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.
radio lines: ISM
ISM: structure
Galaxy: kinematics and dynamics
surveys
Författare
F. Schuller
Max-Planck-Gesellschaft
European Southern Observatory Santiago
Leibniz-Institut Für Astrophysik Potsdam
J. S. Urquhart
University Of Kent
T. Csengeri
Max-Planck-Gesellschaft
Université de Bordeaux
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
J. Kauffmann
Massachusetts Institute of Technology (MIT)
S. Leurini
Istituto nazionale di astrofisica (INAF)
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 3064-3082Ämneskategorier
Astronomi, astrofysik och kosmologi
Annan kemi
Geofysik
DOI
10.1093/mnras/staa2369