The SEDIGISM survey: Molecular clouds in the inner Galaxy
Review article, 2021

We use the 13CO(2-1) emission from the SEDIGISM (Structure, Excitation, and Dynamics of the Inner Galactic InterStellar Medium) high-resolution spectral-line survey of the inner Galaxy, to extract the molecular cloud population with a large dynamic range in spatial scales, using the Spectral Clustering for Interstellar Molecular Emission Segmentation (SCIMES) algorithm. This work compiles a cloud catalogue with a total of 10 663 molecular clouds, 10 300 of which we were able to assign distances and compute physical properties. We study some of the global properties of clouds using a science sample, consisting of 6664 well-resolved sources and for which the distance estimates are reliable. In particular, we compare the scaling relations retrieved from SEDIGISM to those of other surveys, and we explore the properties of clouds with and without high-mass star formation. Our results suggest that there is no single global property of a cloud that determines its ability to form massive stars, although we find combined trends of increasing mass, size, surface density, and velocity dispersion for the sub-sample of clouds with ongoing high-mass star formation. We then isolate the most extreme clouds in the SEDIGISM sample (i.e. clouds in the tails of the distributions) to look at their overall Galactic distribution, in search for hints of environmental effects. We find that, for most properties, the Galactic distribution of the most extreme clouds is only marginally different to that of the global cloud population. The Galactic distribution of the largest clouds, the turbulent clouds and the high-mass star-forming clouds are those that deviate most significantly from the global cloud population. We also find that the least dynamically active clouds (with low velocity dispersion or low virial parameter) are situated further afield, mostly in the least populated areas. However, we suspect that part of these trends may be affected by some observational biases (such as completeness and survey limitations), and thus require further follow up work in order to be confirmed.

Stars: Formation

Galaxy: Structure

ISM: Clouds

Galaxies: ISM, star formation

Author

A. Duarte-Cabral

Cardiff University

Korea Astronomy and Space Science Institute

D. Colombo

Max Planck Society

Korea Astronomy and Space Science Institute

J. S. Urquhart

University Of Kent

Korea Astronomy and Space Science Institute

A. Ginsburg

Korea Astronomy and Space Science Institute

University of Florida

D. Russeil

Laboratoire d'Astrophysique de Marseille

Korea Astronomy and Space Science Institute

F. Schuller

Korea Astronomy and Space Science Institute

Max Planck Society

L. D. Anderson

West Virginia University

Korea Astronomy and Space Science Institute

P. J. Barnes

University of New England

Korea Astronomy and Space Science Institute

Space Science Institute

M. Beltrán

Arcetri Astrophysical Observatory

Korea Astronomy and Space Science Institute

H. Beuther

Max Planck Society

Korea Astronomy and Space Science Institute

S. Bontemps

Korea Astronomy and Space Science Institute

University of Bordeaux

Leonardo Bronfman

Korea Astronomy and Space Science Institute

University of Chile (UCH)

T. Csengeri

University of Bordeaux

Korea Astronomy and Space Science Institute

C. L. Dobbs

University of Exeter

Korea Astronomy and Space Science Institute

D. J. Eden

Korea Astronomy and Space Science Institute

Liverpool John Moores University

A. Giannetti

Max Planck Society

Korea Astronomy and Space Science Institute

J. Kauffmann

Massachusetts Institute of Technology (MIT)

Korea Astronomy and Space Science Institute

M. Mattern

Korea Astronomy and Space Science Institute

Max Planck Society

S. N.X. Medina

Korea Astronomy and Space Science Institute

Max Planck Society

K. M. Menten

Korea Astronomy and Space Science Institute

Max Planck Society

M. Y. Lee

Max Planck Society

Korea Astronomy and Space Science Institute

A. R. Pettitt

Korea Astronomy and Space Science Institute

Hokkaido University

Manuel Riener

Korea Astronomy and Space Science Institute

Max Planck Society

Andrew Rigby

Korea Astronomy and Space Science Institute

Cardiff University

A. Traficante

Istituto nazionale di astrofisica (INAF)

