Infall of a Particle into a Black Hole as a Model for Gravitational Radiation from the Galactic Center
نویسنده
چکیده
I present here the results of the study of the gravitational radiation generated by the infall (from rest at radius r0) of a point particle of mass m0 into a Schwarzschild black hole of mass M . We use Laplace’s transform methods and find that the spectra of radiation for ∼ 5M < r0 < ∞ presents a series of evenly spaced bumps. The total radiated energy is not monotonically decreasing with r0, but presents a joroba (hunch-back) at around r0 ≈ 4.5M . I finally discuss the detectability of the gravitational radiation coming from the black hole in the center of our galaxy.
منابع مشابه
A One-Parameter Family of Time-Symmetric Initial Data for the Radial Infall of a Particle into a Schwarzschild Black Hole
A one-parameter family of time-symmetric initial data for the radial infall of a particle into a Schwarzschild black hole is constructed within the framework of black-hole perturbation theory. The parameter measures the amount of gravitational radiation present on the initial spacelike surface. These initial data sets are then evolved by integrating the Zerilli-Moncrief wave equation in the pre...
متن کاملThe effect of variation of stellar dispersion velocities by the galactic latitude in interpreting gravitational microlensing observations
Our galaxy is a spiral galaxy and its stars are mostly in a thin disk and rotate around the galactic center. The vertical component of the dispersion velocity of stars is a function of the galactic latitude and decreases with increasing it. In the galactic Besancon model, this dependence is ignored and they just consider the dependence of dispersion velocity on the stellar age. Becanson model i...
متن کاملComparison of the Accuracy of Black Hole Algorithms and Gravitational Research and the Hybrid Method in Portfolio Optimization
The main purpose of this research is portfolio optimization in Tehran securities exchange using the black hole algorithm and the Gravitational Research algorithm. We also propose an algorithm named Hybrid Algorithm which combines the two algorithms above to cover the weaknesses of these two algorithms. Finally we compare the results with the Markowitz model and choose the optimal algorithm.<br ...
متن کاملRelativistic Effects in Proper Motions of Stars Surrounding the Galactic Center
We simulate the astrometric observations of stars moving close to the black hole in the Galactic Center. We show, that for orbits ≤ 10 AU and position measurements with the accuracy of the Keck Interferometer, the periastron motion of elliptical orbits will be measurable. The models of star trajectories neglecting the periastron motion will be easy to reject with the high confidence level. The ...
متن کاملA note on gravitational wave lensing
In a recent paper (Ruffa 1999) it was proposed that the massive black hole at the Galactic center may act as a gravitational lens focusing gravitational wave energy to the Earth. Considering the gravitational wave signal emitted by galactic spinning pulsars, an enhancement in the gravitational wave intensity by a factor of a few thousand is found. For galactic and extra-galactic sources the int...
متن کامل