| Title | The SEDIGISM survey: First Data Release and overview of the Galactic structure |
| Authors | Schuller, F. Urquhart, J. S. Csengeri, T. Colombo, D. Duarte-Cabral, A. Mattern, M. Ginsburg, A. Pettitt, A. R. Wyrowski, F. Anderson, L. Azagra, F. Barnes, P. Beltran, M. Beuther, H. Billington, S. Bronfman, L. Cesaroni, R. Dobbs, C. Eden, D. Lee, M-Y Medina, S-N X. Menten, K. M. Moore, T. Montenegro-Montes, F. M. Ragan, S. Rigby, A. Riener, M. Russeil, D. Schisano, E. Sanchez-Monge, A. Traficante, A. Zavagno, A. Agurto, C. Bontemps, S. Finger, R. Giannetti, A. Gonzalez, E. Hernandez, A. K. Henning, T. Kainulainen, J. Kauffmann, J. Leurini, S. Lopez, S. Mac-Auliffe, F. Mazumdar, P. Molinari, S. Motte, F. Muller, E. Nguyen-Luong, Q. Parra, R. Perez-Beaupuits, J-P Schilke, P. Schneider, N. Suri, S. Testi, L. Torstensson, K. Veena, V. S. Venegas, P. Wang, K. Wienen, M. |
| Affiliation | Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany European Southern Observ, Alonso de Cordova 3107, Santiago, Chile Leibniz Inst Astrophys Potsdam AIP, Sternwarte 16, D-14482 Potsdam, Germany Univ Kent, Ctr Astrophys & Planetary Sci, Canterbury CT2 7NH, New Zealand Univ Bordeaux, Lab Astrophys Bordeaux, CNRS, B18N,Geoffroy St Hilaire, F-33615 Pessac, France Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3AA, Wales Univ Florida, Dept Astron, POB 112055, Gainesville, FL 32611 USA Hokkaido Univ, Fac Sci, Dept Phys, Sapporo, Hokkaido 0600810, Japan West Virginia Univ, Dept Phys & Astron, POB 6315, Morgantown, WV 26506 USA Space Sci Inst, 4765 Walnut St Suite B, Boulder, CO 80301 USA Observ Astrofis Arcetri, Largo Enrico Fermi 5, I-50125 Florence, Italy Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany Univ Chile, Dept Astron, Casilla 36-D, Santiago, Chile Univ Exeter, Dept Phys & Astron, Stocker Rd, Exeter EX4 4QL, Devon, England Liverpool John Moores Univ, Astrophys Res Inst, 146 Brownlow Hill, Liverpool L3 5RF, Merseyside, England Korea Astron & Space Sci Inst, 776 Daedeok Daero, Daejeon 34055, South Korea Aix Marseille Univ, Lab Astrophys Marseille, CNRS, UMR 7326, F-13388 Marseille, France INAF, Ist Astrofis & Planetol Spaziali, Via Fosso Cavaliere 100, I-00133 Rome, Italy Univ Cologne, Phys Inst 1, Zulpicher Str 77, D-50937 Cologne, Germany INAF Ist Radioastron, Via Gobetti 101, I-40129 Bologna, Italy Univ Wisconsin, Astron Dept, 475 North Charter St, Madison, WI 53706 USA Chalmers Univ Technol, Dept Space Earth & Environm, Onsala Space Observ, SE-43992 Onsala, Sweden MIT, Haystack Observ, 99 Millstone Rd, Westford, MA 01886 USA INAF Osserv Astron Cagliari, Via Sci 5, I-09047 Selargius, CA, Italy Univ Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France Macquarie Univ, Sch Engn, Sydney, NSW 2109, Australia McMaster Univ, 1 James St N, Hamilton, ON L8P 1A2, Canada European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany Peking Univ, Kavli Inst Astron & Astrophys, 5 Yiheyuan Rd, Beijing 100871, Peoples R China |
| Keywords | RECONSTRUCTING CO MAPS H-II REGIONS MILKY-WAY STAR-FORMATION MOLECULAR CLOUDS CARBON-MONOXIDE INNER-GALAXY COMPLETE SAMPLE PATTERN SPEED SPIRAL ARMS |
| Issue Date | Jan-2021 |
| Publisher | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY |
| Abstract | 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. |
| URI | http://hdl.handle.net/20.500.11897/603199 |
| ISSN | 0035-8711 |
| DOI | 10.1093/mnras/staa2369 |
| Indexed | SCI(E) |
| Appears in Collections: | 科维理天文与天体物理研究所 |
