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Full-Text Articles in Physical Sciences and Mathematics
First-Epoch Vlba Imaging Of 20 New Tev Blazars, B. Glenn Piner, Philip G. Edwards
First-Epoch Vlba Imaging Of 20 New Tev Blazars, B. Glenn Piner, Philip G. Edwards
Physics
We present Very Long Baseline Array (VLBA) images of 20 TeV blazars not previously well studied on the parsec scale. All 20 of these sources are high-frequency peaked BL Lac objects (HBLs). Observations were made between August and December of 2013 at a frequency of 8.4 GHz. These observations represent the first epoch of a VLBA monitoring campaign on these blazars, and they significantly increase the fraction of TeV HBLs studied with high-resolution imaging. The peak very long baseline interferometry (VLBI) flux densities of these sources range from ~10 to ~100 mJy bm–1, and parsec-scale jet structure is detected in …
Magnetically Actuated Liquid Crystals, Serkan Zorba, Mingsheng Wang, Le He, Yadong Yin
Magnetically Actuated Liquid Crystals, Serkan Zorba, Mingsheng Wang, Le He, Yadong Yin
Physics
Ferrimagnetic inorganic nanorods have been used as building blocks to construct liquid crystals with optical properties that can be instantly and reversibly controlled by manipulating the nanorod orientation using considerably weak external magnetic fields (1 mT). Under an alternating magnetic field, they exhibit an optical switching frequency above 100 Hz, which is comparable to the performance of commercial liquid crystals based on electrical switching. By combining magnetic alignment and lithography processes, it is also possible to create patterns of different polarizations in a thin composite film and control over the transmittance of light in particular areas. Developing such magnetically responsive …