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Now showing items 155-174 of 461

  • 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 ...
  • Grating-coupled surface plasmons at microwave frequencies 

    Hibbins, Alastair P.; Sambles, J. Roy; Lawrence, Christopher R. (American Institute of Physics, 1999)
    This work presents a detailed investigation of electromagnetic coupling to the surface plasmon-polariton (SPP) at microwave frequencies. We have recorded the wavelength-dependent reflectivity from a metallic sinusoidal ...
  • Gratingless enhanced microwave transmission through a subwavelength aperture in a thick metal plate 

    Hibbins, Alastair P.; Sambles, J. Roy; Lawrence, Christopher R. (American Institute of Physics, 2002)
    Remarkably enhanced transmission of microwave radiation through a single subwavelength slit in a thick metallic substrate surrounded by just a pair of parallel deep and narrow grooves is recorded. By also patterning the ...
  • Grazing-incidence iridescence from a butterfly wing 

    Lawrence, Christopher R.; Vukusic, Peter; Sambles, J. Roy (Optical Society of America, 2002)
    The Troides magellanus butterfly exhibits a specialized iridescence that is visible only when its hind wings are both illuminated and viewed at near-grazing incidence. The effect is due to the presence of a constrained ...
  • Ground-based photometry of space-based transit detections: photometric follow-up of the CoRoT mission 

    Deeg, H. J.; Gillon, M.; Shporer, A.; Rouan, D.; Stecklum, B.; Aigrain, Suzanne; Alapini, Aude; Almenara, J.-M.; Alonso, R.; Barbieri, M.; Bouchy, F.; Eislöffel, J.; Erikson, A.; Fridlund, M.; Eigmüller, P.; Handler, G.; Hatzes, A.; Kabath, P.; Lendl, M.; Mazeh, T.; Moutou, C.; Queloz, D.; Rauer, H.; Rabus, M.; Tingley, B.; Titz, R. (EDP Sciences, 2009)
    The motivation, techniques and performance of the ground-based photometric follow-up of transit detections by the CoRoT space mission are presented. Its principal raison d'être arises from the much higher spatial resolution ...
  • Ground-based secondary eclipse detection of the very-hot Jupiter OGLE-TR-56b 

    Sing, David K.; Lopez-Morales, M. (EDP Sciences, 2009)
    We report on the detection of the secondary eclipse of the very-hot Jupiter OGLE-TR-56b from combined z'-band time series photometry obtained with the VLT and Magellan telescopes. We measure a flux decrement of 0.0363 ± ...
  • GTC OSIRIS transiting exoplanet atmospheric survey: detection of potassium in HAT-P-1b from narrow-band spectrophotometry 

    Wilson, Paul A.; Sing, David K.; Nikolov, N.; Lecavelier des Etangs, A.; Pont, F.; Fortney, J.J.; Ballester, G.; Desert, J.-M.; Vidal-Madjar, A. (Oxford University Press for Royal Astronomical Society, 2015-04-15)
    We present the detection of potassium in the atmosphere of HAT-P-1b using optical transit narrow-band photometry. The results are obtained using the 10.4-m Gran Telescopio Canarias together with the OSIRIS instrument in ...
  • GTC OSIRIS transiting exoplanet atmospheric survey: Detection of sodium in XO-2b from differential long-slit spectroscopy 

    Sing, David K.; Huitson, Catherine M.; Lopez-Morales, M.; Pont, F.; Desert, J.-M.; Ehrenreich, D.; Wilson, Paul A.; Ballester, G.; Fortney, J.J.; Lecavelier des Etangs, A.; Vidal-Madjar, A. (Oxford University Press on behalf of the Royal Astronomical Society, 2012)
    We present two transits of the hot-Jupiter exoplanet XO-2b using the Gran Telescopio Canarias (GTC). The time series observations were performed using long-slit spectroscopy of XO-2 and a nearby reference star with the ...
  • 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.; Mottram, J.C.; Pezzuto, S.; Roy, A.; Rygl, K.; Schneider-Bontemps, N.; Spinoglio, L.; Testi, L.; Tothill, N.; Ward-Thompson, D.; White, G. (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 ...
  • 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. ...
  • 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 ...
  • 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 ...