| Issue |
A&A
Volume 646, February 2021
|
|
|---|---|---|
| Article Number | A74 | |
| Number of page(s) | 15 | |
| Section | Catalogs and data | |
| DOI | https://doi.org/10.1051/0004-6361/202038956 | |
| Published online | 17 February 2021 | |
Distance of Hi-GAL sources⋆,⋆⋆
1
Aix Marseille Univ., CNRS, CNES, LAM, Marseille, France
e-mail: delphine.russeil@lam.fr
2
Institut Universitaire de France, Paris, France
3
INAF – Istituto di Astrofisica e Planetologia Spaziali (INAF-IAPS), Via del Fosso del Cavaliere n. 100, 00133 Rome, Italy
4
Department of Physics and Astronomy University of Exeter, Exeter, UK
5
INAF – Osservatorio Astronomico di Trieste, Trieste, Italy
6
Observatoire Astronomique de Strasbourg, Université de Strasbourg, CNRS UMR 7550, 11 rue de l’université, 67000 Strasbourg, France
7
Department of Physics, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
8
Department of Physics and Astronomy, West Virginia University, Morgantown, WV 26506, USA
9
Departamento de Astronomía, Universidad de Chile, Casilla 36-D, Santiago, Chile
10
Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, 14482 Potsdam, Germany
11
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
Received:
16
July
2020
Accepted:
28
November
2020
Aims. Distances are key to determining the physical properties of sources. In the Galaxy, large (> 10 000) homogeneous samples of sources for which distance are available, covering the whole Galactic distance range, are still missing. Here we present a catalog of velocity and distance for a large sample (> 100 000) of Hi-GAL compact sources.
Methods. We developed a fully automatic Python package to extract the velocity and determine the distance. To assign a velocity to a Hi-GAL compact source, the code uses all the available spectroscopic data complemented by a morphological analysis. Once the velocity is determined, if no stellar or maser parallax distance is known, the kinematic distance is calculated and the distance ambiguity (for sources located inside the Solar circle) is solved with the H I self-absorption method or from distance–extinction data.
Results. Among the 150 223 compact sources of the Hi-GAL catalog, we obtained a distance for 124 069 sources for the 5σ catalog (and 128 351 sources for the 3σ catalog), where σ represents the noise level of each molecular spectrum used for the line detections made at 5σ and 3σ to produce the respective catalogs.
Key words: stars: distances / catalogs
Hi-GAL (Herschel infrared Galactic plane Survey) is a Herschel key project. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.
Full Table 3 and Table E.1 are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/cat/J/A+A/646/A74
© P. Mège et al. 2021
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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