Abstract
We have studied a sample of more than 25 000 young stars with proper motions and trigonometric parallaxes from the Gaia DR2 catalogue. The relative errors of their parallaxes do not exceed 10\(\%\). The selection of stars belonging to active star-forming regions was made by Marton et al. based on data from the Gaia DR2 catalogue by invoking infrared measurements from the WISE and Planck catalogues. Low-mass T Tauri stars constitute the majority of sample stars. The following parameters of the angular velocity of Galactic rotation have been found from them: \(\Omega_{0}=28.40\pm 0.11\) km s\({}^{-1}\) kpc\({}^{-1}\), \(\Omega^{\prime}_{0}=-3.933\pm 0.033\) km s\({}^{-1}\) kpc\({}^{-2}\), and \(\Omega^{\prime\prime}_{0}=0.804\pm 0.040\) km s\({}^{-1}\) kpc\({}^{-3}\). The Oort constants are \(A=15.73\pm 0.32\) km s\({}^{-1}\) kpc\({}^{-1}\) and \(B=-12.67\pm 0.34\) km s\({}^{-1}\) kpc\({}^{-1}\), while the circular rotation velocity of the solar neighborhood around the Galactic center is \(V_{0}=227\pm 4\) km s\({}^{-1}\) for the adopted Galactocentric distance of the Sun \(R_{0}=8.0\pm 0.15\) kpc.
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ACKNOWLEDGMENTS
We are grateful to the referee for the useful remarks that contributed to an improvement of the paper.
Funding
This work was supported in part by Program KP19–270 of the Presidium of the Russian Academy of Sciences ‘‘Questions of the Origin and Evolution of the Universe with the Application of Methods of Ground-Based Observations and Space Research.’’
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Krisanova, O.I., Bobylev, V.V. & Bajkova, A.T. Galactic Rotation Parameters Based on Stars from Active Star-Forming Regions with Data from the Gaia DR2 Catalogue. Astron. Lett. 46, 370–378 (2020). https://doi.org/10.1134/S1063773720060067
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DOI: https://doi.org/10.1134/S1063773720060067