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Related papers: Kinematics of pre-main sequence stars from the Gai…

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We have studied the kinematic properties of young pre-main-sequence stars. We have selected these stars based on data from the Gaia DR2 catalogue by invoking a number of photometric infrared surveys. Using 4564 stars with parallax errors…

Astrophysics of Galaxies · Physics 2020-11-03 V. V. Bobylev , A. T. Bajkova

We have selected a sample of 326 young $(\log t<8)$ open star clusters with the proper motions and distances calculated by various authors from Gaia DR2 data. The mean values of their line-of-sight velocities have also been taken from…

Astrophysics of Galaxies · Physics 2019-03-25 V. V. Bobylev , A. T. Bajkova

We have analyzed the kinematics of OB2 stars with proper motions and parallaxes selected by Xu et al. from the Gaia EDR3 catalog. The relative parallax errors for all the stars in this sample do not exceed 10\%. Based on a sample of 9750…

Astrophysics of Galaxies · Physics 2022-03-30 V. V. Bobylev , A. T. Bajkova

The sample of classic Cepheids with known distances and line-of-sight velocities is supplemented by the proper motions from the Gaia DR1 catalog. From spatial velocities of 260 stars the components of the peculiar Solar velocity:…

Astrophysics of Galaxies · Physics 2023-05-31 V. V. Bobylev

We have analyzed the kinematics of open star clusters (OSCs) with the proper motions and distances calculated by Hao et al. based on Gaia EDR3 data. The mean line-of-sight velocities are known for a number of clusters from this list. We…

Astrophysics of Galaxies · Physics 2022-03-25 V. V. Bobylev , A. T. Bajkova

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…

Astrophysics of Galaxies · Physics 2020-08-26 O. I. Krisanova , V. V. Bobylev , A. T. Bajkova

The spatial and kinematic properties of a large sample of young T Tauri stars from the solar neighborhood 500 pc in radius have been studied. The following parameters of the position ellipsoid have been determined from the most probable…

Astrophysics of Galaxies · Physics 2020-04-17 V. V. Bobylev

We have selected and analyzed a sample of OB stars with known line-of-sight velocities determined through ground-based observations and with trigonometric parallaxes and proper motions from the Gaia DR2 catalogue. Some of the stars in our…

Astrophysics of Galaxies · Physics 2018-09-28 V. V. Bobylev , A. T. Bajkova

We consider two previously studied samples of OB stars with different distance scales. The first one consists of 98 massive spectroscopic binary stars with photometric distances, and the second one consists on 140 OB stars with the…

Astrophysics of Galaxies · Physics 2017-03-22 V. V. Bobylev , A. T. Bajkova

Based on published sources, we have created a kinematic database on 220 massive (>10 solar masses) young Galactic star systems located within <3 kpc of the Sun. Out of them, approximately 100 objects are spectroscopic binary and multiple…

Astrophysics of Galaxies · Physics 2013-07-08 V. V. Bobylev , A. T. Bajkova

The kinematics of about 2000 classical Cepheids of the Milky Way with data from Gaia\,EDR3 catalog has been studied. For some of these stars, there are line-of-sight velocities. On the basis of the nonlinear rotation model, the parameters…

Astrophysics of Galaxies · Physics 2023-04-05 V. V. Bobylev , A. T. Bajkova

We have studied a sample containing about 6000 OB stars with proper motions and trigonometric parallaxes from the Gaia DR2 catalogue. The following parameters of the angular velocity of Galactic rotation have been found:…

Astrophysics of Galaxies · Physics 2019-06-26 V. V. Bobylev , A. T. Bajkova

The young star velocity field is analysed by means of a galactic model which takes into account solar motion, differential galactic rotation and spiral arm kinematics. We use two samples of Hipparcos data, one containing O- and B-type stars…

Astrophysics · Physics 2009-11-06 D. Fernandez , F. Figueras , J. Torra

Open star clusters from the MWSC (Milky Way Star Clusters) catalogue have been used to determine the Galactic rotation parameters. The circular rotation velocity of the solar neighborhood around the Galactic center has been found from data…

Astrophysics of Galaxies · Physics 2016-09-30 V. V. Bobylev , A. T. Bajkova , K. S. Shirokova

We have studied the kinematic properties of the candidates for hot subdwarfs (HSDs) selected by Geier et al. from the Gaia DR2 catalogue. We have used a total of 12 515 stars with relative trigonometric parallax errors less than 30\%. The…

Astrophysics of Galaxies · Physics 2019-10-03 V. V. Bobylev , A. T. Bajkova

To construct the rotation curve of the Galaxy, classical Cepheids with proper motions, parallaxes and line-of-sight velocities from the Gaia DR2 Catalog are used in large part. The working sample formed from literature data contains about…

Astrophysics of Galaxies · Physics 2021-03-02 V. V. Bobylev , A. T. Bajkova , A. S. Rastorguev , M. V. Zabolotskikh

This work presents the results of a kinematic analysis of the Galaxy that uses a new model as applied to the newest available Gaia data. We carry out the Taylor decomposition of the velocity field up to second order for 18 million high…

Astrophysics of Galaxies · Physics 2024-03-29 V. S. Akhmetov , B. Bucciarelli , M. Crosta , M. G. Lattanzi , A. Spagna , P. Re Fiorentin , E. Yu. Bannikova

The aim of the analysis of data from the Gaia Space Observatory is to obtain kinematic parameters of the collective motion of stars in a part of our galaxy. This research is based on a statistical analysis of the motion of {$55,038,539$}…

Astrophysics of Galaxies · Physics 2025-02-18 Petr Zavada , Karel Píška

Gaia DR2 has delivered full-sky 6-D measurements for millions of stars, and the quest to understand the dynamics of our Galaxy has entered a new phase. Our aim is to reveal and characterize the kinematic sub-structure of the different…

Astrophysics of Galaxies · Physics 2018-11-14 P. Ramos , T. Antoja , F. Figueras

The spatial velocities of the stars with high-precision positions, proper motions and parallaxes from the Gaia TGAS catalog and line-of-sight velocities from the RAVE5 catalog are considered. From the sample of 92395 stars with the age…

Astrophysics of Galaxies · Physics 2017-12-20 V. V. Vityazev , A. S. Tsvetkov , V. V. Bobylev , A. T. Bajkova
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