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pro vyhledávání: '"Nikiforov, I. A."'
Autor:
Nikiforov, Alexander I., Chesnokov, Evgenij A., Nikiforov, I. A., Popov, Andrey G., Maslakov, Konstantin I.
Publikováno v:
Известия Саратовского университета. Новая серия: Серия Химия. Биология. Экология, Vol 22, Iss 4, Pp 390-397 (2022)
In the course of this work, fl uorinated catalysts MoO3 /Al2 O3 -F for the olefi ns metathesis have been synthesized. The materials have been characterized by various physicochemical methods and tested in the propylene metathesis reaction. It has bee
Externí odkaz:
https://doaj.org/article/3660be5aa3754dce9ce66413d05e780b
Autor:
Gromov, A. O., Nikiforov, I. I.
Publikováno v:
Astrophysical Bulletin, V. 76, Is. 2, P. 146-156 (2021)
A three-component Stackel model of the Galaxy, including the bulge, disk, and halo, is constructed. Parameter estimates of the potential are obtained as a result of fitting the model rotation curve to azimuthal velocities found from data on trigonome
Externí odkaz:
http://arxiv.org/abs/2110.12215
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Autor:
Nikiforov, I. I., Veselova, A. V.
Publikováno v:
Astronomy Letters, 2018, Vol. 44, No. 11, pp. 699-719
The influence of various factors on the statistical properties of the Galactic center distance ($R_0$) estimate obtained by solving the general problem of determining the geometric parameters of a Galactic spiral arm from its segment with the inclusi
Externí odkaz:
http://arxiv.org/abs/1811.06886
Geometric Aspects and Testing of the Galactic Center Distance Determination from Spiral Arm Segments
Autor:
Nikiforov, I. I., Veselova, A. V.
Publikováno v:
Astronomy Letters, 2018, Vol. 44, No. 2, pp. 81-102
We consider the problem of determining the geometric parameters of a Galactic spiral arm from its segment by including the distance to the spiral pole, i.e., the distance to the Galactic center ($R_0$). The question about the number of points belongi
Externí odkaz:
http://arxiv.org/abs/1802.04510
Autor:
Nikiforov, I. I., Agladze, E. V.
Publikováno v:
Astronomy Letters, 2017, Vol. 43, No. 2, pp. 75-105
We have checked the existence of a zone of avoidance oriented along the Galactic rotation axis in the globular cluster (GC) system of the Galaxy and performed a parametrization of this zone in the axisymmetric approximation. We show that an unambiguo
Externí odkaz:
http://arxiv.org/abs/1712.10257
Autor:
Nikiforov, I. V., Titkov, V. V., Aksenov, S. M., Lazoryak, B. I., Baryshnikova, O. V., Deineko, D. V.
Publikováno v:
Journal of Structural Chemistry; Aug2024, Vol. 65 Issue 8, p1668-1676, 9p
Publikováno v:
Baltic Astronomy. 25: No. 1, 53-59, 2016
A dynamic model of the Galaxy is constructed based on kinematic data for masers with trigonometric parallaxes. Maser data is used to compute the model potential in the Galactic plane. The potential is then generalized to three dimensions assuming the
Externí odkaz:
http://arxiv.org/abs/1609.04283
Autor:
Nikiforov, I. I., Veselova, A. V.
Publikováno v:
Baltic Astronomy. 24: No. 4, 387-394, 2015
A new approach to determining the solar galactocentric distance, $R_0$, from the geometry of spiral-arm segments is proposed. Geometric aspects of the problem are analyzed and a simplified three-point method for estimating $R_0$ from objects in a spi
Externí odkaz:
http://arxiv.org/abs/1604.05233
Publikováno v:
Baltic Astronomy. 24: No. 2, 150-156, 2015
An earlier derived quasi-isothermal St\"ackel's model of mass distribution in stellar systems and the corresponding formula for space density are applied to our Galaxy. The model rotation curve is fitted to HI kinematical data. The structural and sca
Externí odkaz:
http://arxiv.org/abs/1508.05298