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- W4386977812 abstract "We have estimated the spiral pattern speed in the Galaxy $Omega_p$ from a large sample of young open star clusters (OSCs). For this purpose, we have used 2494 OSCs younger than 50 Myr. Their mean proper motions, line-of-sight velocities, and distances were calculated by Hunt and Reffert (2023) based on data from the Gaia~DR3 catalogue. Three methods have been applied to estimate $Omega_p$. They all are based on the linear Lin-Shu spiral density wave theory. We have obtained an estimate of $Omega_p=24.26pm0.52$~km s$^{-1}$ kpc$^{-1}$ by the first method, which is most reliable in our view, using the velocity perturbations $f_R$ and $f_theta$ found through a spectral analysis of the radial, $V_R$, and residual rotation, $Delta V_{rm circ},$ velocities. Using the second method, we have found the velocity perturbations $f_R$ and $f_theta$ by solving the basic kinematic equations together with the Galactic rotation parameters and obtained an estimate of $Omega_p= 23.45pm0.53$~km s$^{-1}$ kpc$^{-1}$. We have found $Omega_p= 28.9pm2.8$~km s$^{-1}$ kpc$^{-1}$ by the third method based on an analysis of the position angles of OSCs at their birth time $theta_{rm birth}$." @default.
- W4386977812 created "2023-09-23" @default.
- W4386977812 creator A5004929263 @default.
- W4386977812 date "2023-09-21" @default.
- W4386977812 modified "2023-09-24" @default.
- W4386977812 title "Determination of the Spiral Pattern Speed in the Milky Way from Young Open Star Clusters" @default.
- W4386977812 doi "https://doi.org/10.1134/s1063773723060014" @default.
- W4386977812 hasPublicationYear "2023" @default.
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