Now showing items 202-221 of 580

  • Hawking radiation and the boomerang behaviour of massive modes near a horizon 

    Jannes, Gil; Maissa, Philippe; Philbin, Thomas G.; Rousseaux, Germain (American Physical Society, 2011)
    We discuss the behaviour of massive modes near a horizon based on a study of the dispersion relation and wave packet simulations of the Klein-Gordon equation. We point out an apparent paradox between two (in principle ...
  • Hawking tunneling and boomerang behaviour of massive particles with E < m 

    Jannes, Gil; Philbin, Thomas G.; Rousseaux, Germain (American Institute of Physics, 2012)
    Massive particles are radiated from black holes through the Hawking mechanism together with the more familiar radiation of massless particles. For E ≥ m, the emission rate is identical to the massless case. But E < m ...
  • Heavily loaded ferrite-polymer composites to produce high refractive index materials at centimetre wavelengths 

    Parke, L.; Hooper, Ian R.; Hicken, R.J.; Dancer, C.E.J.; Grant, P.S.; Youngs, I.J.; Sambles, J. Roy; Hibbins, Alastair P. (American Institute of Physics (AIP), 2013)
    A cold-pressing technique has been developed for fabricating composites composed of a polytetrafluoroethylene-polymer matrix and a wide range of volume-fractions of MnZn-ferrite filler (0%–80%). The electromagnetic properties ...
  • The Herschel and JCMT Gould belt surveys: Constraining dust properties in the Perseus B1 clump with PACS, SPIRE, and SCUBA-2 

    Sadavoy, S.I.; Di Francesco, J.; Johnstone, D.; Currie, M.J.; Drabek, E.; Hatchell, Jennifer; Nutter, D.; André, P.; Arzoumanian, D.; Benedettini, M.; Bernard, J-P.; Duarte-Cabral, A.; Fallscheer, C.; Friesen, R.; Greaves, J.; Hennemann, M.; Hill, T.; Jenness, T.; Könyves, V.; Matthews, B.C.; Mottram, J.C.; Pezzuto, S.; Roy, A.; Rygl, K.; Schneider-Bontemps, N.; Spinoglio, L.; Testi, L.; Tothill, N.; Ward-Thompson, D.; White, G.J. (American Astronomical Society / IOP Publishing, 2013)
    We present Herschel observations from the Herschel Gould Belt Survey and SCUBA-2 science verification observations from the JCMT Gould Belt Survey of the B1 clump in the Perseus molecular cloud. We determined the dust ...
  • HH 222: A Giant Herbig-Haro Flow from the Quadruple System V380 Ori 

    Reipurth, B; Bally, J; Aspin, C; Connelley, MS; Geballe, TR; Kraus, Stefan; Appenzeller, I; Burgasser, A (American Astronomical Society, 2013-10-07)
    HH 222 is a giant shocked region in the L1641 cloud, and is popularly known as the Orion Streamers or "the waterfall" on account of its unusual structure. At the center of these streamers are two infrared sources coincident ...
  • High-frequency dielectric relaxation of liquid crystals: THz time-domain spectroscopy of liquid crystal colloids 

    Oh-e, Masahito; Yokoyama, Hiroshi; Koeberg, Mattijs; Hendry, Euan; Bonn, Mischa (Optical Society of America, 2006)
    Terahertz time-domain spectroscopy has been used to study the dielectric relaxation of pure 4’–n-pentyl–4–cyanobiphenyl (5CB) liquid crystal (LC) and its mixtures with 10 µm SiO2 particles in the frequency range 0.2–2 THz. ...
  • Highly tunable hybrid metamaterials employing split-ring resonators strongly coupled to graphene surface plasmons. 

    Liu, PQ; Luxmoore, Isaac John; Mikhailov, SA; Savostianova, NA; Valmorra, F; Faist, J; Nash, Geoffrey R. (Nature Publishing Group, 2015-11-20)
    Metamaterials and plasmonics are powerful tools for unconventional manipulation and harnessing of light. Metamaterials can be engineered to possess intriguing properties lacking in natural materials, such as negative ...
  • Hint of a transiting extended atmosphere on 55 Cancri b 

