Now showing items 853-872 of 1403

  • Observable signatures of wind-driven chemistry with a fully consistent three dimensional radiative hydrodynamics model of HD 209458b (article) 

    Drummond, B; Mayne, NJ; Manners, J; Carter, A; Boutle, I; Baraffe, I; Hebrard, E; Tremblin, P; Sing, D; Amundsen, D; Acreman, D (American Astronomical Society / IOP Publishing, 2018-03-15)
    We present a study of the effect of wind-driven advection on the chemical composition of hot Jupiter atmospheres using a fully-consistent 3D hydrodynamics, chemistry and radiative transfer code, the Met Office Unified ...
  • Observable signatures of wind-driven chemistry with a fully consistent three dimensional radiative hydrodynamics model of HD 209458b (dataset) 

    Drummond, Benjamin; Mayne, Nathan; Manners, James; Carter, Aarynn; Boutle, Ian; Baraffe, Isabelle; Hebrard, Eric; Tremblin, Pascal; Sing, David; Amundsen, David; Acreman, David (University of Exeter, 2018-04-24)
    We present a study of the effect of wind-driven advection on the chemical composition of hot Jupiter atmospheres using a fully-consistent 3D hydrodynamics, chemistry and radiative transfer code, the Met Office Unified Model ...
  • Observation of backflow in the switch-on dynamics of a hybrid aligned nematic 

    Jewell, Sharon A.; Sambles, J. Roy (American Institute of Physics, 2004)
    The optical convergent-beam technique is used to measure, in 0.3 ms steps, the response of the director in a 4.6-µm-thick ZLI-2293 filled hybrid aligned nematic cell when a 10 kHz, 7 Vrms ac voltage is applied to the cell. ...
  • Observation of ferromagnetic resonance in the time domain 

    Hicken, R.J.; Wu, J. (American Institute of Physics, 1999)
    Optical pump–probe spectroscopy has been used to observe damped ferromagnetic resonance (FMR) oscillations in thin film Fe samples. The FMR was pumped by magnetic field pulses generated by an optically triggered photoconductive ...
  • Observation of negative-frequency waves in a water tank: A classical analogue to the Hawking effect? 

    Rousseaux, Germain; Mathis, Christian; Maissa, Philippe; Philbin, Thomas G.; Leonhardt, Ulf (Institute of Physics, 2008)
    The conversion of positive-frequency waves into negative-frequency waves at the event horizon is the mechanism at the heart of the Hawking radiation of black holes. In black-hole analogues, horizons are formed for waves ...
  • Observation of noise correlated by the Hawking effect in a water tank 

    Euvé, L-P; Michel, F; Parentani, R; Philbin, TG; Rousseaux, G (merican Physical Society, 2016-09-13)
    We measured the power spectrum and two-point correlation function for the randomly fluctuating free surface on the downstream side of a stationary flow with a maximum Froude number $F_{\rm max} \approx 0.85$ reached above ...
  • Observation of T2-like coherent optical phonons in epitaxial Ge2Sb2Te5/GaSb(001) films (dataset) 

    Shalini, Ashawaraya; Liu, Y.; Al-Jarah, Uday Ali Sabeeh; Srivastava, G.P.; Wright, C. David; Katmis, F.; Braun, W.; Hicken, R.J. (University of Exeter, 2013-10-04)
    The phonon spectrum of Ge2Sb2Te5 is a signature of its crystallographic structure and underlies the phase transition process used in memory applications. Epitaxial materials allow coherent optical phonons to be studied in ...
  • Observation of T2-like coherent optical phonons in epitaxial Ge2Sb2Te5/GaSb(001) films (journal article) 

    Shalini, Ashawaraya; Liu, Y.; Al-Jarah, Uday Ali Sabeeh; Srivastava, G.P.; Wright, C. David; Katmis, F.; Braun, W.; Hicken, R.J. (Nature Publishing Group, 2013-10-16)
    The phonon spectrum of Ge2Sb2Te5 is a signature of its crystallographic structure and underlies the phase transition process used in memory applications. Epitaxial materials allow coherent optical phonons to be studied in ...
  • Observation of the full 12-hour-long transit of the exoplanet HD80606b: Warm-Spitzer photometry and SOPHIE spectroscopy 

    Hebrard, G.; Desert, J.-M.; Diaz, R.F.; Boisse, I.; Bouchy, F.; Lecavelier des Etangs, A.; Moutou, C.; Ehrenreich, D.; Arnold, L.; Bonfils, X.; Delfosse, X.; Desort, M.; Eggenberger, A.; Forveille, T.; Gregorio, J.; Lagrange, A.-M.; Lovis, C.; Pepe, F.; Perrier, C.; Pont, F.; Queloz, D.; Santerne, A.; Santos, N.C.; Segransan, D.; Sing, David K.; Udry, S.; Vidal-Madjar, A. (EDP Sciences for European Southern Observatory (ESO), 2010)
    We present new observations of a transit of the 111.4-day-period exoplanet HD 80606b. Due to this long orbital period and to the orientation of the eccentric orbit (e = 0.9), HD 80606b's transits last for about 12 hours. ...
  • Observation of thickness dependence of magnetic surface anisotropy in ultrathin amorphous films. 

