Zobrazeno 1 - 10
of 125
pro vyhledávání: '"KUTSCHERA, MAREK"'
Publikováno v:
Phys. Rev. D 105, 023013 (2022)
Radial steady-state accretion of polytropic matter is investigated under cylindrical symmetry in the Levi-Civita background metric. The model can be considered as a cylindrical analog of Bondi accretion in strong gravitational field. As a byproduct o
Externí odkaz:
http://arxiv.org/abs/2208.09024
It is shown that strange quark matter (SQM) objects, stars, and planets, can very efficiently convert the mechanical energy into hadronic energy when they oscillate. This is because the mass density at the edge of SQM objects, $\rho_0{=}4.7{\times}10
Externí odkaz:
http://arxiv.org/abs/2002.09593
Publikováno v:
The Astrophysical Journal, 883:35 (22pp), 2019 September 20
We study cylindrically symmetric steady-state accretion of polytropic test matter spiraling onto the symmetry axis in power-law and logarithmic potentials. The model allows one to qualitatively understand the accretion process in a symmetry different
Externí odkaz:
http://arxiv.org/abs/1906.09192
Observations suggest a slower stellar rotation relative to gas rotation in the outer part of the Milky Way Galaxy. This difference could be attributed to an interaction with the interstellar magnetic field. In a simple model, fields of order 10 micro
Externí odkaz:
http://arxiv.org/abs/1610.07544
Within the disk model framework used to approximately describe flattened galaxies, we develop an iterative method of determining column mass density from rotation curve supplemented with isotropic velocity dispersion profile. This generalizes our pre
Externí odkaz:
http://arxiv.org/abs/1512.02162
Publikováno v:
MNRAS 2015 451 (3): 3366-3370
We study the vertical gradient in azimuthal velocity of spiral galaxy NGC 4244 in a thin disk model. With surface density accounting for the rotation curve, we model the gradient properties in the approximation of quasi-circular orbits and find the p
Externí odkaz:
http://arxiv.org/abs/1504.05903
Publikováno v:
MNRAS 2015 451 (4): 4018-4020
Ring mass density and the corresponding circular velocity in thin disk model are known to be integral transforms of one another. But it may be less familiar that the transforms can be reduced to one-fold integrals with identical weight functions. It
Externí odkaz:
http://arxiv.org/abs/1411.0197
Publikováno v:
A&A 579, A134 (2015)
Recently, we determined a lower bound for the Milky Way mass in a point mass approximation. This result was obtained for most general spherically symmetric phase-space distribution functions consistent with a measured radial velocity dispersion. As a
Externí odkaz:
http://arxiv.org/abs/1410.1051
Publikováno v:
A&A 566, A87 (2014)
In this paper we model the vertical structure of mass distribution of the Milky Way galaxy in the framework of a finite-width global disk model. Assuming the Galactic rotation curve only, we test inside the solar orbit the predictions of the model fo
Externí odkaz:
http://arxiv.org/abs/1404.6108
Publikováno v:
(2012) MNRAS 427: 393-396
The magnetic fields that are present in the galaxy NGC 253 are exceptionally strong. This means that they can influence the rotation of matter and hence the mass-to-light ratio. In this context, we address the issue of the presence of a non-baryonic
Externí odkaz:
http://arxiv.org/abs/1210.3082