Results 51 to 60 of about 325,405 (197)

Modified celestial amplitude in Einstein gravity

Journal of High Energy Physics, 2020
In this paper we evaluate the modified celestial amplitude for gravitons and gluons, as defined in [4]. We find that the modified (tree) amplitude is finite for gravitons in Einstein gravity.
Shamik Banerjee, Sudip Ghosh, Pranjal Pandey, Arnab Priya Saha   +3 more
doaj   +1 more source

Null pronominal objects in Hungarian [PDF]

, 2012
The paper argues against the wide-spread view that assumes a direct correlation between object–verb agreement and object pro-drop in Hungarian. Whereas object–verb agreement has been present in Hungarian since the first written sources, and can be ...
É. Kiss, Katalin
core  

Horizon energy and angular momentum from a Hamiltonian perspective

, 2005
Classical black holes and event horizons are highly non-local objects, defined in terms of the causal past of future null infinity. Alternative, (quasi)local definitions are often used in mathematical, quantum, and numerical relativity.
Arnold V I, Arnowitt R, Ashtekar A, Ashtekar A, Ashtekar A, Ashtekar A Galloway G, Booth I, Booth I Brits L Gonzalez J Van Den Broeck C, Booth I Fairhurst S, Booth I S, Brown J D, Chruściel P T, Hawking S W, Hawking S W, Israel W, Ivan Booth, Poisson E, Stephen Fairhurst, Wald R M   +18 more
core   +1 more source

Gravitationally Lensed Gamma-Ray Bursts as Probes of Dark Compact Objects [PDF]

, 1998
If dark matter in the form of compact objects comprises a large fraction of the mass of the universe, then gravitational lensing effects on gamma-ray bursts are expected.
Carr B. J., G. F. Marani, Hurley K., J. P. Norris, J. T. Bonnell, K. Hurley, R. J. Nemiroff   +6 more
core   +3 more sources

Frames of reference in spaces with affine connections and metrics

, 1999
A generalized definition of a frame of reference in spaces with affine connections and metrics is proposed based on the set of the following differential-geometric objects: (a) a non-null (non-isotropic) vector field, (b) the orthogonal to the vector
Fiziev P, Gogsadze Sh P, Hartley D, Hehl F W, Iliev B Z, Iliev B Z, Iliev B Z, Iliev B Z, Iliev B Z, Iliev B Z, Ivanitskaja O S, Ivanitskaja O S, Kleinert H, Linez A M, Manoff S, Manoff S, Manoff S, Manoff S, Manoff S, Manoff S, Manoff S, Mizkjewitsch N V, Moeller C, Nesterov A I, Norden A P, Raschewski P K, Roditchev V I, Roditchev V I, S Manoff, Saa A, Saa A, Saa A, Schmutzer E, Sinjukov N S, Uhlmann A, Vladimirov J S   +35 more
core   +2 more sources

Null objects and accusative clitics in Romanian

Bucharest Working Papers in Linguistics, 2009
Starting from the identification of the obligatory contexts in which the Accusative clitic occurs in Romanian we offer a unifying analysis of its role across all the identified contexts.
Martine Coene, Larisa Avram
doaj  

Optical properties of null geodesics emerging from dynamical systems

European Physical Journal C: Particles and Fields, 2022
We study optical metrics via null geodesics as a central force system, deduce the related Binet equation and apply the analysis to certain solutions of Einstein’s equations with and without spherical symmetry.
D. Batic, S. Chanda, P. Guha
doaj   +1 more source

A method to measure a relative transverse velocity of source-lens-observer system using gravitational lensing of gravitational waves

, 2009
Gravitational waves propagate along null geodesics like light rays in the geometrical optics approximation, and they may have a chance to suffer from gravitational lensing by intervening objects, as is the case for electromagnetic waves.
A. R. Thompson, Makoto Hattori, P. Schneider, R. Kayser, Toshifumi Futamase, Yousuke Itoh   +5 more
core   +1 more source

Mass Segregation in Globular Clusters [PDF]

, 2001
We present the results of a new study of mass segregation in two-component star clusters, based on a large number of numerical N-body simulations using our recently developed dynamical Monte Carlo code.
de la Fuente Marcos R., F. A. Rasio, Giersz M., Howell J. H., J. M. Fregeau, Jetzer P., K. J. Joshi, Kroupa P., Makino J., Mandushev G., Paczynski B., Refsdal S., S. F. Portegies Zwart, Spitzer L., Jr., Vesperini E.   +14 more
core   +3 more sources

Curvature tensors on distorted Killing horizons and their algebraic classification

, 2005
We consider generic static spacetimes with Killing horizons and study properties of curvature tensors in the horizon limit. It is determined that the Weyl, Ricci, Riemann and Einstein tensors are algebraically special and mutually aligned on the horizon.
Ashtekar A, Brill D, Brill D, Carter B, Carter B, Frolov V P, Hall G S, Hawking S W, Joly G C, Medved A J M, O B Zaslavskii, Papadopoulos D, Penrose R, Plebański J F, Stephani H, V Pravda, Wald R M, Zaslavskii O B   +17 more
core   +1 more source