Now showing items 306-325 of 866

  • The H-band Emitting Region of the Luminous Blue Variable P Cygni: Spectrophotometry and Interferometry of the Wind 

    Richardson, ND; Schaefer, GH; Gies, DR; Chesneau, O; Monnier, JD; Baron, F; Che, X; Parks, JR; Matson, RA; Touhami, Y; Clemens, DP; Aldoretta, EJ; Morrison, ND; ten Brummelaar, TA; McAlister, HA; Kraus, S; Ridgway, ST; Sturmann, J; Sturmann, L; Taylor, B; Turner, NH; Farrington, CD; Goldfinger, PJ (American Astronomical Society / IOP Publishing, 2013-05-14)
    We present the first high angular resolution observations in the near-infrared H band (1.6 μm) of the luminous blue variable star P Cygni. We obtained six-telescope interferometric observations with the CHARA Array and 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 ...
  • Helicity inversion in spherical convection as a means for equatorward dynamo wave propagation 

    Duarte, LDV; Wicht, J; Browning, MK; Gastine, T (Oxford University Press (OUP), 2015-12-24)
    We discuss here a purely hydrodynamical mechanism to invert the sign of the kinetic helicity, which plays a key role in determining the direction of propagation of cyclical magnetism in most models of dynamo action by ...
  • 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 Efficiency CVD Graphene-lead (Pb) Cooper Pair Splitter 

    Borzenets, IV; Shimazaki, Y; Jones, GF; Craciun, Monica F.; Russo, Saverio; Yamamoto, Y; Tarucha, Seigo (2016)
    We demonstrate high efficiency Cooper pair splitting in a graphene-based device. We utilize a true Y-shape design effectively placing the splitting channels closer together: graphene is used as the central superconducting ...
  • High energy product in Battenberg structured magnets 

    Bance, S; Oezelt, H; Schrefl, T; Winklhofer, M; Hrkac, G; Zimanyi, G; Gutfleisch, O; Evans, RFL; Chantrell, RW; Shoji, T; Yano, M; Sakuma, N; Kato, A; Manabe, A (American Institute of Physics (AIP), 2014-11-10)
    © 2014 AIP Publishing LLC. Multiphase nano-structured permanent magnets show a high thermal stability of remanence and a high energy product while the amount of rare-earth elements is reduced. Non-zero temperature micromagnetic ...
  • 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. ...
  • High-resolution FTIR imaging of colon tissues for elucidation of individual cellular and histopathological features. 

    Nallala, J; Lloyd, GR; Shepherd, N; Stone, N (Royal Society of Chemistry, 2015-11-02)
    Novel technologies that could complement current histopathology based cancer diagnostic methods are under examination. In this endeavour mid-infrared spectroscopic imaging is a promising candidate that can provide valuable ...
  • 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 ...
  • Hollow carbon spheres in microwaves: Bio inspired absorbing coating 

    Bychanok, D; Li, S; Sanchez-Sanchez, A; Gorokhov, G; Kuzhir, P; Ogrin, FY; Pasc, A; Ballweg, T; Mandel, K; Szczurek, A; Fierro, V; Celzard, A (American Institute of Physics (AIP), 2016-01-04)
    The electromagnetic response of a heterostructure based on a monolayer of hollow glassy carbon spheres packed in 2D was experimentally surveyed with respect to its response to microwaves, namely, the Ka-band (26-37 GHz) ...
  • 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 ...
  • Holographic imaging of magnetization in a single layer nano-contact spin transfer oscillator 

    Parra, EOB; Bukin, N; Dupraz, M; Beutier, G; Sani, SR; Popescu, H; Cavill, SA; Akerman, J; Jaouen, N; Keatley, PS; Hicken, RJ; van der Laan, G; Ogrin, Feodor Y. (Institute of Electrical and Electronics Engineers (IEEE), 2016-02-11)
    Time-averaged images of the magnetization within single layer spin transfer oscillators have been obtained using the holography with extended reference by autocorrelation linear differential operator (HERALDO) technique. ...
  • 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: clear skies for cool Saturn WASP-39b 

    Fischer, PD; Knutson, HA; Sing, DK; Henry, GW; Williamson, MW; Fortney, JJ; Burrows, AS; Kataria, T; Nikolov, N; Showman, AP; Ballester, GE; Désert, J-M; Aigrain, S; Deming, D; Lecavelier des Etangs, A; Vidal-Madjar, A (American Astronomical Society, 2016-08-03)
    We present the Hubble Space Telescope (HST) Space Telescope Imaging Spectrograph (STIS) optical transmission spectroscopy of the cool Saturn-mass exoplanet WASP-39b from 0.29-1.025 μm, along with complementary transit ...