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Full-Text Articles in Physical Sciences and Mathematics
Molecular Gas And Star Formation In The Cartwheel, James L. Higdon, Sarah J.U. Higdon, Sergio Martín Ruiz, Richard J. Rand
Molecular Gas And Star Formation In The Cartwheel, James L. Higdon, Sarah J.U. Higdon, Sergio Martín Ruiz, Richard J. Rand
Department of Physics and Astronomy Faculty Publications
Atacama Large Millimeter/submillimeter Array 12CO(J = 1–0) observations are used to study the cold molecular ISM of the Cartwheel ring galaxy and its relation to H i and massive star formation (SF). CO moment maps find (2.69 ± 0.05) × 109 M⊙ of H2 associated with the inner ring (72%) and nucleus (28%) for a Galactic ICO-to- conversion factor (αCO). The spokes and disk are not detected. Analysis of the inner ring's CO kinematics shows it to be expanding (Vexp = 68.9 ± 4.9 km s−1), implying an ≈70 Myr age. Stack averaging …
Hyperbolic Resonances Of Metasurface Cavities, David Keene, Maxim Durach
Hyperbolic Resonances Of Metasurface Cavities, David Keene, Maxim Durach
Department of Physics and Astronomy Faculty Publications
We propose a new class of optical resonator structures featuring one or two metasurface reflectors or metacavities and predict that such resonators support novel hyperbolic resonances. As an example of such resonances we introduce hyperbolic Tamm plasmons (HTPs) and hyperbolic Fabry-Perot resonances (HFPs). The hyperbolic optical modes feature low-loss incident power re-distribution over TM and TE polarization output channels, clover-leaf anisotropic dispersion, and other unique properties which are tunable and are useful for multiple applications.
Surface Structure And Surface Kinetics Of Inn Grown By Plasma-Assisted Atomic Layer Epitaxy: A Hreels Study, Ananta Acharya, Brian D. Thoms, Neeraj Nepal, Charles R. Eddy Jr.
Surface Structure And Surface Kinetics Of Inn Grown By Plasma-Assisted Atomic Layer Epitaxy: A Hreels Study, Ananta Acharya, Brian D. Thoms, Neeraj Nepal, Charles R. Eddy Jr.
Department of Physics and Astronomy Faculty Publications
The surface bonding configuration and kinetics of hydrogen desorption from InN grown by plasma-assisted atomic layer epitaxy have been investigated. High resolution electron energy loss spectra exhibited loss peaks assigned to a Fuchs–Kliewer surface phonon, N-N and N-H surface species. The surface N-N vibrations are attributed to surface defects. The observation of N-H but no In-Hsurface species suggested N-terminated InN. Isothermal desorption data were best fit by the first-order desorption kinetics with an activation energy of (0.88 ± 0.06) eV and pre-exponential factor of (1.5 ± 0.5) × 105 s−1.