Now showing items 24-43 of 1346

  • Advection of potential temperature in the atmosphere of irradiated exoplanets: a robust mechanism to explain radius inflation 

    Tremblin, P; Chabrier, G; Mayne, NJ; Amundsen, DS; Baraffe, I; Debras, F; Drummond, B; Manners, J; Fromang, S (American Astronomical Society / IOP Publishing, 2017)
    The anomalously large radii of strongly irradiated exoplanets have remained a major puzzle in astronomy. Based on a 2D steady state atmospheric circulation model, the validity of which is assessed by comparison to 3D ...
  • Age Gradients in the Stellar Populations of Massive Star Forming Regions Based on a New Stellar Chronometer 

    Getman, KV; Feigelson, ED; Kuhn, MA; Broos, PS; Townsley, LK; Naylor, T; Povich, MS; Luhman, KL; Garmire, GP (American Astronomical Society, 2014-05-09)
    A major impediment to understanding star formation in massive star forming regions (MSFRs) is the absence of a reliable stellar chronometer to unravel their complex star formation histories. We present a new estimation of ...
  • Age-dependent dissociation of ATP synthase dimers and loss of inner-membrane cristae in mitochondria 

    Daum, B; Walter, A; Horst, A; Osiewacz, HD; Kuhlbrandt, W (National Academy of Sciences, 2013-09-17)
    Aging is one of the most fundamental, yet least understood biological processes that affect all forms of eukaryotic life. Mitochondria are intimately involved in aging, but the underlying molecular mechanisms are largely ...
  • Age-related changes in the effects of strength training on lower leg muscles in healthy individuals measured using MRI 

    Psatha, M; Wu, Z; Gammie, F; Ratkevicius, A; Wackerhage, H; Redpath, TW; Gilbert, FJ; Meakin, JR; Aspden, RM (BMJ Publishing Group, 2017)
    Background: We previously measured the rate of regaining muscle strength during rehabilitation of lower leg muscles in patients following lower leg casting. Our primary aim in this study was to measure the rate of ...
  • Aharonov-Bohm quantum rings in high-Q microcavities 

    Alexeev, Arseny; Shelykh, I.A.; Portnoi, M.E. (American Physical Society, 2013)
    A single-mode microcavity with an embedded Aharonov-Bohm quantum ring, which is pierced by a magnetic flux and subjected to a lateral electric field, is studied theoretically. It is shown that external electric and magnetic ...
  • An algorithm for Monte Carlo time-dependent radiation transfer 

    Harries, TJ (Oxford University Press (OUP) / Royal Astronomical Society, 2011-09-11)
    A new Monte Carlo algorithm for calculating time-dependent radiative transfer under the assumption of local thermodynamic equilibrium is presented. Unlike flux-limited diffusion, the method is polychromatic, includes ...
  • Algorithmic corrections for localization microscopy with sCMOS cameras - characterisation of a computationally efficient localization approach 

    Lin, R; Clowsley, AH; Jayasinghe, ID; Baddeley, D; Soeller, C (Optical Society of America, 2017-05-10)
    Modern sCMOS cameras are attractive for single molecule localization microscopy (SMLM) due to their high speed but suffer from pixel non-uniformities that can affect localization precision and accuracy. We present a ...
  • All-frequency reflectionlessness 

    Philbin, Thomas G. (IOP Publishing, 2015-12-11)
    We derive planar permittivity profiles that do not reflect perpendicularly exiting radiation of any frequency. The materials obey the Kramers-Kronig relations and have no regions of gain. Reduction of the Casimir force by ...
  • All-graphene photodetectors 

    Withers, Freddie; Bointon, Thomas H.; Craciun, Monica F.; Russo, Saverio (American Chemical Society, 2013)
    We investigate the optoelectronic properties of novel graphene/FeCl3-intercalated few-layer graphene (FeCl3-FLG, dubbed graphexeter) heterostructures using photovoltage spectroscopy. We observe a prominent photovoltage ...
  • All-Optical Generation of Surface Plasmons in Graphene 

    Constant, Thomas J.; Hornett, Samuel M.; Chang, D.E.; Hendry, Euan (Cornell University, 2015-05-01)
    Here we present an all-optical plasmon coupling scheme, utilising the intrinsic nonlinear optical response of graphene. We demonstrate coupling of free-space, visible light pulses to the surface plasmons in a planar, ...
  • An alternative calculation of the Casimir forces between birefringent plates 

    Philbin, Thomas G.; Leonhardt, Ulf (American Physical Society, 2008)
    Barash has calculated the Casimir forces between parallel birefringent plates with optical axes parallel to the plate boundaries [Izv. Vyssh. Uchebn.\ Zaved., Radiofiz., {\bf 12}, 1637 (1978)]. The interesting new feature ...
  • AMBER closure and differential phases: accuracy and calibration with a beam commutation 

