Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Bobylev, Vadim V."'
Autor:
Bobylev, Vadim V., Bajkova, Anisa T.
Publikováno v:
Astronomy Reports (2024) Vol. 68, No. 9, pp. 878-885
The kinematic properties of the Sco-Cen association have been studied using the spatial velocities of young stars. New kinematic age estimates for the three components of the association with the age of UCL and LCC being $17.7\pm2.4$ Myrs and the age
Externí odkaz:
http://arxiv.org/abs/2410.21156
Autor:
Bobylev, Vadim V., Bajkova, Anisa T.
Publikováno v:
Astrophysical Bulletin, 2024, Vol. 79, No. 3, pp. 473-480
The kinematics of the young stellar association near the Sun TW Hya is studied. Kinematic estimates of the age of this association were obtained in two ways. The first method -- analysis of stellar trajectories integrated back in time -- gave an esti
Externí odkaz:
http://arxiv.org/abs/2407.18132
Autor:
Bobylev, Vadim V., Bajkova, Anisa T.
Publikováno v:
Astronomy Reports, 2024, Vol. 68, No. 3, pp. 247-256
The kinematics of the $\epsilon$ Cha young stellar association close to the Sun has been studied based on a list of candidate stars from the Dickson-Vandervelde work. The working sample consists of 26 stars with parallaxes, proper motions from the Ga
Externí odkaz:
http://arxiv.org/abs/2406.00461
Autor:
Bobylev, Vadim V., Bajkova, Anisa T.
The trajectories of the clusters $\eta$ Cha, $\epsilon$ Cha and Cha I, Cha II, constructed backward in time, have been studied. We concluded that the hypothesis about the joint formation of all four of these clusters from one molecular cloud cannot b
Externí odkaz:
http://arxiv.org/abs/2404.00669
Autor:
Bobylev, Vadim V., Bajkova, Anisa T.
A spectral analysis of the vertical positions and velocities of 374 open star clusters (OSCs) was carried out. We took these OSCs from the Hunt, Reffert catalog; they have an average age of about 10 million years, and are located on the galactic plan
Externí odkaz:
http://arxiv.org/abs/2401.02144
Autor:
Bobylev, Vadim V.
Publikováno v:
Astronomy Letters, 2023, Vol. 49, No. 9, pp. 493-500
Based on Cepheids located near the solar circle, we have determined the Galactocentric distance of the Sun $R_0$ and the Galactic rotation velocity at the solar distance $V_0$. For our analysis we used a sample of $\sim$200 classical Cepheids from th
Externí odkaz:
http://arxiv.org/abs/2312.05500
Autor:
Bobylev, Vadim V., Bajkova, Anisa T.
Publikováno v:
Astronomy Letters, 2023, Vol. 49, No. 7, pp. 410-420
We have studied the kinematics of a unique sample of young open star clusters (OSCs) with high vertical velocities, $15
Externí odkaz:
http://arxiv.org/abs/2310.19709
Studies of the dynamics of globular clusters assume different values of bar parameters (mass, velocity, size) and analyse the results of orbit classifications over the range of the chosen values. It is also a usual thing that a spherical bulge compon
Externí odkaz:
http://arxiv.org/abs/2310.18172
Autor:
Bobylev, Vadim V., Bajkova, Anisa T.
Publikováno v:
Astronomy Letters, 2023, Vol. 49, No. 6, pp. 320-330
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 distanc
Externí odkaz:
http://arxiv.org/abs/2309.12097
Autor:
Bobylev, Vadim V., Bajkova, Anisa T.
Publikováno v:
Astronomy Letters, 2023, Vol. 49, pp. 184-192
We invoke the estimates of the amplitudes of the velocity perturbations $f_R$ and $f_\theta$ caused by the influence of a spiral density wave that have been obtained by us previously from three stellar samples. These include Galactic masers with meas
Externí odkaz:
http://arxiv.org/abs/2306.08443