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

