The Hi-GAL compact source catalogue - II. The 360° catalogue of clump physical properties
Artikel i vetenskaplig tidskrift, 2021

We present the 360° catalogue of physical properties of Hi-GAL compact sources, detected between 70 and 500 $\mu$m. This release not only completes the analogous catalogue previously produced by the Hi-GAL collaboration for -71° 2 á 2 67°, but also meaningfully improves it because of a new set of heliocentric distances, 120 808 in total. About a third of the 150 223 entries are located in the newly added portion of the Galactic plane. A first classification based on detection at 70 $\mu$m as a signature of ongoing star-forming activity distinguishes between protostellar sources (23 per cent of the total) and starless sources, with the latter further classified as gravitationally bound (pre-stellar) or unbound. The integral of the spectral energy distribution, including ancillary photometry from λ = 21 to 1100 $\mu$m, gives the source luminosity and other bolometric quantities, while a modified blackbody fitted to data for $\lambda \ge 160∼\mu$m yields mass and temperature. All tabulated clump properties are then derived using photometry and heliocentric distance, where possible. Statistics of these quantities are discussed with respect to both source Galactic location and evolutionary stage. No strong differences in the distributions of evolutionary indicators are found between the inner and outer Galaxy. However, masses and densities in the inner Galaxy are on average significantly larger, resulting in a higher number of clumps that are candidates to host massive star formation. Median behaviour of distance-independent parameters tracing source evolutionary status is examined as a function of the Galactocentric radius, showing no clear evidence of correlation with spiral arm positions.

Stars: formation

dust, extinction

ISM: clouds

local interstellar matter

infrared: ISM

submillimeter: ISM


Davide Elia

Istituto nazionale di astrofisica (INAF)

M. Merello

Universidad de Chile (UCH)

S. Molinari

Istituto nazionale di astrofisica (INAF)

E. Schisano

Istituto nazionale di astrofisica (INAF)

A. Zavagno

Institut Universitaire de France

Laboratoire d'Astrophysique de Marseille

D. Russeil

Laboratoire d'Astrophysique de Marseille

P. Mège

Laboratoire d'Astrophysique de Marseille

P. G. Martin

Institut canadien d'astrophysique théorique

L. Olmi

Osservatorio Astrofisico di Arcetri

Michele Pestalozzi

Istituto nazionale di astrofisica (INAF)

R. Plume

University of Calgary

S. E. Ragan

Cardiff University

M. Benedettini

Istituto nazionale di astrofisica (INAF)

D. J. Eden

Liverpool John Moores University

T. J.T. Moore

Istituto nazionale di astrofisica (INAF)

A. Noriega-Crespo

Space Telescope Science Institute (STScI)

R. Paladini

California Institute of Technology (Caltech)

P. Palmeirim

Universidade do Porto

Stefano Pezzuto

Istituto nazionale di astrofisica (INAF)

G.L. Pilbratt

European Space Research and Technology Centre (ESA ESTEC)

Kazi L.J. Rygl

Istituto nazionale di astrofisica (INAF)

P. Schilke

Universität zu Köln

F. Strafella

Universita del Salento

Istituto nazionale di astrofisica (INAF)

Jonathan Tan

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

University of Virginia

A. Traficante

Istituto nazionale di astrofisica (INAF)

A. Baldeschi

Northwestern University

J. Bally

University of Colorado at Boulder

A. M.D. Giorgio

Istituto nazionale di astrofisica (INAF)

E. Fiorellino

Magyar Tudomanyos Akademia

Sapienza, Università di Roma

Osservatorio Astronomico di Roma

S. J. Liu

Istituto nazionale di astrofisica (INAF)

L. Piazzo

Sapienza, Università di Roma

D. Polychroni

Istituto nazionale di astrofisica (INAF)

Monthly Notices of the Royal Astronomical Society

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

Vol. 504 2 2742-2766


Subatomär fysik

Astronomi, astrofysik och kosmologi

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