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The Hi-GAL compact source catalogue – I. The physical properties of the clumps in the inner Galaxy (−71∘.0 < ℓ < 67∘0)

Elia, Davide and Paladini, R. and Veneziani, M. (2017) The Hi-GAL compact source catalogue – I. The physical properties of the clumps in the inner Galaxy (−71∘.0 < ℓ < 67∘0). Monthly Notices of the Royal Astronomical Society, 471 (1). pp. 100-143. ISSN 0035-8711. doi:10.1093/mnras/stx1357.

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Hi-GAL (Herschel InfraRed Galactic Plane Survey) is a large-scale survey of the Galactic plane, performed with Herschel in five infrared continuum bands between 70 and 500 μm. We present a band-merged catalogue of spatially matched sources and their properties derived from fits to the spectral energy distributions (SEDs) and heliocentric distances, based on the photometric catalogues presented in Molinari et al., covering the portion of Galactic plane −71∘.0 < ℓ < 67∘.0. The band-merged catalogue contains 100 922 sources with a regular SED, 24 584 of which show a 70-μm counterpart and are thus considered protostellar, while the remainder are considered starless. Thanks to this huge number of sources, we are able to carry out a preliminary analysis of early stages of star formation, identifying the conditions that characterize different evolutionary phases on a statistically significant basis. We calculate surface densities to investigate the gravitational stability of clumps and their potential to form massive stars. We also explore evolutionary status metrics such as the dust temperature, luminosity and bolometric temperature, finding that these are higher in protostellar sources compared to pre-stellar ones. The surface density of sources follows an increasing trend as they evolve from pre-stellar to protostellar, but then it is found to decrease again in the majority of the most evolved clumps. Finally, we study the physical parameters of sources with respect to Galactic longitude and the association with spiral arms, finding only minor or no differences between the average evolutionary status of sources in the fourth and first Galactic quadrants, or between ‘on-arm’ and ‘interarm’ positions.

Item Type:Article
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URLURL TypeDescription Paper
Paladini, R.0000-0002-5158-243X
Alternate Title:Properties of Hi-GAL clumps in the inner Galaxy]{The Hi-GAL compact source catalogue. I. The physical properties of the clumps in the inner Galaxy (−71.0∘<ℓ<67.0∘)
Additional Information:© 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. Accepted 2017 May 31. Received 2017 May 25; in original form 2016 September 15. The authors thank the anonymous referee for her/his careful reading of the manuscript and insightful comments. This work is part of the VIALACTEA Project, a Collaborative Project under Framework Programme 7 of the European Union, funded under Contract #607380, which is hereby acknowledged. Herschel Hi-GAL data processing, map production and source catalogue generation is the result of a multi-year effort, which was initially funded, thanks to Contracts I/038/080/0 and I/029/12/0 from ASI (Agenzia Spaziale Italiana). Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA. PACS has been developed by a consortium of institutes led by MPE (Germany) and including UVIE (Austria); KUL, CSL, IMEC (Belgium); CEA, OAMP (France); MPIA (Germany); IAPS, OAP/OAT, OAA/CAISMI, LENS, SISSA (Italy); and IAC (Spain). This development has been supported by the funding agencies BMVIT (Austria), ESA-PRODEX (Belgium), CEA/CNES (France), DLR (Germany), ASI (Italy) and CICYT/MCYT (Spain). SPIRE has been developed by a consortium of institutes led by Cardiff University (UK) and including the University of Lethbridge (Canada); NAOC (China); CEA, LAM (France); IAPS, University of Padua (Italy); IAC (Spain); Stockholm Observatory (Sweden); Imperial College London, RAL, UCL-MSSL, UKATC, University of Sussex (UK); and Caltech, JPL, NHSC, University of Colorado (USA). This development has also been supported by national funding agencies: CSA (Canada); NAOC (China); CEA, CNES, CNRS (France); ASI (Italy); MCINN (Spain); Stockholm Observatory (Sweden); STFC (UK); and NASA (USA).
Funding AgencyGrant Number
European Research Council (ERC)607380
Agenzia Spaziale Italiana (ASI)I/038/080/0
Agenzia Spaziale Italiana (ASI)I/029/12/0
Bundesministerium für Verkehr, Innovation und Technologie (BMVIT)UNSPECIFIED
European Space Agency (ESA)UNSPECIFIED
Commissariat à l'Énergie Atomique (CEA)UNSPECIFIED
Centre National d'Études Spatiales (CNES)UNSPECIFIED
Deutsche Forschungsanstalt für Luft-Und Raumfahrt (DLR)UNSPECIFIED
Comisión Interministerial de Ciencia y Tecnología (CICYT)UNSPECIFIED
Ministerio de Ciencia Y Tecnologia (MCYT)UNSPECIFIED
Canadian Space Agency (CSA)UNSPECIFIED
National Astronomical Observatories, Chinese Academy of Sciences (NAOC)UNSPECIFIED
Centre National de la Recherche Scientifique (CNRS)UNSPECIFIED
Ministerio de Ciencia e Innovación (MCINN)UNSPECIFIED
Stockholm ObservatoryUNSPECIFIED
Science and Technology Facilities Council (STFC)UNSPECIFIED
Subject Keywords:catalogues, ISM: clouds, dust, extinction, local interstellar matter, infrared: ISM, submillimetre: ISM
Issue or Number:1
Record Number:CaltechAUTHORS:20170908-131138327
Persistent URL:
Official Citation:Davide Elia, S. Molinari, E. Schisano, M. Pestalozzi, S. Pezzuto, M. Merello, A. Noriega-Crespo, T. J. T. Moore, D. Russeil, J. C. Mottram, R. Paladini, F. Strafella, M. Benedettini, J. P. Bernard, A. Di Giorgio, D. J. Eden, Y. Fukui, R. Plume, J. Bally, P. G. Martin, S. E. Ragan, S. E. Jaffa, F. Motte, L. Olmi, N. Schneider, L. Testi, F. Wyrowski, A. Zavagno, L. Calzoletti, F. Faustini, P. Natoli, P. Palmeirim, F. Piacentini, L. Piazzo, G. L. Pilbratt, D. Polychroni, A. Baldeschi, M. T. Beltrán, N. Billot, L. Cambrésy, R. Cesaroni, P. García-Lario, M. G. Hoare, M. Huang, G. Joncas, S. J. Liu, B. M. T. Maiolo, K. A. Marsh, Y. Maruccia, P. Mège, N. Peretto, K. L. J. Rygl, P. Schilke, M. A. Thompson, A. Traficante, G. Umana, M. Veneziani, D. Ward-Thompson, A. P. Whitworth, H. Arab, M. Bandieramonte, U. Becciani, M. Brescia, C. Buemi, F. Bufano, R. Butora, S. Cavuoti, A. Costa, E. Fiorellino, A. Hajnal, T. Hayakawa, P. Kacsuk, P. Leto, G. Li Causi, N. Marchili, S. Martinavarro-Armengol, A. Mercurio, M. Molinaro, G. Riccio, H. Sano, E. Sciacca, K. Tachihara, K. Torii, C. Trigilio, F. Vitello, H. Yamamoto; The Hi-GAL compact source catalogue – I. The physical properties of the clumps in the inner Galaxy (−71∘.0 < ℓ < 67∘.0), Monthly Notices of the Royal Astronomical Society, Volume 471, Issue 1, 11 October 2017, Pages 100–143,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:81267
Deposited By: Ruth Sustaita
Deposited On:11 Sep 2017 22:39
Last Modified:15 Nov 2021 19:42

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