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Fehér, O.; Tóth, L. Viktor; Kraus, Alex; Bőgner, Rebeka; Kim, Gwanjeong; Liu, Tie; Tatematsu, Ken’ichi; Tóth, Victor; Eden, David J.; Hirano, Naomi; Juvela, Mika; Kim, Kee-Tae; Li, Di; Liu, Sheng-Yuan; Wu, Yuefang
The Astrophysical journal. Supplement series, 01/2022, Letnik: 258, Številka: 1Journal Article
Abstract The Planck Catalogue of Galactic Cold Clumps provides an all-sky sample of potential star-forming regions based on the submillimeter emission of their dust content. Around 1000 of these Planck objects were mapped with the James Clerk Maxwell telescope in the submillimeter range during the SCOPE survey, identifying prestellar and protostellar dense clumps inside them. We used the Effelsberg 100 m telescope to observe the emission lines of the NH 3 inversion transitions toward a sample of 97 dense objects in varying environments in order to assess the physical parameters of their gas content. We derive their temperature, density, and velocity dispersion, correlating the resulting parameters with the environmental and evolutionary characteristics of the targets and with regard to their distance and physical size. We examine the dependence of physical parameters on distance and Galactic position and compare the gas-based and dust-continuum-based temperatures and densities. Together with the presence of maser emission and higher inversion transitions of ammonia, we may differentiate between certain groups of targets, e.g., filamentary, protostellar clumps, and high-latitude, core-sized, starless sources.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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