STRONG FIELD-TO-FIELD VARIATION OF Lyα NEBULAE POPULATIONS ATz≃ 2.3

Morphological Variation among 23 Xiphinema americanum Populations.

Morphometrics of 23 United States populations of Xiphinema americanum sensu lato, sharing the characteristics of an offset lip region and conoid tail, were examined and analyzed statistically by canonical discriminant analysis (CDA). Specimens were collected from Arkansas, Georgia, Tennessee, Mississippi, Florida, Oklahoma, California, and North Dakota. Eleven measurements and body ratios obtai...

Strong-field Radiative Scattering

Strong Field, Noncommutative QED

We review the effects of strong background fields in noncommutative QED. Beginning with the noncommutative Maxwell and Dirac equations, we describe how combined noncommutative and strong field effects modify the propagation of fermions and photons. We extend these studies beyond the case of constant backgrounds by giving a new and revealing interpretation of the photon dispersion relation. Cons...

Relativistic strong-field photoionization

A systematic development is presented of a strong-field method for photoionization of atoms and molecules. The strong-field requirement demands a relativistic treatment. A Dirac theory is developed. The exact S matrix is expanded on the premise that the plane-wave field is stronger than the binding of the atom or molecule. The leading term of this expansion is the strong-field approximation. Th...

Dependence of Heliospheric Lyα Absorption on the Interstellar Magnetic Field

We use newly developed 3D kinetic MHD models of the heliosphere to predict heliospheric H I Lyα absorption for various lines of sight. These predictions are compared with actual Lyα spectra from the Hubble Space Telescope, many of which have yielded previous detections of heliospheric absorption. We find that the absorption predicted by the models is weakly affected by both the magnitude and or...