Korea Astronomy and Space Science Institute

V. S. Veena

University of Cologne

Korea Astronomy and Space Science Institute

M. Wienen

Max Planck Society

Korea Astronomy and Space Science Institute

F. Wyrowski

Korea Astronomy and Space Science Institute

Max Planck Society

C. Agurto

Korea Astronomy and Space Science Institute

European Southern Observatory Santiago

F. Azagra

Korea Astronomy and Space Science Institute

European Southern Observatory Santiago

R. Cesaroni

Arcetri Astrophysical Observatory

Korea Astronomy and Space Science Institute

Ricardo Finger

University of Chile (UCH)

Korea Astronomy and Space Science Institute

E. Gonzalez

European Southern Observatory Santiago

Korea Astronomy and Space Science Institute

T. Henning

Korea Astronomy and Space Science Institute

Max Planck Society

A. K. Hernandez

University of Wisconsin Madison

Korea Astronomy and Space Science Institute

Jouni Kainulainen

Max Planck Society

Korea Astronomy and Space Science Institute

Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics, Galactic Astrophysics

S. Leurini

Max Planck Society

INAF Osservatorio Astronomico di Cagliari

Korea Astronomy and Space Science Institute

S. Lopez

University of Florida

Korea Astronomy and Space Science Institute

F. Mac-Auliffe

Korea Astronomy and Space Science Institute

European Southern Observatory Santiago

P. Mazumdar

Max Planck Society

Korea Astronomy and Space Science Institute

S. Molinari

Istituto nazionale di astrofisica (INAF)

Korea Astronomy and Space Science Institute

F. Motte

Korea Astronomy and Space Science Institute

Université Grenoble Alpes

E. Muller

Korea Astronomy and Space Science Institute

Macquarie University

Quang Nguyen-Luong

Korea Astronomy and Space Science Institute

Massachusetts Institute of Technology (MIT)

Rodrigo Parra Barraza

European Southern Observatory Santiago

Korea Astronomy and Space Science Institute

J. P. Perez-Beaupuits

European Southern Observatory Santiago

Korea Astronomy and Space Science Institute

F.M. Montenegro-Montes

European Southern Observatory Santiago

Korea Astronomy and Space Science Institute

T. J.T. Moore

Liverpool John Moores University

Korea Astronomy and Space Science Institute

S. E. Ragan

Korea Astronomy and Space Science Institute

Cardiff University

A. Sanchez-Monge

University of Cologne

Korea Astronomy and Space Science Institute

A. Sanna

Korea Astronomy and Space Science Institute

Max Planck Society

P. Schilke

University of Cologne

Korea Astronomy and Space Science Institute

E. Schisano

Korea Astronomy and Space Science Institute

Istituto nazionale di astrofisica (INAF)

N. Schneider

Korea Astronomy and Space Science Institute

University of Cologne

Sümeyye Suri

University of Cologne

Korea Astronomy and Space Science Institute

L. Testi

Korea Astronomy and Space Science Institute

University of Cologne

Karl Torstensson

European Southern Observatory Santiago

Korea Astronomy and Space Science Institute

P. Venegas

European Southern Observatory Santiago

Korea Astronomy and Space Science Institute

Ke Wang

Korea Astronomy and Space Science Institute

Beijing University of Technology

A. Zavagno

Korea Astronomy and Space Science Institute

Laboratoire d'Astrophysique de Marseille

Monthly Notices of the Royal Astronomical Society

0035-8711 (ISSN) 1365-2966 (eISSN)

Vol. 500 3 3027-3049

Subject Categories

Meteorology and Atmospheric Sciences

Astronomy, Astrophysics and Cosmology

Other Physics Topics

DOI

10.1093/mnras/staa2480

More information

Latest update

1/21/2021