Can I read Mapping the kinematic parameters of the Galaxy from the Gaia EDR3 red giants and sub-giants on EtoBox?

Mapping the kinematic parameters of the Galaxy from the Gaia EDR3 red giants and sub-giants by Fedorov, P. N.; Akhmetov, V. S.; Velichko, A. B.; Dmytrenko, A. M.; Denyshchenko, S. I. is a scholarly article available to read on EtoBox.

What is Mapping the kinematic parameters of the Galaxy from the Gaia EDR3 red giants and sub-giants about?

We present the results of a kinematic analysis of red giants and subgiants whose centroids are in the plane of our Galaxy. For this, the positions, parallaxes, proper motions, and radial velocities of these stars from the $Gaia$ EDR3 catalog were used. We applied two approaches to obtain kinematic parameters. The first approach -- solving the equations of the Ogorodnikov--Milne model with respect to 12 kinematic parameters -- is generally accepted, but has a number of disadvantages. The second approach developed by us is to find the components of galactocentric centroid's velocity and their partial derivatives with respect to coordinates directly from differential equations for the stellar velocity field. To calculate the kinematic parameters by the methods mentioned above, same stellar samples were used. From these samples spherical regions with a radius of 1 kpc were selected, the centers of which were located strictly in the Galactic mid-plane at the nodes of the coordinate grid ($x_{gal}$, $y_{gal}$) of a rectangular Galactocentric coordinate system with step 100 pc. The region of the Galaxy under study occupies the coordinate interval $115^\circ < \theta < 245^\circ$, 0 kpc$ <

Author

Fedorov, P. N.; Akhmetov, V. S.; Velichko, A. B.; Dmytrenko, A. M.; Denyshchenko, S. I.

Published

2022

Language

EN