Now showing items 478-497 of 1419

  • A gamma-ray burst at a redshift of z approximate to 8.2 

    Tanvir, N.R.; Fox, D.B.; Levan, A.J.; Berger, E.; Wiersema, K.; Fynbo, J.P.U.; Cucchiara, A.; Kruehler, T.; Gehrels, N.; Bloom, J.S.; Greiner, J.; Evans, P.A.; Rol, E.; Olivares, F.; Hjorth, J.; Jakobsson, P.; Farihi, J.; Willingale, R.; Starling, R.L.C.; Cenko, S.B.; Perley, D.; Maund, J.R.; Duke, J.; Wijers, R.A.M.J.; Adamson, A.J.; Allan, Alasdair; Bremer, M.N.; Burrows, D.N.; Castro-Tirado, A.J.; Cavanagh, B.; de Ugarte Postigo, A.; Dopita, M.A.; Fatkhullin, T.A.; Fruchter, A.S.; Foley, R.J.; Gorosabel, J.; Kennea, J.; Kerr, T.; Klose, S.; Krimm, H.A.; Komarova, V.N.; Kulkarni, S.R.; Moskvitin, A.S.; Mundell, C.G.; Naylor, Tim; Page, K.; Penprase, B.E.; Perri, M.; Podsiadlowski, P.; Roth, K.; Rutledge, R.E.; Sakamoto, T.; Schady, P.; Schmidt, B.P.; Soderberg, A.M.; Sollerman, J.; Stephens, A.W.; Stratta, G.; Ukwatta, T.N.; Watson, D.; Westra, E.; Wold, T.; Wolf, C. (Nature Publishing Group, 2009)
  • Gapless states in microwave artificial graphene (article) 

    Dautova, YN; Shytov, AV; Hooper, IR; Sambles, JR; Hibbins, AP (AIP Publishing, 2017-06-30)
    A microwave analogue of graphene comprised of cylindrical metallic rods arranged in a honeycomb array is fabricated. Dispersion curves of the bound electromagnetic eigenmodes of the system were experimentally determined ...
  • Gapless states in microwave artificial graphene (dataset) 

    Dautova, J; Shytov, A; Hooper, IR; Sambles, JR; Hibbins, AP (University of Exeter, 2017-06-30)
  • Gas accretion on to planetary cores: Three-dimensional self-gravitating radiation hydrodynamical calculations 

    Ayliffe, Benjamin A.; Bate, Matthew R. (Oxford University Press / Royal Astronomical Society, 2009)
    We present results from three-dimensional, self-gravitating radiation hydrodynamical models of gas accretion by planetary cores. In some cases, the accretion flow is resolved down to the surface of the solid core – the ...
  • Gas distribution, kinematics, and excitation structure in the disks around the Classical Be Stars β Canis Minoris and ζ Tauri 

    Kraus, S; Monnier, JD; Che, X; Schaefer, G; Touhami, Y; Gies, DR; Aufdenberg, JP; Baron, F; Thureau, N; ten Brummelaar, TA; McAlister, HA; Turner, NH; Sturmann, J; Sturmann, L (American Astronomical Society / IOP Publishing, 2011-12-08)
    Using CHARA and VLTI near-infrared spectro-interferometry with hectometric baseline lengths (up to 330 m) and with high spectral resolution (up to λ/Δλ = 12, 000), we studied the gas distribution and kinematics around two ...
  • Gas dynamics in the inner few AU around the Herbig B[e] star MWC297: Indications of a disk wind from kinematic modeling and velocity-resolved interferometric imaging 

    Hone, E; Kraus, S; Kreplin, A; Hofmann, K-H; Weigelt, G; Harries, T; Kluska, J (EDP Sciences for European Southern Observatory (ESO), 2017-09-15)
    We present near-infrared AMBER (R = 12, 000) and CRIRES (R = 100, 000) observations of the Herbig B[e] star MWC297 in the hydrogen Br-gamma-line. Using the VLTI unit telescopes, we obtained a uv-coverage suitable for ...
  • Gemini planet imager observational calibrations V: Astrometry and distortion 

    Konopacky, QM; Thomas, SJ; MacIntosh, BA; Dillon, D; Sadakuni, N; Maire, J; Fitzgerald, M; Hinkley, S; Kalas, P; Esposito, T; Marois, C; Ingraham, PJ; Marchis, F; Perrin, MD; Graham, JR; Wang, JJ; De Rosa, RJ; Morzinski, K; Pueyo, L; Chilcote, JK; Larkin, JE; Fabrycky, D; Goodsell, SJ; Oppenheimer, BR; Patience, J; Saddlemyer, L; Sivaramakrishnan, A (Society of Photo-optical Instrumentation Engineers (SPIE), 2014-06-22)
    We present the results of both laboratory and on sky astrometric characterization of the Gemini Planet Imager (GPI). This characterization includes measurement of the pixel scale∗ of the integral field spectrograph (IFS), ...
  • General relativity in electrical engineering 

    Leonhardt, Ulf; Philbin, Thomas G. (Institute of Physics, 2006)
    In electrical engineering metamaterials have been developed that offer unprecedented control over electromagnetic fields. Here we show that general relativity lends the theoretical tools for designing devices made of such ...
  • Generalized coherent states 

    Philbin, TG (American Association of Physics Teachers, 2014)
    In the coherent state of the harmonic oscillator, the probability density is that of the ground state subjected to an oscillation along a classical trajectory. Senitzky and others pointed out that there are states of the ...
  • Generation of Propagating Spin Waves from Edges of Magnetic Nanostructures Pumped by Uniform Microwave Magnetic Field 

