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对近年升空的CHAMP和GRACE和将于2007年升空的GOCE卫星在测定地球重力场方面的技术特点和初步成果进行了回顾、比较和评估。并对它们今后在静态和动态的地球重力场构模方面可能的进展作一展望。现在只用一颗重力卫星的轨道摄动数据，就可以以前所未有的可靠性和精确性来求定地球重力场的长波和部分中波。如CHAMP重力卫星的33个月数据所求定的地球重力场模型,相对于曾利用多颗卫星资料所推算的GR1M5...
On Some Aspects of Gravitomagnetism in Scalar-Tensor Theories of Gravity
Gravitomagnetism Scalar-Tensor Theories of Gravity
2010/10/15
We discuss the gravitomagnetism in the context of scalar-tensor theories of gravity. We obtain the equation of motion of a particle in terms of gravitoelectric and gravitomagnetic fields. We discuss t...
Resonant Transducers for Spherical Gravitational Wave Detectors
Resonant Transducers Spherical Gravitational Wave Detectors
2010/10/18
”Mario Schenberg” is a spherical gravitational wave (GW) detector that will be part of a GW detection array of two detectors. Another one is been built in The Netherlands. Spherical gravitational wave...
Challenges in Signal Analysis of Resonant-Mass Gravitational Wave Detectors
Signal Analysis Resonant-Mass Gravitational Wave Detectors
2010/10/18
An overview of the main points related to data analysis in resonant-mass gravitational wave detectors will be presented. Recent developments on the data analysis system for the Brazilian detector SCHE...
Corrections to the Entropy in Higher Order Gravity
Higher Order Gravity the Lovelock gravity
2010/10/18
Thermal corrections to the entropy of black holes in the Lovelock gravity are calculated. As the thermodynamic behavior of the black holes of this theory falls into two classes, the thermodynamic quan...
Braneworld with Induced Axial Symmetry
Induced Axial Symmetry arbitrary gravitational perturbations
2010/10/18
We take arbitrary gravitational perturbations of a 5d spacetime and reduce it to the form an axially symmetric warped braneworld. Then, we write the filed equations for the linearized gravity perturba...
Braneworld Black Holes as Gravitational Lenses
Braneworld Black Holes Gravitational Lenses
2010/10/18
Black holes acting as gravitational lenses produce, besides the primary and secondary weak field images, two infinite sets of relativistic images. These images can be studied using the strong field li...
Some Effects on Quantum Systems due to the Gravitational Field of a Topological Defect
Quantum Systems the Gravitational Field a Topological Defect
2010/10/18
We study the behavior of a non-relativistic quantum particle interacting with different potentials, in the background space-time generated by a cosmic string. We find the energy spectra for the quantu...
Some Remarks on the Semi-Classical Limit of Quantum Gravity
the Semi-Classical Limit Quantum Gravity
2010/10/13
One of the most important issues in quantum gravity is to identify its semi-classical regime. First the issue is to define for we mean by a semi-classical theory of quantum gravity, then we would like...
Holographic Gravity and the Surface term in the Einstein-Hilbert Action
Holographic Gravity the Surface term the Einstein-Hilbert Action
2010/10/13
Certain peculiar features of Einstein-Hilbert (EH) action provide clues towards a holographic approach to gravity which is independent of the detailed microstructure of spacetime. These features of th...
I show that Einstein Gravity can be thought of as arising from the defects in a world crystal whose lattice spacing is of the order of the Planck length lP ≈ 10−33cm, and whose elastic energy is...
The Feynman Propagator for Quantum Gravity: Spin Foams, Proper Time, Orientation, Causality and Timeless-Ordering
Quantum Gravity Spin Foams Proper Time Orientation Causality Timeless-Ordering
2010/10/14
We discuss the notion of causality in Quantum Gravity in the context of sum-over-histories approaches, in the absence therefore of any background time parameter. In the spin foam formulation of Quantu...
Exact Uncertainty Principle and Quantization: Implications for the Gravitational Field
Exact Uncertainty Principle and Quantization the Gravitational Field
2010/10/14
The quantization of the gravitational field is discussed within the exact uncertainty approach. The method may be described as a Hamilton-Jacobi quantization of gravity. It differs from previous appro...
Spin Flavor Oscillation of Neutrinos in Rotating Gravitational Fields and Their Effects on Pulsar Kicks
Spin Flavor Oscillation Neutrinos Rotating Gravitational Fields Pulsar Kicks
2010/10/14
The origin of high velocities of pulsars is studied by considering the spin-flip conversion of neutrinos propagating in a gravitational field of a protoneutron star. For a rotating gravitational sourc...
Cosmology and Gravitation
Cosmology Gravitation
2010/10/26
This is a brief summary with comments on selected contributions to the Cosmology and Gravitation section at the 24th Brazilian Meeting on Particle and Fields (ENFPC XXIV), held at Caxambu, from Septem...