We study the angular power spectra of the polarized component of the Galactic synchrotron emission in the 28–deg Test Region of the Southern Galactic Plane Survey at 1.4 GHz. These data were obtained by the Australia Telescope Compact Array and allow us to investigate angular power spectra down to arcminute scales. We find that, at this frequency, the polarization spectra for E– and B–modes see...

Broad-band polarimetry and spectropolarimetry of a complete sample of 18 luminous AGNs (Lbol ≥ 10 L⊙), selected in an orientation-independent way by warm infrared flux, shows that an orientation – dust-covering Unified Scheme like that successfully explored for the lower luminosity Seyfert galaxies applies to the luminous QSOs. Broad emission lines and continuum seen in polarized (scattered) li...

We report the discovery of significant linear polarization (p > 1%) in the hyperluminous z = 3.87 BALQSO APM 08279+5255. The polarization spectrum is complex, with properties similar to those of other, lower redshift but more highly polarized BALQSOs. The resonance emission lines are unpolarized while the absorption troughs show polarization similar to or higher than the continuum. In particula...

The spin degree of freedom in quantum phases of the second Landau level is probed by resonant light scattering. The long wavelength spin wave, which monitors the degree of spin polarization, is at the Zeeman energy in the fully spin-polarized state at ν = 3. At lower filling factors, the intensity of the Zeeman mode collapses, indicating loss of polarization. A novel continuum of low-lying exci...

We have measured absolute fully differential cross sections for photo double ionization of helium by circularly and linearly polarized light 20 eV above threshold. The data have been obtained by measuring in coincidence the momentum vector of the He2+ ion and one of the electrons, covering 4π solid angle for all particles. We give an overview over the momentum distribution in the three-body con...

Diversity and plasticity are hallmarks of cells of the monocyte-macrophage lineage. In response to IFNs, Toll-like receptor engagement, or IL-4/IL-13 signaling, macrophages undergo M1 (classical) or M2 (alternative) activation, which represent extremes of a continuum in a universe of activation states. Progress has now been made in defining the signaling pathways, transcriptional networks, and ...

The carbon nanotube photoexcitation spectrum is dominated by excitonic transitions, rather than interband transitions between continuum states. There are eight distinct excitonic transitions (four singlet and four triplet), each with two-fold degeneracy. Because the triplet excitons are spin polarized with electron and hole spins both pointing in the same direction, they are optically inactive,...

Electronic (β(e)) and vibrational (β(v)) first-order hyperpolarizabilities of uracil were determined in gas and water solution using the Coulomb-attenuating Density Functional Theory level with the Dunning's correlation-consistent aug-cc-pVDZ basis set. Frequency-dependent β(e) values were computed for the Second Harmonic Generation (SHG) and Electric Optical Pockels Effect (EOPE) nonlinear opt...

We devised and built a versatile facility for the calibration of the next generation X-ray polarimeters with unpolarized and polarized radiation. The former is produced at 5.9 keV by means of a Fe radioactive source or by X-ray tubes, while the latter is obtained by Bragg diffraction at nearly 45 degrees. Crystals tuned with the emission lines of X-ray tubes with molybdenum, rhodium, calcium an...

We present Keck spectropolarimetry of the highly polarized radio-loud quasar 3CR68.1 (z = 1.228, V = 19). The polarization increases from 5% in the red (4000Å rest-frame) to >10% in the blue (1900Å rest-frame). The broad emission lines are polarized the same as the continuum, which shows that 3CR68.1 is not a blazar as it has sometimes been regarded in the past. We also present measurements of ...