    Davies, CS; Kruglyak, VV (Institute of Electrical and Electronics Engineers (IEEE), 2016-01-12)
    Thin-film patterned magnetic nanostructures are widely employed within perceived magnonic device architectures to guide and/or manipulate spin waves for data processing and communication purposes. Here, using micromagnetic ...
  • Generation of propagating spin waves from regions of increased dynamic demagnetising field near magnetic antidots 

    Davies, CS; Sadovnikov, AV; Grishin, SV; Sharaevskii, YP; Nikitov, SA; Kruglyak, VV (American Institute of Physics (AIP), 2015-10-20)
    We have used Brillouin Light Scattering and micromagnetic simulations to demonstrate a point-like source of spin waves created by the inherently nonuniform internal magnetic field in the vicinity of an isolated antidot ...
  • A geometrical 1% distance to the short-period binary Cepheid V1334 Cygni 

    Gallenne, A; Kervella, P; Evans, NR; Proffitt, CR; Monnier, JD; Merand, A; Nelan, E; Winston, E; Pietrzynski, G; Schaefer, G; Gieren, W; Anderson, RI; Borgniet, S; Kraus, S; Roettenbacher, RM; Baron, F; Pilecki, B; Taormina, M; Graczyk, D; Mowlavi, N; Eyer, L (American Astronomical Society / IOP Publishing, 2018)
    Cepheid stars play a considerable role as extragalactic distances indicators, thanks to the simple empirical relation between their pulsation period and their luminosity. They overlap with that of secondary distance ...
  • A giant comet-like cloud of hydrogen escaping the warm Neptune-mass exoplanet GJ 436b 

    Ehrenreich, D.; Bourrier, V.; Wheatley, P.J.; Lecavelier des Etangs, A.; Hebrard, G.; Udry, S.; Bonfils, X.; Delfosse, X.; Desert, J.-M.; Sing, David K.; Vidal-Madjar, A. (Nature Publishing Group, 2015-06-25)
    Exoplanets orbiting close to their parent stars may lose some fraction of their atmospheres because of the extreme irradiation. Atmospheric mass loss primarily affects low-mass exoplanets, leading to the suggestion that ...
  • Glitter-like iridescence within the bacteroidetes especially Cellulophaga spp.: optical properties and correlation with gliding motility. 

    Kientz, B; Ducret, A; Luke, S; Vukusic, P; Mignot, T; Rosenfeld, E (Public Library of Science, 2012)
    Iridescence results from structures that generate color. Iridescence of bacterial colonies has recently been described and illustrated. The glitter-like iridescence class, created especially for a few strains of Cellulophaga ...
  • Global-scale Magnetism (and Cycles) in Dynamo Simulations of Stellar Convection Zones 

    Brown, Benjamin P.; Browning, Matthew K.; Brun, Allan Sacha; Miesch, Mark S.; Toomre, Juri (Astronomical Society of the Pacific, 2011-01)
    Young solar-type stars rotate rapidly and are very magnetically active. The magnetic fields at their surfaces likely originate in their convective envelopes where convection and rotation can drive strong dynamo action. ...
  • Graded-index magnonics 

    Davies, CS; Kruglyak, VV (American Institute of Physics, 2015-10-01)
    © 2015 AIP Publishing LLC. The wave solutions of the Landau-Lifshitz equation (spin waves) are characterized by some of the most complex and peculiar dispersion relations among all waves. For example, the spin-wave ...
  • Graded-index magnonics 

    Davies, Carl S.; Kruglyak, V.V. (American Institute of Physics (AIP), 2015-08-25)
    The wave solutions of the Landau–Lifshitz equation (spin waves) are characterized by some of the most complex and peculiar dispersion relations among all waves. For example, the spin-wave (“magnonic”) dispersion can range ...
  • Grain boundaries in granular materials-A fundamental limit for thermal stability 

    Saharan, L; Morrison, C; Ikeda, Y; Takano, K; Miles, JJ; Thomson, T; Schrefl, T; Hrkac, G (American Institute of Physics (AIP), 2013)
    We show that thermal-stability and the associated switching field in well segregated, nanoscale granular materials is explained by grain boundary and interface effects. Grain boundaries pose a fundamental limit on scaling ...
  • Grain-size dependent demagnetizing factors in permanent magnets 

    Bance, S; Seebacher, B; Schrefl, T; Exl, L; Winklhofer, M; Hrkac, G; Zimanyi, G; Shoji, T; Yano, M; Sakuma, N; Ito, M; Kato, A; Manabe, A (American Institute of Physics (AIP), 2014)
    The coercive field of permanent magnets decreases with increasing grain size. The grain size dependence of coercivity is explained by a size dependent demagnetizing factor. In Dy free Nd$_2$Fe$_{14}$B magnets the size ...
  • Gran Telescopio Canarias OSIRIS transiting exoplanet atmospheric survey: Detection of potassium in XO-2b from narrowband spectrophotometry 

    Sing, David K.; Desert, J.-M.; Fortney, J.J.; Lecavelier des Etangs, A.; Ballester, G.; Cepa, J.; Ehrenreich, D.; Lopez-Morales, M.; Pont, F.; Shabram, M.; Vidal-Madjar, A. (EDP Sciences, 2011)
    We present Gran Telescopio Canarias (GTC) optical transit narrowband photometry of the hot-Jupiter exoplanet XO-2b using the OSIRIS instrument. This unique instrument has the capabilities to deliver high-cadence narrowband ...