Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Sergey D. Ustyugov"'
We show that simulations of magnetohydrodynamic turbulence in the multiphase interstellar medium yield an $E/B$ ratio for polarized emission from Galactic dust in broad agreement with recent $Planck$ measurements. In addition, the $B$-mode spectra di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ffe402745da71b840f1fd596e0f109d0
http://arxiv.org/abs/1711.11108
http://arxiv.org/abs/1711.11108
We explore the structure and statistics of multiphase, magnetized ISM turbulence in the local Milky Way by means of driven periodic box numerical MHD simulations. Using the higher order-accurate piecewise-parabolic method on a local stencil (PPML), w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4d0eb7f0cfddf10253b4aae07e83ced2
http://arxiv.org/abs/1705.01912
http://arxiv.org/abs/1705.01912
Autor:
Åke Nordlund, Mika Juvela, Paolo Padoan, David C. Collins, T. Lunttila, Sergey D. Ustyugov, Alexei G. Kritsuk, Michael Normal
Publikováno v:
Proceedings of the International Astronomical Union. 6:187-196
Supersonic magneto-hydrodynamic (MHD) turbulence in molecular clouds (MCs) plays an important role in the process of star formation. The effect of the turbulence on the cloud fragmentation process depends on the magnetic field strength. In this work
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::84c93bab1c705c39f0a5ac9efcc5307e
https://doi.org/10.1017/s1743921311017601
https://doi.org/10.1017/s1743921311017601
Publikováno v:
Journal of Computational Physics. 228:7614-7633
Stable, accurate, divergence-free simulation of magnetized supersonic turbulence is a severe test of numerical MHD schemes and has been surprisingly difficult to achieve due to the range of flow conditions present. Here we present a new, higher order
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::05ec97f269536e8a4d48ba1af1ee841b
https://doi.org/10.1016/j.jcp.2009.07.007
https://doi.org/10.1016/j.jcp.2009.07.007
Autor:
Mikhail V. Popov, Sergey D. Ustyugov
Publikováno v:
Hyperbolic Problems: Theory, Numerics and Applications. :869-878
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f4954082d182924cb14f1ffe1eaf78f2
https://doi.org/10.1090/psapm/067.2/2605282
https://doi.org/10.1090/psapm/067.2/2605282
Autor:
Sergey D. Ustyugov, M. V. Popov
Publikováno v:
Computational Mathematics and Mathematical Physics. 47:1970-1989
A numerical method based on piecewise parabolic difference approximations is proposed for solving hyperbolic systems of equations. The design of its numerical scheme is based on the conservation of Riemann invariants along the characteristic curves o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eb8d89e8a50c3648a6977daf00981291
https://doi.org/10.1134/s0965542507120081
https://doi.org/10.1134/s0965542507120081
Publikováno v:
Astronomy Reports. 49:450-458
We present a technique to calculate the boundary conditions for simulations of the development of large-scale convective instability in the cores of rotating white-dwarf progenitors of type Ia supernovae. The hydrodynamical equations describing this
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2379e4d088301b542ca36f13dd4fe8ee
https://doi.org/10.1134/1.1941486
https://doi.org/10.1134/1.1941486
Development of the geometric structure of the thermonuclear-deflagration front in type Ia supernovae
Publikováno v:
Astronomy Reports. 48:921-933
Three-dimensional hydrodynamical simulations of the development of a large-scale instability accompanying deflagration in the degenerate cores of rotating white dwarfs—progenitors of type-Ia supernovae—are presented. The numerical algorithm used
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0a949bd1bdaf2a74f96c482b4e47ddcb
https://doi.org/10.1134/1.1822974
https://doi.org/10.1134/1.1822974
Publikováno v:
Astronomy Reports. 45:241-247
Neutrino transfer via convective flow to the surface of a proto-neutron star is numerically simulated. The evolution of the neutrino distribution in a heated region rising from the center of the proto-neutron star to its surface is simulated using a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::85b8972d19bc3b96e2a75f88deab6081
https://doi.org/10.1134/1.1353365
https://doi.org/10.1134/1.1353365
Publikováno v:
Astronomy & Astrophysics
According to time-distance helioseismology, information about internal fluid motions is encoded in the travel times of solar waves. The inverse problem consists of inferring 3-D vector flows from a set of travel-time measurements. Here we investigate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7e692bad51691bf32e3a017fa66d0ad6