The distances of 61 PGCCs in the Second Galactic Quadrant
| Autor: | Xiang-Kun Liu, X. Y. Li, W. X. Sun, Bingqiu Chen, H. L. Guo, G. X. Li, Yujin Yang, Yang Huang |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Physics
010308 nuclear & particles physics Extinction (astronomy) Galactic quadrant FOS: Physical sciences Astronomy and Astrophysics Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences Astrophysics - Astrophysics of Galaxies Virial theorem symbols.namesake Stars Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) 0103 physical sciences symbols Astrophysics::Solar and Stellar Astrophysics Planck 010303 astronomy & astrophysics Solar and Stellar Astrophysics (astro-ph.SR) Astrophysics::Galaxy Astrophysics |
| Popis: | Determining the distances to the Planck Galactic cold clumps (PGCCs) is crucial for the measurement of their physical parameters and the study of their Galactic distribution. Based on two large catalogues of stars with robust distances and reddening estimates from the literature, we have estimated accurate distances to 61 PGCCs in the second Galactic quadrant. For this purpose, we have selected stars along the sightlines overlapping with the cores of the sample clumps and fitted the reddening profiles with a simple reddening model. The typical uncertainties of the resultant distances of these PGCCs are less than 8 per cent. The new estimates differ significantly from the kinematic values, well known to suffer from large errors. With the new distances, we have updated the physical properties including the radii, masses and virial parameters of the cores of the PGCCs. 9 pages, 5 figures, accepted for publication in MNRAS |
| Databáze: | OpenAIRE |
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