Now showing items 404-423 of 1119

  • 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 ...
  • HARPS3 for a roboticized Isaac Newton telescope 

    Thompson, SJ; Queloz, D; Baraffe, I; Brake, M; Dolgopolov, A; Fisher, M; Fleury, M; Geelhoed, J; Hall, R; Hernandez, JIG; Horst, RT; Kragt, J; Navarro, R; Naylor, T; Pepe, F; Piskunov, N; Rebolo, R; Sander, L; Segransan, D; Seneta, E; Sing, D; Snellen, I; Snik, F; Spronck, J; Stempels, E; Sun, X; Tschudi, SS; Young, J (Society of Photo-optical Instrumentation Engineers (SPIE), 2016)
    We present a description of a new instrument development, HARPS3, planned to be installed on an upgraded and roboticized Isaac Newton Telescope by end-2018. HARPS3 will be a high resolution (R = 115,000) echelle spectrograph ...
  • HAT-P-26b: A Neptune-mass exoplanet with a well-constrained heavy element abundance 

    Wakeford, HR; Sing, DK; Kataria, T; Deming, D; Nikolov, N; Lopez, E; Tremblin, P; Amundsen, DS; Lewis, N; Mandell, A; Fortney, JJ; Knutson, H; Benneke, B; Evans, T (American Association for the Advancement of Science, 2017-05-12)
    A correlation between giant-planet mass and atmospheric heavy elemental abundance was first noted in the past century from observations of planets in our own Solar System and has served as a cornerstone of planet-formation ...
  • 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 ...
  • Head & neck optical diagnostics: vision of the future of surgery. 

    Upile, T; Jerjes, W; Sterenborg, HJCM; El-Naggar, AK; Sandison, A; Witjes, MJH; Biel, MA; Bigio, I; Wong, BJF; Gillenwater, A; MacRobert, AJ; Robinson, DJ; Betz, CS; Stepp, H; Bolotine, L; McKenzie, G; Mosse, CA; Barr, H; Chen, Z; Berg, K; D'Cruz, AK; Stone, N; Kendall, C; Fisher, S; Leunig, A; Olivo, M; Richards-Kortum, R; Soo, KC; Bagnato, V; Choo-Smith, L-P; Svanberg, K; Tan, IB; Wilson, BC; Wolfsen, H; Yodh, AG; Hopper, C (Open Access Publishing London, 2009-07-13)
    Review paper and Proceedings of the Inaugural Meeting of the Head and Neck Optical Diagnostics Society (HNODS) on March 14th 2009 at University College London. The aim of our research must be to provide breakthrough ...
  • 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 cadence, high resolution spectroscopic observations of Herbig stars HD 98922 and V1295 Aquila 

    Aarnio, AN; Monnier, JD; Harries, TJ; Kraus, S; Calvet, N; Acreman, D; Che, X (American Astronomical Society, 2017-10-05)
    Recent observational work has indicated mechanisms for accretion and out ow in Herbig Ae/Be star-disk systems may di er from magnetospheric accretion as it is thought to occur in T Tauri star-disk systems. In this work, ...
  • 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 sensitivity non-invasive detection of calcifications deep inside biological tissue using Transmission Raman Spectroscopy. 

    Ghita, A; Matousek, P; Stone, N (Wiley, 2017-06-21)
    The aim of this research was to develop a novel approach to probe non-invasively the composition of inorganic chemicals buried deep in large volume biological samples. The method is based on advanced Transmission Raman ...
  • 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. ...
  • A high-mass protobinary system with spatially resolved circumstellar accretion disks and circumbinary disk 

    Kraus, S; Kluska, J; Kreplin, A; Bate, M; Harries, T; Hofmann, K-H; Hone, E; Monnier, JD; Weigelt, G; de Wit, W-J; Wittkowski, M (American Astronomical Society / IOP Publishing, 2017-01-16)
    High-mass multiples might form via fragmentation of self-gravitational disks or alternative scenarios such as disk-assisted capture. However, only few observational constraints exist on the architecture and disk structure ...
  • High-performance versatile setup for simultaneous Brillouin-Raman micro-spectroscopy 

    Scarponi, F; Mattana, S; Corezzi, S; Caponi, S; Comez, L; Sassi, P; Morresi, A; Paolantoni, M; Urbanelli, L; Emiliani, C; Roscini, L; Corte, L; Cardinali, G; Palombo, F; Sandercock, J; Fioretto, D (American Physical Society, 2017-07-21)
    Brillouin and Raman scattering spectroscopy are established techniques for the nondestructive contactless and label-free readout of mechanical, chemical and structural properties of condensed matter. Brillouin-Raman ...
  • 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 ...
  • High-temperature measurements of VUV-absorption cross sections of CO2 and their application to exoplanets 

    Venot, O; Fray, N; Bénilan, Y; Gazeau, M-C; Hébrard, E; Larcher, G; Schwell, M; Dobrijevic, M; Selsis, F (EDP Sciences for European Southern Observatory (ESO), 2013-03-07)
    UV absorption cross sections are an essential ingredient of photochemical atmosphere models. Exoplanet searches have unveiled a large population of short-period objects with hot atmospheres, very different from what we ...
  • Highly Efficient Rubrene–Graphene Charge-Transfer Interfaces as Phototransistors in the Visible Regime 

    Jones, GF; Pinto, RM; De Sanctis, A; Nagareddy, KV; Wright, DC; Alves, H; Craciun, MF; Russo, S (Wiley, 2017-09-25)
    Atomically thin materials such as graphene are uniquely responsive to charge transfer from adjacent materials, making them ideal charge-transport layers in phototransistor devices. Effective implementation of organic ...