The SEDIGISM survey: First Data Release and overview of the Galactic structure
Artikel i vetenskaplig tidskrift, 2021

The SEDIGISM (Structure, Excitation and Dynamics of the Inner Galactic InterstellarMedium) survey used the APEX telescope to map 84 deg(2) of the Galactic plane between l = -60 degrees and +31 degrees in several molecular transitions, including (CO)-C-13(2 - 1) and (CO)-O-18(2 - 1), thus probing the moderately dense (similar to 10(3) cm(-3)) component of the interstellar medium. With an angular resolution of 30 arcsec and a typical 1 sigma sensitivity of 0.8-1.0K at 0.25 km s(-1) velocity resolution, it gives access to a wide range of structures, from individual star-forming clumps to giant molecular clouds and complexes. The coverage includes a good fraction of the first and fourth Galactic quadrants, allowing us to constrain the large-scale distribution of cold molecular gas in the inner Galaxy. In this paper, we provide an updated overview of the full survey and the data reduction procedures used. We also assess the quality of these data and describe the data products that are being made publicly available as part of this First Data Release (DR1). We present integrated maps and position-velocity maps of the molecular gas and use these to investigate the correlation between the molecular gas and the large-scale structural features of the Milky Way such as the spiral arms, Galactic bar and Galactic Centre. We find that approximately 60 per cent of the molecular gas is associated with the spiral arms and these appear as strong intensity peaks in the derived Galactocentric distribution. We also find strong peaks in intensity at specific longitudes that correspond to the Galactic Centre and well-known star-forming complexes, revealing that the 13CO emission is concentrated in a small number of complexes rather than evenly distributed along spiral arms.

Galaxy: kinematics and dynamics

surveys

ISM: structure

radio lines: ISM

Författare

F. Schuller

European Southern Observatory Santiago

Max-Planck-Gesellschaft

Leibniz-Institut Für Astrophysik Potsdam

J. S. Urquhart

University Of Kent

T. Csengeri

Université de Bordeaux

Max-Planck-Gesellschaft

D. Colombo

Max-Planck-Gesellschaft

A. Duarte-Cabral

Cardiff University

M. Mattern

Max-Planck-Gesellschaft

A. Ginsburg

University of Florida

A. R. Pettitt

Hokkaido University

F. Wyrowski

Max-Planck-Gesellschaft

L. Anderson

West Virginia University

F. Azagra

European Southern Observatory Santiago

P. Barnes

Space Science Institute

M. Beltran

Osservatorio Astrofisico di Arcetri

H. Beuther

Max-Planck-Gesellschaft

S. Billington

University Of Kent

L. Bronfman

Universidad de Chile (UCH)

R. Cesaroni

Osservatorio Astrofisico di Arcetri

C. Dobbs

University of Exeter

D. Eden

Liverpool John Moores University

M-Y Lee

Korea Astronomy and Space Science Institute

S-N X. Medina

Max-Planck-Gesellschaft

K. M. Menten

Max-Planck-Gesellschaft

T. Moore

Liverpool John Moores University

F. M. Montenegro-Montes

European Southern Observatory Santiago

S. Ragan

Cardiff University

A. Rigby

Cardiff University

M. Riener

Max-Planck-Gesellschaft

D. Russeil

Aix-Marseille Université

E. Schisano

Istituto nazionale di astrofisica (INAF)

A. Sanchez-Monge

Universität zu Köln

A. Traficante

Istituto nazionale di astrofisica (INAF)

A. Zavagno

Aix-Marseille Université

C. Agurto

European Southern Observatory Santiago

S. Bontemps

Université de Bordeaux

R. Finger

Universidad de Chile (UCH)

A. Giannetti

Istituto nazionale di astrofisica (INAF)

E. Gonzalez

European Southern Observatory Santiago

A. K. Hernandez

University of Wisconsin Madison

T. Henning

Max-Planck-Gesellschaft

Jouni Kainulainen

Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik, Galaktisk astrofysik

J. Kauffmann

Massachusetts Institute of Technology (MIT)

S. Leurini

INAF Osservatorio Astronomico di Cagliari

S. Lopez

University of Florida

F. Mac-Auliffe

European Southern Observatory Santiago

P. Mazumdar

Max-Planck-Gesellschaft

S. Molinari

Istituto nazionale di astrofisica (INAF)

F. Motte

Université Grenoble Alpes

E. Muller

Macquarie University

Q. Nguyen-Luong

McMaster University

R. Parra

European Southern Observatory Santiago

J-P Perez-Beaupuits

European Southern Observatory Santiago

P. Schilke

Universität zu Köln

N. Schneider

Universität zu Köln

S. Suri

Universität zu Köln

L. Testi

European Southern Observatory Santiago

K. Torstensson

European Southern Observatory Santiago

V. S. Veena

Universität zu Köln

P. Venegas

European Southern Observatory Santiago

K. Wang

Beijing University of Technology

M. Wienen

University of Exeter

Max-Planck-Gesellschaft

Monthly Notices of the Royal Astronomical Society

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

Vol. 500 3 3064-3082

Ämneskategorier

Astronomi, astrofysik och kosmologi

Annan kemi

Geofysik

DOI

10.1093/mnras/staa2369

Mer information

Senast uppdaterat

2021-02-08