    Millour, F; Petrov, RG; Vannier, M; Kraus, S (Society of Photo-optical Instrumentation Engineers (SPIE), 2008-07-28)
    The first astrophysical results of the VLTI focal instrument AMBER have shown the importance of the differential and closure phase measures, which are supposed to be much less sensitive to atmospheric and instrumental ...
  • AMBER/VLTI and MIDI/VLTI spectro-interferometric observations of the B[e] supergiant CPD-57\deg2874. Size and geometry of the circumstellar envelope in the near- and mid-IR 

    Domiciano de Souza, A; Driebe, T; Chesneau, O; Hofmann, K-H; Kraus, S; Miroshnichenko, AS; Ohnaka, K; Petrov, RG; Preisbisch, T; Stee, P; Weigelt, G; Lisi, F; Malbet, F; Richichi, A (EDP Sciences, 2007-02-20)
    We present the first high spatial and spectral resolution observations of the circumstellar envelope (CSE) of a B[e] supergiant (CPD−57◦ 2874), performed with the Very Large Telescope Interferometer (VLTI). Spectra, ...
  • AMBER/VLTI high spectral resolution observations of the Brγ emitting region in HD 98922. A compact disc wind launched from the inner disc region 

    Caratti o Garatti, A; Tambovtseva, LV; Garcia Lopez, R; Kraus, Stefan; Schertl, D.; Grinin, VP; Weigelt, Gerd; Hofmann, Karl-Heinz; Massi, F.; Lagarde, S.; Vannier, M.; Malbet, F. (EDP Sciences, 2015-10)
    Context. High angular and spectral resolution observations can provide us with fundamental clues to the complex circumstellar structure of young stellar objects (YSOs) and to the physical processes taking place close to ...
  • AMBER/VLTI observations of the B[e] star MWC 300 

    Wang, Y.; Weigelt, Gerd; Kreplin, Alexander; Hofmann, Karl-Heinz; Kraus, Stefan; Miroshnichenko, A.S.; Schertl, D.; Chelli, A.; Domiciano de Souza, A.; Massi, F.; Robbe-Dubois, S. (EDP Sciences for European Southern Observatory (ESO), 2012)
    Aims. We study the enigmatic B[e] star MWC 300 to investigate its disk and binary with milli-arcsecond-scale angular resolution. Methods. We observed MWC 300 with the VLTI/AMBER instrument in the H and K bands and ...
  • Ambipolar diffusion in low-mass star formation. I. General comparison with the ideal MHD case 

    Masson, J; Chabrier, G; Hennebelle, P; Vaytet, N; Commerçon, B (EDP Sciences, 2016-02-12)
    In this paper, we provide a more accurate description of the evolution of the magnetic flux redistribution during prestellar core collapse by including resistive terms in the magnetohydrodynamics (MHD) equations. We focus ...
  • AMI-LA radio continuum observations of Spitzer c2d small clouds and cores: Perseus region 

    Scaife, Anna M.M.; Hatchell, Jennifer; Davies, Matthew; Franzen, Thomas M.O.; Grainge, Keith J.B.; Hobson, Michael P.; Hurley-Walker, Natasha; Lasenby, Anthony N.; Olamaie, Malak; Perrott, Yvette C.; Pooley, Guy G.; Rodríguez-Gonzálvez, Carmen; Saunders, Richard D.E.; Schammel, Michel P.; Scott, Paul F.; Shimwell, Timothy; Titterington, David; Waldram, Elizabeth (Oxford University Press / Royal Astronomical Society, 2011)
    We present deep radio continuum observations of the cores identified as deeply embedded young stellar objects in the Perseus molecular cloud by the Spitzer c2d programme at a wavelength of 1.8 cm with the Arcminute Microkelvin ...
  • Analog wormholes and black hole laser effects in hydrodynamics 

    Peloquin, C; Euvé, L-P; Philbin, T; Rousseaux, G (American Physical Society, 2016-04-18)
    We numerically study water wave packets on a spatially varying countercurrent in the presence of surface tension. Depending on the details of the velocity profile, we show that traversable and bidirectional analogue wormholes ...
  • Analysis of the sign-dependent switching observed in a hybrid aligned nematic cell 

    Cornford, Stephen Leslie; Taphouse, T. S.; Sambles, J. Roy (Institute of Physics and Deutsche Physikalische Gesellschaft, 2009)
    An optical waveguide experiment was used to study the influence of dc electric fields on a hybrid aligned nematic liquid crystal cell. This dc switching differed from ac switching in two ways: first, the equilibrium states ...
  • Analytical core mass function (CMF) from filaments: Under which circumstances can filament fragmentation reproduce the CMF? 

    Lee, Y-N; Hennebelle, P; Chabrier, G (American Astronomical Society / IOP Publishing, 2017-09-28)
    Observations suggest that star formation in filamentary molecular clouds occurs in a two-step process, with the formation of filaments preceding that of prestellar cores and stars. Here, we apply the gravo-turbulent ...