    Ehrenreich, D.; Bourrier, V.; Bonfils, X.; Lecavelier des Etangs, A.; Hebrard, G.; Sing, David K.; Wheatley, P.J.; Vidal-Madjar, A.; Delfosse, X.; Udry, S.; Forveille, T.; Moutou, C. (EDP Sciences for European Southern Observatory (ESO), 2012)
    The naked-eye star 55 Cancri hosts a planetary system with five known planets, including a hot super-Earth (55 Cnc e) extremely close to its star and a farther out giant planet (55 Cnc b), found in milder irradiation ...
  • Holographic imaging of interlayer coupling in Co/Pt/NiFe 

    Duckworth, Thomas A.; Ogrin, Feodor Y.; Beutier, Guillaume; Dhesi, Sarnjeet S.; Cavill, Stuart A.; Langridge, Sean; Whiteside, Amy; Moore, Thomas; Dupraz, Maxime; Yakhou, Flora; van der Laan, Gerrit (Institute of Physics, 2013)
    We present a method to determine the magnetic configuration of an in-plane magnetized permalloy layer using Fourier transform holography with extended references in an off-normal geometry. We use a narrow slit as an extended ...
  • Horizon effects with surface waves on moving water 

    Rousseaux, Germain; Maissa, Philippe; Mathis, Christian; Coullet, Pierre; Philbin, Thomas G.; Leonhardt, Ulf (Institute of Physics, 2010)
    Surface waves on a stationary flow of water are considered, in a linear model that includes the surface tension of the fluid. The resulting gravity-capillary waves experience a rich array of horizon effects when propagating ...
  • Hot phonon decay in supported and suspended exfoliated graphene 

    Hale, Peter J.; Hornett, Samuel M.; Moger, Julian; Horsell, D.W.; Hendry, Euan (American Physical Society, 2011-03-14)
    Near infrared pump-probe spectroscopy has been used to measure the ultrafast dynamics of photoexcited charge carriers in monolayer and multilayer graphene. We observe two decay processes occurring on 100 fs and 2 ps ...
  • HST hot Jupiter transmission spectral survey: detection of water in HAT-P-1b from WFC3 near-IR spatial scan observations 

    Wakeford, H.R.; Sing, David K.; Deming, D.; Gibson, N.; Fortney, J.J.; Burrows, A.S.; Ballester, G.; Nikolov, N.; Aigrain, Suzanne; Henry, G.; Knutson, H.; Lecavelier des Etangs, A.; Pont, F.; Showman, A.P.; Vidal-Madjar, A.; Zahnle, K. (Oxford University Press on behalf of the Royal Astronomical Society, 2013)
    We present Hubble Space Telescope near-infrared transmission spectroscopy of the transiting hot-Jupiter HAT-P-1b. We observed one transit with Wide Field Camera 3 using the G141 low-resolution grism to cover the wavelength ...
  • HST hot-Jupiter transmission spectral survey: detection of potassium in WASP-31b along with a cloud deck and Rayleigh scattering 

    Sing, David K.; Wakeford, H.R.; Showman, A.P.; Nikolov, N.; Fortney, J.J.; Burrows, A.S.; Ballester, G.; Deming, D.; Aigrain, Suzanne; Desert, J.-M.; Gibson, N.; Henry, G.; Knutson, H.; Lecavelier des Etangs, A.; Pont, F.; Vidal-Madjar, A.; Williamson, M.W.; Wilson, Paul A. (Oxford University Press on behalf of the Royal Astronomical Society, 2015)
    We present Hubble Space Telescope optical and near-IR transmission spectra of the transiting hot-Jupiter WASP-31b. The spectrum covers 0.3–1.7 μm at a resolution R ∼ 70, which we combine with Spitzer photometry to cover ...
  • HST hot-Jupiter transmission spectral survey: Evidence for aerosols and lack of TiO in the atmosphere of WASP-12b 

    Sing, David K.; Lecavelier des Etangs, A.; Fortney, J.J.; Burrows, A.S.; Pont, F.; Wakeford, H.R.; Ballester, G.; Nikolov, N.; Henry, G.; Aigrain, Suzanne; Deming, D.; Evans, T.M.; Gibson, N.; Huitson, Catherine M.; Knutson, H.; Showman, A.P.; Vidal-Madjar, A.; Wilson, Paul A.; Williamson, M.H.; Zahnle, K. (Oxford University Press on behalf of the Royal Astronomical Society, 2013)
    We present Hubble Space Telescope (HST) optical transmission spectra of the transiting hot-Jupiter WASP-12b, taken with the Space Telescope Imaging Spectrograph instrument. The resulting spectra cover the range 2900–10 300 Å ...
  • HST hot-Jupiter transmission spectral survey: Haze in the atmosphere of WASP-6b 

