Radiation forces on dust envelopes

On modeling radiation-driven envelopes at arbitrary optical depths

We consider stationary outflowing stellar envelopes accelerated by radiation pressure. Making use of solutions of the transfer equation in the Eddington approximation, we derive relations for pressure, radiation energy density, and radiative energy flux at arbitrary optical depth τ . These relations are used in the equations of radiative hydrodynamics, which can be solved numerically. The solut...

Surface plasmon radiation forces.

We report the first experimental observation of momentum transfer from a surface plasmon to a single dielectric sphere. Using a photonic force microscope, we measure the plasmon radiation forces on different polystyrene beads as a function of their distance from the metal surface. We show that the force magnitude at resonance is strongly enhanced compared to a nonresonant illumination. Measurem...

Polarized Microwave Radiation from Dust

Observations of cosmic microwave background in the range 10-90 GHz have revealed an anomalous foreground component well correlated with 12 μm, 60 μm and 100 μm emission from interstellar dust. As the recent cross-correlation analysis of WHAM Hα maps with the Tenerife 10 and 15 GHz maps supports an earlier conclusion that the emission does not arise from free-free radiation, the interstellar dus...

Estimation of Asian dust effect on cloud radiation forcing

Neutron Star Envelopes and Thermal Radiation from the Magnetic Surface

The thermal structure of neutron star envelopes is discussed with emphasis on analytic results. Recent progress on the effect of chemical constitution and high magnetic fields on the opacities and the thermal structure is further reviewed in view of the application to pulsar cooling and magnetars.