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28 papers · 1 filter
Instantaneous fields in classical electrodynamics
Jose A. Heras
In this paper we express the retarded fields of Maxwell's theory in terms of the instantaneous fields of a Galilei-invariant electromagnetic and we find the vector function whose s…
Comment on 'A generalized Helmholtz theorem for time-varying vector fields by A. M. Davis, [Am. J. Phys. 74, 72-76 (2006)]'
Jose A. Heras
In a recent paper Davis formulated a generalized Helmholtz theorem for a time-varying vector field in terms of the Lorenz gauge retarded potentials. The purposes of this comment ar…
How far away is far enough for extracting numerical waveforms, and how much do they depend on the extraction method?
Enrique Pazos, Ernst Nils Dorband, Alessandro Nagar +3
We present a method for extracting gravitational waves from numerical spacetimes which generalizes and refines one of the standard methods based on the Regge--Wheeler--Zerilli pert…
Learning about compact binary merger: the interplay between numerical relativity and gravitational-wave astronomy
Thomas Baumgarte, Patrick Brady, Jolien D E Creighton +3
Activities in data analysis and numerical simulation of gravitational waves have to date largely proceeded independently. In this work we study how waveforms obtained from numerica…
A detection of the donor star of Aquila X-1 during its 2004 outburst?
R. Cornelisse, J. Casares, D. Steeghs +4
Phase-resolved high resolution optical spectroscopy has revealed narrow N III and He II emission lines from the soft X-ray transient Aquila X-1 during its 2004 outburst that move a…
A General Framework for Extending Means to Higher Orders
Jimmie Lawson, Yongdo Lim
In this paper we study the problem of extending means to means of higher order. We show how higher order means can be inductively defined and established in general metric spaces,…