    Nikolov, N.; Sing, David K.; Burrows, A.S.; Fortney, J.J.; Henry, G.; Pont, F.; Ballester, G.; Aigrain, Suzanne; Wilson, Paul A.; Huitson, Catherine M.; Gibson, N.; Desert, J.-M.; Lecavelier des Etangs, A.; Showman, A.P.; Vidal-Madjar, A.; Wakeford, H.R.; Zahnle, K. (Oxford University Press on behalf of the Royal Astronomical Society, 2014)
    We report Hubble Space Telescope optical to near-infrared transmission spectroscopy of the hot-Jupiter WASP-6b, measured with the Space Telescope Imaging Spectrograph and Spitzer's InfraRed Array Camera. The resulting ...
  • An HST optical-to-near-IR transmission spectrum of the hot Jupiter WASP-19b: detection of atmospheric water and likely absence of TiO 

    Huitson, Catherine M.; Sing, David K.; Pont, F.; Fortney, J.J.; Burrows, A.S.; Wilson, Paul A.; Ballester, G.; Nikolov, N.; Gibson, N.; Deming, D.; Aigrain, Suzanne; Evans, T.M.; Henry, G.; Lecavelier des Etangs, A.; Showman, A.P.; Vidal-Madjar, A.; Zahnle, K. (Oxford University Press / Royal Astronomical Society, 2013)
    We measure the transmission spectrum of WASP-19b from three transits using low-resolution optical spectroscopy from the Hubble Space Telescope (HST) Space Telescope Imaging Spectrograph (STIS). The STIS spectra cover a ...
  • Hubble Space Telescope hot Jupiter transmission spectral survey: A detection of Na and strong optical absorption in HAT-P-1b 

    Nikolov, N.; Sing, David K.; Pont, F.; Burrows, A.S.; Fortney, J.J.; Ballester, G.; Evans, T.M.; Huitson, Catherine M.; Wakeford, H.R.; Wilson, Paul A.; Aigrain, Suzanne; Deming, D.; Gibson, N.; Henry, G.; Knutson, H.; Lecavelier des Etangs, A.; Showman, A.P.; Vidal-Madjar, A.; Zahnle, K. (Oxford University Press / Royal Astronomical Society, 2013)
    We present an optical to near-infrared transmission spectrum of the hot Jupiter HAT-P-1b, based on Hubble Space Telescope observations, covering the spectral regime from 0.29 to 1.027 μm with Space Telescope Imaging ...
  • Hubble Space Telescope STIS optical transit transmission spectra of the hot Jupiter HD 209458b 

    Sing, David K.; Vidal-Madjar, A.; Desert, J.-M.; Lecavelier des Etangs, A.; Ballester, G. (American Astronomical Society / IOP Publishing, 2008)
    We present the transmission spectra of the hot Jupiter HD 209458b taken with the Space Telescope Imaging Spectrograph aboard the Hubble Space Telescope. Our analysis combines data at two resolutions and applies a complete ...
  • Hubble Space Telescope transmission spectroscopy of the exoplanet HD 189733b: high-altitude atmospheric haze in the optical and near-ultraviolet with STIS 

    Sing, David K.; Pont, F.; Aigrain, Suzanne; Charbonneau, D.; Desert, J.-M.; Gibson, N.; Gilliland, R.L.; Hayek, W.; Henry, G.; Knutson, H.; Lecavelier des Etangs, A.; Mazeh, T.; Shporer, A. (Oxford University Press / Royal Astronomical Society, 2011)
    We present Hubble Space Telescope (HST) optical and near-ultraviolet transmission spectra of the transiting hot Jupiter HD 189733b, taken with the repaired Space Telescope Imaging Spectrograph (STIS) instrument. The resulting ...
  • Illusions and cloaks for surface waves 

    McManus, TM; Valiente-Kroon, JA; Horsley, S.A.R; Hao, Y (Nature Publishing Group, 2014-08-22)
    Ever since the inception of Transformation Optics (TO), new and exciting ideas have been proposed in the field of electromagnetics and the theory has been modified to work in such fields as acoustics and thermodynamics. ...