top-Heavy IMF in the Central Parsec of the Galaxy
• Organic Molecules in the Galactic Center. Hot Core Chemistry without Hot Cores
• A cluster in the making: ALMA reveals the initial conditions for high-mass cluster formation
• Turbulence sets the initial conditions for star formation in high-pressure environments
• 'The Brick' is not a brick: A comprehensive study of the structure and dynamics of the Central Molecular Zone cloud G0.253+0.016
• AUTO-MULTITHRESH: A General Purpose Automasking Algorithm
• The Survey of Water and Ammonia in the Galactic Center (SWAG): Molecular Cloud Evolution in the Central Molecular Zone
• The dynamical evolution of molecular clouds near the Galactic Centre - II. Spatial structure and kinematics of simulated clouds
• Nuclear Outflow of the Milky Way: Studying the Kinematics and Spatial Extent of the Northern Fermi Bubble
• Thermal Feedback in the high-mass star and cluster forming region W51
• The dynamics and star-forming potential of the massive Galactic centre cloud G0.253+0.016
• Abundant Methanol Masers but no New Evidence for Star Formation in GCM0.253+0.016
• Star Formation Rates of Massive Molecular Clouds in the Central Molecular Zone
• The almost ubiquitous association of 6.7 GHz methanol masers with dust
• Star formation in a high-pressure environment: An SMA view of the Galactic centre dust ridge
• The Onset of Massive Star Formation: The Evolution of Temperature and Density Structure in an Infrared Dark Cloud
• Main-sequence stars masquerading as Young Stellar Objects in the central molecular zone
• The Quintuplet Cluster III. Hertzsprung-Russell diagram and cluster age
• Young massive star cluster formation in the Galactic Centre is driven by global gravitational collapse of high-mass molecular clouds
• Isolated massive stars in the Galactic center: The dynamic contribution from the Arches and Quintuplet star clusters
• The dynamical evolution of molecular clouds near the Galactic Centre -- III. Tidally--induced star formation in protocluster clouds
• 3 mm spectral line survey of two lines of sight toward two typical cloud complexes in the Galactic Center
• An X-ray survey of the central molecular zone: variability of the Fe Ka emission line
• Origins of Scatter in the Relationship Between HCN 1-0 and Dense Gas Mass in the Galactic Center
• Absorption Filaments Towards the Massive Clump G0.253+0.016
• The CARMA 3mm Survey of the Inner $0.7^{\circ }\times 0.4^{\circ }$ of the Central Molecular Zone
• A 6.7 GHz methanol maser survey of the central molecular zone
• A Brief Update on the CMZoom Survey

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