Results 11 to 20 of about 79,565 (217)

Quasi-radial modes of pulsating neutron stars: numerical results for general-relativistic rigidly rotating polytropic models [PDF]

open access: yes, 2014
In this paper we compute general-relativistic polytropic models simulating rigidly rotating, pulsating neutron stars. These relativistic compact objects, with a radius of $\sim 10 \, \mathrm{km}$ and mass between $\sim 1.4$ and $3.2$ solar masses, are ...
Geroyannis, Vassilis   +1 more
core   +1 more source

Short-axis-mode rotation of a free rigid body by perturbation series [PDF]

open access: yes, 2013
A simple rearrangement of the torque free motion Hamiltonian shapes it as a perturbation problem for bodies rotating close to the principal axis of maximum inertia, independently of their triaxiality.
Lara, Martin
core   +1 more source

OGLE-2009-BLG-092/MOA-2009-BLG-137: A Dramatic Repeating Event With the Second Perturbation Predicted by Real-Time Analysis [PDF]

open access: yes, 2010
We report the result of the analysis of a dramatic repeating gravitational microlensing event OGLE-2009-BLG-092/MOA-2009-BLG-137, for which the light curve is characterized by two distinct peaks with perturbations near both peaks.
A. Allan   +129 more
core   +3 more sources

Dynamics of dark energy in collapsing halo of dark matter [PDF]

open access: yes, 2015
We investigate the non-linear evolution of spherical density and velocity perturbations of dark matter and dark energy in the expanding Universe. For that we have used the conservation and Einstein equations to describe the evolution of gravitationally ...
Novosyadlyj, B., Tsizh, M.
core   +1 more source

Interpretation of Strong Short-Term Central Perturbations in the Light Curves of Moderate-Magnification Microlensing Events [PDF]

open access: yes, 2009
To improve the planet detection efficiency, current planetary microlensing experiments are focused on high-magnification events searching for planetary signals near the peak of lensing light curves.
A. Allan   +105 more
core   +3 more sources

Forced magnetic reconnection and plasmoid coalescence: I - MHD Simulations [PDF]

open access: yes, 2019
Forced magnetic reconnection, a reconnection event triggered by external perturbation, should be ubiquitous in the solar corona. Energy released during such cases can be much greater than that which was introduced by the perturbation.
Browning, Philippa   +2 more
core   +2 more sources

The properties of the local spiral arms from RAVE data: two-dimensional density wave approach [PDF]

open access: yes, 2012
Using the RAVE survey, we recently brought to light a gradient in the mean galactocentric radial velocity of stars in the extended solar neighbourhood.
A. Helmi   +75 more
core   +10 more sources

Self-consistent massive disks in triaxial dark matter halos [PDF]

open access: yes, 2007
Galactic disks in triaxial dark matter halos become deformed by the elliptical potential in the plane of the disk in such a way as to counteract the halo ellipticity. We develop a technique to calculate the equilibrium configuration of such a disk in the
Alberto D. Bolatto   +6 more
core   +2 more sources

The Direct Effect of Toroidal Magnetic Fields on Stellar Oscillations: An Analytical Expression for the General Matrix Element [PDF]

open access: yes, 2017
Where is the solar dynamo located and what is its modus operandi? These are still open questions in solar physics. Helio- and asteroseismology can help answer them by enabling us to study solar and stellar internal structures through global oscillations.
Kiefer, René   +2 more
core   +2 more sources

Intensity interferometry for observation of dark objects

open access: yes, 2013
We analyze an intensity interferometry measurement carried out with two point-like detectors facing a distant source (e.g., a star) that may be partially occluded by an absorptive object (e.g., a planet).
Erkmen, Baris I.   +2 more
core   +1 more source

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