In the strong magnetic elds of typical radio pulsars atomic lines and photoionization edges lie in the soft X-ray part of the spectrum giving the dominant contribution to the opacity. Improved photoionization cross sections are presented for a hydrogen atmosphere and magnetic elds of 10 11 ? 10 13 G, exhibiting novel Beutler{Fano resonance features due to the contribution of autoionizing atomic...

Magnetization reversal phenomena in a submicron magnetic wire with a trilayer structure were investigated by measuring the electric resistance in external magnetic "elds. The critical "eld for domain wall nucleation was observed to be slightly di!erent for each "eld sweep. The magnetoresistance measurements were repeated 200 times with a sweep rate of 6 Oe/s. The obtained distribution of critic...

This paper 1 reviews the contrasting properties of radio and EUV/X{ray observations for the study of the solar atmosphere. The emphasis is placed on explaining the nature of radio observations to an EUV/X{ray audience. Radio emission is produced by mechanisms which are well-understood within classical physics. Bremsstrahlung tends to be dominant at low frequencies, while gyroresonance emission ...

X-ray spectroscopy performed by diierent astronomical spacecrafts has shown that many active late-type stars possess coronae. For such reason, the magnetic structure of stellar coronae has raised considerable interest and, by analogy with the Sun, it is generally assumed that stellar coronae are structured by magnetic elds having the shape of arcades. Most of those coronal magnetic eld conngura...

We question the use of stable asymptotic scattering states in QED of strong magnetic elds. To correctly describe excited Landau states and photons above the pair creation threshold the asymptotic elds are chosen as generalized Licht elds. In this way the o -shell behavior of unstable particles is automatically taken into account, and the resonant divergences that occur in scattering cross secti...

We consider discrete random magnetic Laplacians in the plane and discrete random electromagnetic Laplacians in higher dimensions. The existence of these objects relies on a theorem of Feldman-Moore which was generalized by Lind to the nonabelian case. For example, it allows to realize ergodic Schrr odinger operators with stationary independent magnetic elds on discrete two dimensional lattices ...

We summarizerecent results from self-consistent non-LTE radiation hydrodynamicssimulations of the propagation of acoustic waves through the non-magnetic solar chromosphere. References to more detailed write-ups of the work are given. The simulations closely match the observed behaviour of Ca II H 2 V bright grains. Observations of CO-lines, that are problematicto explain in semi-empiricalone-co...

Exact superstring solutions are constructed in 4-D space-time, with positive curvature and non-trivial dilaton and antisymmetric tensor elds. The full spectrum of string excitations is derived as a function of moduli elds T i and the scale 2 = 1=(k + 2) which is induced by the non-zero background elds. The spectrum of string excitations has a non-zero mass gap 2 and in the weak curvature limit ...

We derive practical expressions for a rapid and accurate evaluation of electric and thermal conductivities and thermopower of degenerate relativistic electrons along quantizing magnetic elds in outer neutron star crusts. We consider the electron Coulomb scattering on ions in liquid matter, as well as on high-temperature phonons or charged impurities in solid matter. We propose also a reasonable...