Revisit on two-dimensional self-gravitating kinks: superpotential formalism and linear stability
Sign Up to like & getrecommendations! Published in 2021 at "Journal of High Energy Physics"
DOI: 10.1007/jhep04(2021)118
Abstract: Self-gravitating kink solutions of a two-dimensional dilaton gravity are revisited in this work. Analytical kink solutions are derived from a concise superpotential formalism of the dynamical equations. A general analysis on the linear stability is… read more here.
Keywords: two dimensional; linear stability; superpotential formalism; self gravitating ... See more keywords
The instability of viscous self-gravitating protostellar disk affected by density bump
Sign Up to like & getrecommendations! Published in 2017 at "Astrophysics and Space Science"
DOI: 10.1007/s10509-017-3135-7
Abstract: In this work, we study the instability of viscous self-gravitating protostellar disk affected by infalling Low-mass condensations (LMCs) from the envelope of collapsing molecular cloud cores. The infalling low-mass-condensations (LMCs) are considered as density bumps… read more here.
Keywords: disk; density; instability viscous; self gravitating ... See more keywords
Effect of nonthermality on the perturbation dynamics of self-gravitating complex fluids
Sign Up to like & getrecommendations! Published in 2018 at "Astrophysics and Space Science"
DOI: 10.1007/s10509-018-3445-4
Abstract: The perturbation dynamics of an unbounded nonthermal self-gravitating inhomogeneous viscoelastic system composed of two-component constitutive fluids is theoretically investigated. The role of fluid turbulence, which is a highly nonlinear hydrodynamic vorticity-driven phenomenology, is included via… read more here.
Keywords: nonthermality perturbation; self gravitating; effect nonthermality; perturbation dynamics ... See more keywords
Approximate analytical solution for the propagation of shock waves in self-gravitating perfect gas via power series method: isothermal flow
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Astrophysics and Astronomy"
DOI: 10.1007/s12036-020-09638-7
Abstract: For the propagation of a shock (blast) in a self-gravitating perfect gas in case of spherical and cylindrical symmetry, an approximate analytical solution is investigated. The shock wave is considered to be a strong one,… read more here.
Keywords: shock; power series; solution; self gravitating ... See more keywords
Flow behind magnetogasdynamic exponential shock wave in self-gravitating gas
Sign Up to like & getrecommendations! Published in 2017 at "International Journal of Non-linear Mechanics"
DOI: 10.1016/j.ijnonlinmec.2016.11.001
Abstract: Abstract The propagation of a cylindrical (or spherical) shock wave driven out by a piston moving with time according to an exponential law, in a self-gravitating ideal gas with azimuthal magnetic field is investigated. The… read more here.
Keywords: field; self gravitating; shock wave; magnetic field ... See more keywords
Analytic growth rate of gravitational instability in self-gravitating planar polytropes
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2018.837
Abstract: Gravitational instability is a key process that may lead to fragmentation of gaseous structures (sheets, filaments, haloes) in astrophysics and cosmology. We introduce here a method to derive analytic expressions for the growth rate of… read more here.
Keywords: rate gravitational; gravitational instability; self gravitating; growth rate ... See more keywords
The FRIGG project: From intermediate galactic scales to self-gravitating cores
Sign Up to like & getrecommendations! Published in 2018 at "Astronomy and Astrophysics"
DOI: 10.1051/0004-6361/201731071
Abstract: Abridged. Understanding the detailed structure of the interstellar gas is essential for our knowledge of the star formation process. The small-scale structure of the interstellar medium (ISM) is a direct consequence of the galactic scales… read more here.
Keywords: project intermediate; galactic scales; intermediate galactic; self gravitating ... See more keywords
Dynamo effect in unstirred self-gravitating turbulence
Sign Up to like & getrecommendations! Published in 2022 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stac982
Abstract: In many astrophysical environments, self-gravity can generate kinetic energy, which, in principle, is available for driving dynamo action. Using direct numerical simulations, we show that in unstirred self-gravitating subsonic turbulence with helicity and a magnetic… read more here.
Keywords: field; kinetic energy; turbulence; energy ... See more keywords
Tests of gravitational symmetries with pulsar binary J1713+0747
Sign Up to like & getrecommendations! Published in 2018 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/sty2905
Abstract: Symmetries play a fundamental role in modern theories of gravity. The strong equivalence principle (SEP) constitutes a collection of gravitational symmetries which are all implemented by general relativity. Alternative theories, however, are generally expected to… read more here.
Keywords: hat alpha; strongly self; gravitational symmetries; self gravitating ... See more keywords
Forming Pop III binaries in self-gravitating discs: how to keep the orbital angular momentum
Sign Up to like & getrecommendations! Published in 2019 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stz1824
Abstract: The disc fragmentation is a possible process leading to the formation of Population III stellar binary systems. However, numerical simulations show diverse fates of the fragments; some evolve into stable binaries and others merge away… read more here.
Keywords: angular momentum; forming pop; self gravitating; orbital angular ... See more keywords
Self-gravitating planetary envelopes and the core-nucleated instability
Sign Up to like & getrecommendations! Published in 2019 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stz2796
Abstract: Planet formation scenarios can be constrained by the ratio of the gaseous envelope mass relative to the solid core mass in the observed exoplanet populations. One-dimensional calculations find a critical (maximal) core mass for quasi-static… read more here.
Keywords: core nucleated; gravitating planetary; self gravitating; nucleated instability ... See more keywords