Zobrazeno 1 - 10
of 113
pro vyhledávání: '"Linear perturbation theory"'
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Publikováno v:
Advances in Space Research. 65:1607-1614
In this paper, we extend the stability analysis of cold sharp shear flows to warm astrophysical cases with, inevitable, gradual velocity gradient in the interface region in the presence of viscosity effect. Using linear perturbation theory as well as
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d14b5054e024f15f6c6ecf71b935a8ca
https://doi.org/10.1016/j.asr.2019.12.020
https://doi.org/10.1016/j.asr.2019.12.020
Publikováno v:
Physical Review D. 103
We propose a new framework for studying the cosmology of $f(R)$ gravity which completely avoids using the reconstruction program. This allows us to easily obtain a qualitative feel of how much the $\mathrm{\ensuremath{\Lambda}}\mathrm{CDM}$ model dif
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::273475562c171995abd4fea45f167fd0
https://doi.org/10.1103/physrevd.103.124040
https://doi.org/10.1103/physrevd.103.124040
Autor:
E. V. Polyachenko, I. G. Shukhman
Using the canonical Hamilton-Jacobi approach we study the Lynden-Bell concept of bar formation based on the idea of orbital trapping parallel to the long or short axes of the oval potential distortion. The concept considered a single parameter - a si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c666537b524183dd59cac675dcb7237d
http://arxiv.org/abs/2007.05187
http://arxiv.org/abs/2007.05187
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 2, Pp 1-8 (2019)
European Physical Journal
European Physical Journal
We study the matter power spectra in the viable $f(R)$ gravity models with the dynamical background evolution and linear perturbation theory by using the CosmoMC package. We show that these viable $f(R)$ models generally shorten the age of the univer
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9c88de25aa86a6ad9a3e7878ce3e498e
https://doi.org/10.1140/epjc/s10052-019-6613-y
https://doi.org/10.1140/epjc/s10052-019-6613-y
Autor:
Shigeki Inoue, Naoki Yoshida
We study the gravitational instability and fragmentation of primordial protostellar discs by using high-resolution cosmological hydrodynamics simulations. We follow the formation and evolution of spiral arms in protostellar discs, examine the dynamic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::252beafa0a6444f40fd8cabbd3bf7c20
Autor:
Chunshan Lin, Misao Sasaki
Publikováno v:
Physics Letters B, Vol 752, Iss C, Pp 84-88 (2016)
Physics Letters B
Physics Letters B
We propose a mechanism to evade the Lyth bound in models of inflation. We minimally extend the conventional single-field inflation model in general relativity (GR) to a theory with non-vanishing graviton mass in the very early universe. The modificat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5a7bfeffa0b362a43c4f5718d3f75e5a
https://doi.org/10.1016/j.physletb.2015.11.021
https://doi.org/10.1016/j.physletb.2015.11.021
Autor:
Hermann Riedel
Publikováno v:
International Journal of Fatigue. 131:105332
The paper explores the effect of brittle particles on fatigue crack growth. A model based on the theory of slightly curved crack fronts predicts that fatigue crack growth is enhanced if the applied stress intensity factor is greater than the fracture
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e06f6484e1ef45938c4bbaf7f6628843
https://doi.org/10.1016/j.ijfatigue.2019.105332
https://doi.org/10.1016/j.ijfatigue.2019.105332
Publikováno v:
Tram, T, Brandbyge, J, Dakin, J & Hannestad, S 2019, ' Fully relativistic treatment of light neutrinos in N-body simulations ', Journal of Cosmology and Astroparticle Physics, vol. 2019, no. 3, 022 . https://doi.org/10.1088/1475-7516/2019/03/022
Cosmological $N$-body simulations are typically purely run with particles using Newtonian equations of motion. However, such simulations can be made fully consistent with general relativity using a well-defined prescription. Here, we extend the forma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::024611c09f8b8c84aa076452352d25dc
http://arxiv.org/abs/1811.00904
http://arxiv.org/abs/1811.00904