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research article

3d Cmz. I. Central Molecular Zone Overview

Battersby, Cara
•
Walker, Daniel L.
•
Barnes, Ashley
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May 9, 2025
Astrophysical Journal

The Central Molecular Zone (CMZ) is the largest reservoir of dense molecular gas in the Galaxy and is heavily obscured in the optical and near-IR. We present an overview of the far-IR dust continuum, where the molecular clouds are revealed, provided by Herschel in the inner 40 degrees (divided by l divided by < 20 degrees) of the Milky Way with a particular focus on the CMZ. We report a total dense gas (N(H-2) > 10(23) cm(-2)) CMZ mass of M-circle dot and confirm that there is a highly asymmetric distribution of dense gas, with about 70%-75% at positive longitudes. We create and publicly release complete fore/background-subtracted column density and dust temperature maps in the inner 40 degrees (divided by l divided by < 20 degrees) of the Galaxy. We find that the CMZ clearly stands out as a distinct structure, with an average mass per longitude that is at least 3x higher than the rest of the inner Galaxy contiguously from 18 > & ell; > -13. This CMZ extent is larger than previously assumed, but is consistent with constraints from velocity information. The inner Galaxy's column density peaks towards the SgrB2 complex with a value of about 2 x 10(24) cm(-2), and typical CMZ molecular clouds are about N(H-2) similar to 10(23) cm(-2). Typical CMZ dust temperatures range from similar to 12-35 K with relatively little variation. We identify a ridge of warm dust in the inner CMZ that potentially traces the base of the northern Galactic outflow seen with MEERKAT.

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Type
research article
DOI
10.3847/1538-4357/adb5f0
Web of Science ID

WOS:001485158200001

Author(s)
Battersby, Cara

Harvard University

Walker, Daniel L.

University of Connecticut

Barnes, Ashley

European Southern Observatory

Ginsburg, Adam

State University System of Florida

Lipman, Dani

University of Connecticut

Alboslani, Danya

University of Connecticut

Hatchfield, H. Perry

National Aeronautics & Space Administration (NASA)

Bally, John

University of Colorado System

Glover, Simon C. O.

Ruprecht Karls University Heidelberg

Henshaw, Jonathan D.

Liverpool John Moores University

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Date Issued

2025-05-09

Publisher

IOP Publishing Ltd

Published in
Astrophysical Journal
Volume

984

Issue

2

Article Number

156

Subjects

GALACTIC-CENTER REGION

•

STAR-FORMATION

•

HI-GAL

•

DATA RELEASE

•

TEMPERATURE STRUCTURE

•

DYNAMICAL MODEL

•

MAGNETIC-FIELDS

•

COLUMN-DENSITY

•

DATA REDUCTION

•

THERMAL DUST

•

Science & Technology

•

Physical Sciences

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
GALSPEC  
FunderFunding(s)Grant NumberGrant URL

National Science Foundation (NSF)

1816715;2108938;2206510;CAREER 2145689

National Science Foundation (NSF)

80NSSC22K1125

National Aeronautics and Space Administration through the Astrophysics Data Analysis Program

AST 2008101;2206511;CAREER 2142300

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Available on Infoscience
May 30, 2025
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/250901
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