The SEDIGISM survey: Molecular clouds in the inner Galaxy

A Duarte-Cabral; D Colombo; J. S Urquhart; A Ginsburg; D Russeil; F Schuller; Lynn Anderson; P Barnes; M Beltran; H Beuther; S Bontemps; L Bronfman; T Csengeri; C L Dobbs; D Eden; A Giannetti; J Kauffmann; M Mattern; S-N X Medina; Karl M Menten; M. Y Lee; Alexander R. Pettitt; M Riener; A Rigby; A Traficante; V. S Veena; M Wienen; F Wyrowski; C Agurto; F Azagra; R Cesaroni; R Finger; Enid T Gonzalez-Orta; T Henning; A. K Hernandez; Jouni Kainulainen; S Leurini; S Lopez; F Mac-Auliffe; P Mazumdar; S Molinari; F Motte; E Muller; Q Nguyen-Luong; Rodrigo Parra Barraza; J-P Perez-Beaupuits; F. M Montenegro-Montes; T. J.T Moore; S Ragan; A Sanchez-Monge; A Sanna; P Schilke; E Schisano; N Schneider; S Suri; L Testi; K Torstensson; P Venegas; K Wang; A Zavagno

doi:10.1093/mnras/staa2480

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The SEDIGISM survey: Molecular clouds in the inner Galaxy

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The SEDIGISM survey: Molecular clouds in the inner Galaxy

A Duarte-Cabral, D Colombo, J. S Urquhart, A Ginsburg, D Russeil, F Schuller, Lynn Anderson, P Barnes, M Beltran, H Beuther, …

Monthly notices of the Royal Astronomical Society, Vol.500(3), pp.3027-3049

09/11/2020

DOI: https://doi.org/10.1093/mnras/staa2480

Handle:

https://hdl.handle.net/20.500.12741/rep:8607

Abstract

Annan fysik

Astronomi, astrofysik och kosmologi

Astronomy, Astrophysics and Cosmology

Galaxies: ISM, star formation

Galaxy: Structure

ISM: Clouds

Meteorologi och atmosfärforskning

Meteorology and Atmospheric Sciences

Other Physics Topics

Stars: Formation

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.

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Title: The SEDIGISM survey: Molecular clouds in the inner Galaxy
Creators: A Duarte-Cabral (Author) - Korea Astronomy and Space Science Institute, South Korea
D Colombo (Author) - Korea Astronomy and Space Science Institute, South Korea
J. S Urquhart (Author) - Korea Astronomy and Space Science Institute, South Korea
A Ginsburg (Author) - University of Florida, United States
D Russeil (Author) - Korea Astronomy and Space Science Institute, South Korea
F Schuller (Author) - Max Planck Society for the Advancement of Science (MPG), Germany
Lynn Anderson (Author) - Korea Astronomy and Space Science Institute, South Korea
P Barnes (Author) - Space Science Institute, United States
M Beltran (Author) - Korea Astronomy and Space Science Institute, South Korea
H Beuther (Author) - Korea Astronomy and Space Science Institute, South Korea
S Bontemps (Author) - University of Bordeaux, France
L Bronfman (Author) - University of Chile (UCH), Chile
T Csengeri (Author) - Korea Astronomy and Space Science Institute, South Korea
C L Dobbs (Author) - Korea Astronomy and Space Science Institute, South Korea
D Eden (Author) - Liverpool John Moores University, United Kingdom
A Giannetti (Author) - Korea Astronomy and Space Science Institute, South Korea
J Kauffmann (Author) - Korea Astronomy and Space Science Institute, South Korea
M Mattern (Author) - Max Planck Society for the Advancement of Science (MPG), Germany
S-N X Medina (Author) - Max Planck Society for the Advancement of Science (MPG), Germany
Karl M Menten (Author) - Max Planck Society for the Advancement of Science (MPG), Germany
M. Y Lee (Author) - Korea Astronomy and Space Science Institute, South Korea
Alexander R. Pettitt (Author)
M Riener (Author) - Max Planck Society for the Advancement of Science (MPG), Germany
A Rigby (Author) - Cardiff University, United Kingdom
A Traficante (Author) - Korea Astronomy and Space Science Institute, South Korea
V. S Veena (Author) - Korea Astronomy and Space Science Institute, South Korea
M Wienen (Author) - Korea Astronomy and Space Science Institute, South Korea
F Wyrowski (Author) - Max Planck Society for the Advancement of Science (MPG), Germany
C Agurto (Author) - European Southern Observatory Santiago, Chile
F Azagra (Author) - European Southern Observatory Santiago, Chile
R Cesaroni (Author) - Korea Astronomy and Space Science Institute, South Korea
R Finger (Author) - Korea Astronomy and Space Science Institute, South Korea
Enid T Gonzalez-Orta (Author) - Korea Astronomy and Space Science Institute, South Korea
T Henning (Author) - Max Planck Society for the Advancement of Science (MPG), Germany
A. K Hernandez (Author) - Korea Astronomy and Space Science Institute, South Korea
Jouni Kainulainen (Author) - Chalmers University of Technology
S Leurini (Author) - Korea Astronomy and Space Science Institute, South Korea
S Lopez (Author) - Korea Astronomy and Space Science Institute, South Korea
F Mac-Auliffe (Author) - European Southern Observatory Santiago, Chile
P Mazumdar (Author) - Korea Astronomy and Space Science Institute, South Korea
S Molinari (Author) - Korea Astronomy and Space Science Institute, South Korea
F Motte (Author) - Université Grenoble Alpes, France
E Muller (Author) - Macquarie University, Australia
Q Nguyen-Luong (Author) - Massachusetts Institute of Technology (MIT), USA
Rodrigo Parra Barraza (Author) - Korea Astronomy and Space Science Institute, South Korea
J-P Perez-Beaupuits (Author) - Korea Astronomy and Space Science Institute, South Korea
F. M Montenegro-Montes (Author) - Korea Astronomy and Space Science Institute, South Korea
T. J.T Moore (Author) - Korea Astronomy and Space Science Institute, South Korea
S Ragan (Author) - Cardiff University, United Kingdom
A Sanchez-Monge (Author) - Korea Astronomy and Space Science Institute, South Korea
A Sanna (Author) - Max Planck Society for the Advancement of Science (MPG), Germany
P Schilke (Author) - Korea Astronomy and Space Science Institute, South Korea
E Schisano (Author) - Istituto nazionale di astrofisica (INAF), Italy
N Schneider (Author) - University of Cologne, Germany
S Suri (Author) - Korea Astronomy and Space Science Institute, South Korea
L Testi (Author) - University of Cologne, Germany
K Torstensson (Author) - Korea Astronomy and Space Science Institute, South Korea
P Venegas (Author) - Korea Astronomy and Space Science Institute, South Korea
K Wang (Author) - Beijing University of Technology, China
A Zavagno (Author) - Laboratoire d'Astrophysique de Marseille, France
Academic Unit: Physics and Astronomy Department
Publication Details: 09/11/2020
Identifiers: 99257904214801671; https://hdl.handle.net/20.500.12741/rep:8607; https://doi.org/10.1093/mnras/staa2480
Language: English

The SEDIGISM survey: Molecular clouds in the inner Galaxy

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