Zobrazeno 1 - 10
of 148
pro vyhledávání: '"Dambis, A. K."'
We study the periodic enhancement of either trailing or leading segments of the resonance elliptical rings in the dynamical model of the Galaxy which reproduces distributions of observed velocities derived from Gaia DR3 (EDR3) data along the Galactoc
Externí odkaz:
http://arxiv.org/abs/2308.09762
The distribution of young stars into OB associations has long been in need of updating. High-precision {\sl Gaia} early Data Release 3 astrometry, coupled with modern machine-learning methods, allows this to be done. We have compiled a well-defined s
Externí odkaz:
http://arxiv.org/abs/2206.12935
Publikováno v:
MNRAS, 2021, v. 507, p. 4409
A model of the Galaxy with the outer ring R1R2 can explain the observed distribution of the radial, VR, and azimuthal, VT, velocity components along the Galactocentric distance, R, derived from the Gaia EDR3 data. We selected stars from the Gaia EDR3
Externí odkaz:
http://arxiv.org/abs/2106.09531
This paper presents results from photometric and statistical-parallax analysis of a sample of 850 field RR Lyrae (RRL) variables. The photometric and spectroscopic data for sample RRLs are obtained from (1) our new spectroscopic observations (for 448
Externí odkaz:
http://arxiv.org/abs/2101.03899
Autor:
Utkin, N. D., Dambis, A. K.
We report the first determination of the distance to the Galactic centre based on the kinematics of halo objects. We apply the statistical-parallax technique to the sample of ~2500 Blue Horizontal Branch (BHB) stars compiled by Xue et al. (2011) to s
Externí odkaz:
http://arxiv.org/abs/2009.07316
Autor:
Melnik, A. M., Dambis, A. K.
We estimated the contribution of binary systems to the velocity dispersion inside OB-associations derived from Gaia DR2 proper motions. The maximum contribution to the velocity dispersion is given by the systems with the period of revolution of P=5.9
Externí odkaz:
http://arxiv.org/abs/2009.04577
Autor:
Melnik, A. M., Dambis, A. K.
We calculated the median parallaxes for 47 OB associations including at least 10 stars with known Gaia DR2 parallaxes. A comparison between trigonometric and photometric parallaxes of OB associations reveals a zero-point offset of delta_pi=-0.11 +\-
Externí odkaz:
http://arxiv.org/abs/2006.14649
Autor:
Melnik, A. M., Dambis, A. K.
We study the motions inside 28 OB-associations with the use of Gaia DR2 proper motions. The average velocity dispersion calculated for 28 OB-associations including more than 20 stars with Gaia DR2 proper motion is sigma_v =4.5 km s-1. The median viri
Externí odkaz:
http://arxiv.org/abs/2002.05044
We determine the color excesses, photometric distances, ages, astrometric parallaxes and proper motions for 94 open clusters in the northern part of the Milky Way. We estimate the color excesses and photometric distances based on the data from IPHAS
Externí odkaz:
http://arxiv.org/abs/1807.03391
We cross-match objects from several different astronomical catalogs to determine the absolute proper proper motions of stars within the 30-arcmin radius fields of 115 Milky-Way globular clusters with the accuracy of 1--2~mas/yr. The proper motions ar
Externí odkaz:
http://arxiv.org/abs/1804.07086