The SEDIGISM survey: molecular clouds in the inner Galaxy-Reference-Cited by-同舟云学术

The SEDIGISM survey: molecular clouds in the inner Galaxy

Published:2020-09-11 Issue:3 Volume:500 Page:3027-3049
ISSN:0035-8711
Container-title:Monthly Notices of the Royal Astronomical Society
language:en
Short-container-title:

Author:

Duarte-Cabral A¹^ORCID,Colombo D²,Urquhart J S³^ORCID,Ginsburg A⁴,Russeil D⁵,Schuller F²^ORCID,Anderson L D⁶,Barnes P J⁷⁸,Beltrán M T⁹,Beuther H¹⁰,Bontemps S¹¹,Bronfman L¹²,Csengeri T¹¹,Dobbs C L¹³,Eden D¹⁴^ORCID,Giannetti A²,Kauffmann J¹⁵,Mattern M²,Medina S-N X²,Menten K M²,Lee M-Y²¹⁶,Pettitt A R¹⁷^ORCID,Riener M¹⁰,Rigby A J¹^ORCID,Traficante A¹⁸^ORCID,Veena V S¹⁹,Wienen M²,Wyrowski F²,Agurto C²⁰,Azagra F²⁰,Cesaroni R⁹,Finger R¹²,Gonzalez E²⁰,Henning T¹⁰,Hernandez A K²¹,Kainulainen J²²²,Leurini S²²³,Lopez S⁴,Mac-Auliffe F²⁰,Mazumdar P²,Molinari S¹⁸^ORCID,Motte F²⁴,Muller E²⁵,Nguyen-Luong Q¹⁵,Parra R²⁰,Perez-Beaupuits J-P²⁰^ORCID,Montenegro-Montes F M²⁰,Moore T J T¹⁴,Ragan S E¹^ORCID,Sánchez-Monge A¹⁹,Sanna A²,Schilke P¹⁹,Schisano E¹⁸^ORCID,Schneider N¹⁹^ORCID,Suri S¹⁹,Testi L¹⁹,Torstensson K²⁰,Venegas P²⁰,Wang K²⁶,Zavagno A⁵

Affiliation:

1. School of Physics & Astronomy, Cardiff University, Queen’s building, The parade, Cardiff CF24 3AA, UK

2. Max-Planck-Institut für Radioastronomie (MPIfR), Auf dem Hügel 69, D-53121 Bonn, Germany

3. School of Physical Sciences, University of Kent, Ingram Building, Canterbury, Kent CT2 7NH, UK

4. Department of Astronomy, University of Florida, 211 Bryant Space Sciences Center, Gainesville, FL 32611-2055, USA

5. Laboratoire d’Astrophysique de Marseille, CNRS, Aix Marseille Université, UMR 7326, F-13388 Marseille, France

6. Department of Physics & Astronomy, West Virginia University, P. O. Box 6315, Morgantown, WV 26506, USA

7. Space Science Institute, 4765 Walnut St. Suite B, Boulder, CO 80301, USA

8. School of Science and Technology, University of New England, NSW 2351, Australia

9. Observatorio Astrofisico di Arcetri, Largo Enrico Fermi 5, I-50125 Firenze, Italy

10. Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany

11. Laboratoire d’astrophysique de Bordeaux, CNRS, Univ. Bordeaux, B18N, allée Geoffroy Saint-Hilaire, F-33615 Pessac, France

12. Departamento de Astronomía, Universidad de Chile, Casilla 36-D, Santiago, Chile

13. Department of Physics & Astronomy, University of Exeter, Stocker Road, Exeter EX4 4QL, UK

14. Astrophysics Research Institute, Liverpool John Moores University, 146 Brownlow Hill, Liverpool L3 5RF, UK

15. Haystack Observatory, Massachusetts Institute of Technology, 99 Millstone Road, Westford, MA 01886, USA

16. Korea Astronomy & Space Science Institute, 776 Daedeokdae-ro, 34055 Daejeon, Republic of Korea

17. Department of Physics, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan

18. Istituto di Astrofisica e Planetologia Spaziali, INAF, via Fosso del Cavaliere 100, I-00133 Roma, Italy

19. I. Physikalisches Institut, Universität zu Köln, Zülpicher Str 77, D-50937 Köln, Germany

20. European Southern Observatory, Alonso de Cordova 3107, Casilla 19001, Santiago 19, Chile

21. Astronomy Department, University of Wisconsin, 475 North Charter St, Madison, WI 53706, USA

22. Department of Space, Earth and Environment, Chalmers University of Technology Onsala Space Observatory, SE-439 92 Onsala, Sweden

23. INAF – Osservatorio Astronomico di Cagliari, Via della Scienza 5, I-09047 Selargius (CA), Italy

24. ipag, Univ. Grenoble Alpes, CNRS, F-38000 Grenoble, France

25. School of Engineering, Macquarie University, NSW 2109, Australia

26. Kavli Institute for Astronomy and Astrophysics, Peking University, 5 Yiheyuan Road, Haidian District, Beijing 100871, People’s Republic of China

Abstract

ABSTRACT 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.

Funder

Office of the Royal Society

Science and Technology Facilities Council

Deutsche Forschungsgemeinschaft

Comisión Nacional de Investigación Científica y Tecnológica

H2020 European Research Council

Horizon 2020 Framework Programme

Agence Nationale de la Recherche

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics