H. Ardavan

Comparison of multiwavelength observations of 9 broad-band pulsars with the spectrum of the emission from an extended current with a superluminally rotating distribution pattern (2009)

Ardavan, H., Ardavan, A., Singleton, J., Fasel, J., Junor, W., Middleditch, J., ...

The observed spectra of 9 pulsars for which multiwavelength data are available from radio to $X$- or $\gamma$-ray bands (Crab, Vela, Geminga, B0656+14, B1055-52, B1509-58, B1706-44, B1929+10, and...

Mechanism of generation of the emission bands in the dynamic spectrum of the Crab pulsar (2008)

Ardavan, H., Ardavan, A., Singleton, J., Perez, M.

We show that the proportionately spaced emission bands in the dynamic spectrum of the Crab pulsar (Hankins T. H. & Eilek J. A., 2007, ApJ, 670, 693) fit the oscillations of the square of a Bessel...

Occurrence of concurrent `orthogonal' polarization modes in the Lienard-Wichert field of a rotating superluminal source (2007)

Schmidt, A., Ardavan, H., Fasel, J., Singleton, J., Ardavan, A.

We evaluate the Lienard-Wiechert field of a rotating superluminal point source numerically and show that this radiation field has the following intrinsic characteristics. (i) It is sharply focused...

Comment on "Radial dependence of radiation from a bounded source" by Kirk T. McDonald (2006)

Ardavan, A., Ardavan, H., Singleton, J.

The purpose of this note is to point out that McDonald's criticism of our work \cite{r1} is based on a circular argument. In order to show that the field of a bounded source falls off as...

Experimental demonstration of a new radiation mechanism: emission by an oscillating, accelerated, superluminal polarization current (2004)

Ardavan, A., Singleton, J., Ardavan, H., Fopma, J., Halliday, D., Hayes, W.

We describe the experimental implementation of a superluminal ({\it i.e.} faster than light {\it in vacuo}) polarization current distribution that both oscillates and undergoes centripetal...

The spectral and polarization characteristics of the nonspherically decaying radiation generated by polarization currents with superluminally rotating distribution patterns (2003)

Ardavan, H., Ardavan, A., Singleton, J.

We present a theoretical study of the emission from a superluminal polarization current whose distribution pattern rotates (with an angular frequency $\omega$) and oscillates (with a frequency...

The frequency spectrum of focused broadband pulses of electromagnetic radiation generated by polarization currents with superluminally rotating distribution patterns (2002)

Ardavan, H., Ardavan, A., Singleton, J.

We investigate the spectral features of the emission from a superluminal polarization current whose distribution pattern rotates with an angular frequency $\omega$ and oscillates with an...

Violation of the inverse square law by the emissions of supersonically and superluminally moving volume sources (1995)

Ardavan, H., Williams, J. E. Ffowcs

The generally familiar notion that the conservation of energy requires the intensity of the radiation generated by a localized finite-duration source to decay like the inverse square of the distance...

Splitting of the Alfven surface in a relativistic pulsar wind (1995)

Ardavan, H.

In a recent paper, Li and Melrose have claimed that the splitting - due to relativistic effects - of the Alfven surface in an axisymmetric pulsar wind does not occur. Here we refute this claim by...