    Hicken, R.J.; Rado, G.T.; Xiao, G.; Chien, C.L. (American Physical Society, 1990)
    Ferromagnetic resonance (FMR) and SQUID magnetometry measurements have been made on multilayers of amorphous Fe70B30/Ag. The dependence of the magnetic surface anisotropy constant Ks on the magnetic layer thickness 2L has ...
  • Observation of vortex dynamics in arrays of nanomagnets 

    Yu, W.; Keatley, Paul Steven; Gangmei, Prim; Marcham, Max K.; Loughran, T. H. J.; Hicken, R.J.; Cavill, Stuart A.; van der Laan, Gerrit; Childress, J.R.; Katine, J.A. (American Physical Society, 2015-05-22)
    Vortex dynamics within arrays of square ferromagnetic nanoelements have been studied by time-resolved scanningKerr microscopy (TRSKM),while x-ray photoemission electronmicroscopy has been used to investigate the equilibrium ...
  • An observational method to measure the relative fractions of solenoidal and compressible modes in interstellar clouds 

    Brunt, CM; Federrath, C (Oxford University Press (OUP) / Royal Astronomical Society, 2014-06-16)
    We introduce a new method for observationally estimating the fraction of momentum density (ρv) power contained in solenoidal modes (for which ∇ · ρv = 0) in molecular clouds. The method is successfully tested with numerical ...
  • An Observational Perspective of Transitional Disks 

    Espaillat, C; Muzerolle, J; Najita, J; Andrews, S; Zhu, Z; Calvet, Nuria; Kraus, Stefan; Hashimoto, J; Kraus, Adam; D Alessio, P (arXiv.org, 2014-02-27)
    Transitional disks are objects whose inner disk regions have undergone substantial clearing. The Spitzer Space Telescope produced detailed spectral energy distributions (SEDs) of transitional disks that allowed us to infer ...
  • Observed luminosity spread in young clusters and Fu Ori stars: a unified picture 

    Baraffe, I.; Vorobyov, Eduard I.; Chabrier, G. (American Astronomical Society, 2012)
    The idea that non-steady accretion during the embedded phase of protostar evolution can produce the observed luminosity spread in the Herzsprung–Russell diagram (HRD) of young clusters has recently been called into question. ...
  • Observing a quantum Maxwell demon at work 

    Cotteta, N; Jezouina, S; Landry, B; Campagne-Ibarcqa, P; Ficheuxa, Q; Anders, J; Auffèvesc, A; Azouitd, R; Rouchond, P; Huarda, B (National Academy of Sciences, 2017-07-03)
    In apparent contradiction to the laws of thermodynamics, Maxwell’s demon is able to cyclically extract work from a system in contact with a thermal bath exploiting the information about its microstate. The resolution ...
  • OGLE-2005-BLG-018: Characterization of Full Physical and Orbital Parameters of a Gravitational Binary Lens 

    Shin, I-G; Udalski, A; Han, C; Gould, A; Dominik, M; Fouque, P; Kubiak, M; Szymanski, MK; Pietrzynki, G; Soszynski, I; Ulaczyk, K; Wyrzykowski, L; DePoy, DL; Dong, S; Gaudi, BS; Lee, C-U; Park, B-G; Pogge, RW; Albrow, MD; Allan, A; Beaulieu, JP; Bennett, DP; Bode, M; Bramich, DM; Brillant, S; Burgadorf, M; Caldwell, JAR; Calitz, H; Cassan, A; Cook, KH; Corrales, E; Coutures, C; Desort, N; Dieters, S; Prester, DD; Donatowicz, J; Fraser, SN; Greenhill, J; Hill, K; Hoffman, M; Horne, K; Jorgensen, UG; Kane, SR; Kubas, D; Marquette, JB; Martin, R; Meintjes, P; Menzies, J; Mottram, C; Naylor, T; Pollard, KR; Sahu, KC; Snodgrass, C; Steele, I; Vinter, C; Wambsganss, J; Williams, A; Woller, K (American Astronomical Society / IOP Publishing, 2011-06-20)
    We present the analysis result of a gravitational binary-lensing event OGLE-2005-BLG-018. The light curve of the event is characterized by 2 adjacent strong features and a single weak feature separated from the strong ...
  • Omnidirectional surface wave cloak using an isotropic homogeneous dielectric coating 

    Mitchell-Thomas, RC; Quevedo-Teruel, O; Sambles, JR; Hibbins, AP (Nature Publishing Group, 2016)
    The field of transformation optics owes a lot of its fame to the concept of cloaking. While some experimental progress has been made towards free-space cloaking in three dimensions, the material properties required are ...
  • Omnidirectional surface wave cloak using an isotropic homogeneous dielectric coating 

    Mitchell-Thomas, RC; Quevedo-Teruel, O; Sambles, JR; Hibbins, AP (University of Exeter, 2016-07-21)
    Datasets for Fig 4
  • On a solution of the Schrödinger equation with a hyperbolic double-well potential 

    Downing, C.A. (American Institute of Physics (AIP), 2013-07-01)
    We report a solution of the one-dimensional Schrödinger equation with a hyperbolic double-well confining potential via a transformation to the so-called confluent Heun equation. We discuss the requirements on the parameters ...
  • On close-in magnetized star-planet interactions 

    Strugarek, Antoine; Brun, Allan Sacha; Matt, Sean P. (French Society of Astronomy and Astrophysics, 2012)
    We present 2D magnetohydrodynamic simulations performed with the PLUTO code to model magnetized star-planet interactions. We study two simple scenarios of magnetized star-planet interactions: the unipolar and dipolar ...