Now showing items 312-331 of 729

  • A Jacobian-free Newton-Krylov method for time-implicit multidimensional hydrodynamics 

    Viallet, M; Goffrey, T; Baraffe, I; Folini, D; Geroux, C; Popov, M; Pratt, J; Walder, R (arXiv.org, 2015-12-14)
    This work is a continuation of our efforts to develop an efficient implicit solver for multidimensional hydrodynamics for the purpose of studying important physical processes in stellar interiors, such as turbulent convection ...
  • The JCMT Gould Belt Survey: a first look at dense cores in Orion B 

    Kirk, H; Di Francesco, J; Johnstone, D; Duarte-Cabral, A; Sadavoy, S; Hatchell, J; Mottram, JC; Buckle, J; Berry, DS; Broekhoven-Fiene, H; Currie, MJ; Fich, M; Jenness, T; Nutter, D; Pattle, K; Pineda, JE; Quinn, C; Salji, C; Tisi, S; Hogerheijde, MR; Ward-Thompson, D; Bastien, P; Bresnahan, D; Butner, H; Chen, M; Chrysostomou, A; Coude, S; Davis, CJ; Drabek-Maunder, E; Fiege, J; Friberg, P; Friesen, R; Fuller, GA; Graves, S; Greaves, J; Gregson, J; Holland, W; Joncas, G; Kirk, JM; Knee, LBG; Mairs, S; Marsh, K; Matthews, BC; Moriarty-Schieven, G; Mowat, C; Rawlings, J; Richer, J; Robertson, D; Rosolowsky, E; Rumble, D; Thomas, H; Tothill, N; Viti, S; White, GJ; Wouterloot, J; Yates, J; Zhu, M (IOP Publishing, 2016-02-01)
    We present a first look at the SCUBA-2 observations of three sub-regions of the Orion B molecular cloud: LDN 1622, NGC 2023/2024, and NGC 2068/2071, from the JCMT Gould Belt Legacy Survey. We identify 29, 564, and 322 dense ...
  • The JCMT Gould Belt Survey: a quantitative comparison between SCUBA-2 data reduction methods 

    Mairs, S; Johnstone, D; Kirk, H; Graves, S; Buckle, J; Beaulieu, SF; Berry, DS; Broekhoven-Fiene, H; Currie, MJ; Fich, M; Hatchell, Jennifer; Jenness, T; Mottram, JC; Nutter, D; Pattle, K; Pineda, JE; Salji, C; Francesco, JD; Hogerheijde, MR; Ward-Thompson, D; JCMT Gould Belt survey Team (Oxford University Press for Royal Astronomical Society, 2015-12-01)
    Performing ground-based submillimetre observations is a difficult task as the measurements are subject to absorption and emission from water vapour in the Earth's atmosphere and time variation in weather and instrument ...
  • The JCMT Gould Belt Survey: constraints on prestellar core properties in Orion A North 

    Salji, CJ; Richer, JS; Buckle, JV; Hatchell, Jennifer; Kirk, H; Beaulieu, SF; Berry, DS; Broekhoven-Fiene, H; Currie, MJ; Fich, M; Jenness, T; Johnstone, D; Mottram, JC; Nutter, D; Pattle, K; Pineda, JE; Quinn, Ciara; Tisi, S; Walker-Smith, S; Francesco, JD; Hogerheijde, MR; Ward-Thompson, D; Bastien, P; Butner, H; Chen, M; Chrysostomou, A; Coude, S; Davis, CJ; Drabek-Maunder, E; Duarte-Cabral, A.; Fiege, J; Friberg, P; Friesen, R; Fuller, GA; Graves, S; Greaves, J; Gregson, J; Holland, W; Joncas, G; Kirk, JM; Knee, LBG; Mairs, S; Marsh, K; Matthews, BC; Moriarty-Schieven, G; Rawlings, J.; Robertson, D.; Rosolowsky, E.; Rumble, D.; Sadavoy, S; Thomas, H.; Tothill, N; Viti, S; White, GJ; Wilson, CD; Wouterloot, J; Yates, J; Zhu, M (Oxford University Press for Royal Astronomical Society, 2015-05-01)
    We employ SCUBA-2 (Submillimetre Common-User Bolometer Array 2) observations of the Orion A North molecular cloud to derive column density and temperature maps. We apply a novel, Hessian-based structural identification ...
  • The JCMT gould belt survey: Evidence for radiative heating in serpens MWC 297 and its influence on local star formation 

    Rumble, D.; Hatchell, Jennifer; Gutermuth, Robert A.; Kirk, H.; Buckle, J.; Beaulieu, S.F.; Berry, D.S.; Broekhoven-Fiene, H.; Currie, M.J.; Fich, M.; Jenness, T.; Johnstone, D.; Mottram, J.C.; Nutter, D.; Pattle, K.; Pineda, J.E.; Quinn, Ciara; Salji, C.; Tisi, S.; Walker-Smith, S.; Di Francesco, J.; Hogerheijde, MR; Ward-Thompson, D.; Allen, L.E.; Cieza, L.A.; Dunham, M.M.; Harvey, P.M.; Stapelfeldt, K.R.; Bastien, P.; Butner, H.; Chen, M.; Chrysostomou, A.; Coude, S.; Davis, C.J.; Drabek-Maunder, Emily R.; Duarte-Cabral, A.; Fiege, J.; Friberg, P.; Friesen, R.; Fuller, G.A.; Graves, S.; Greaves, J.; Gregson, J.; Holland, W; Joncas, G.; Kirk, J.M.; Knee, L.B.G.; Mairs, S.; Marsh, K.; Matthews, B.C.; Moriarty-Schieven, G.; Rawlings, J.; Richer, J.; Robertson, D.; Rosolowsky, E.; Sadavoy, S.I.; Thomas, H.; Tothill, N.; Viti, S.; White, G.J.; Wilson, C.D.; Wouterloot, J.; Yates, J.; Zhu, Ming (Oxford University Press for Royal Astronomical Society, 2015-02-14)
    We present SCUBA-2 450 and 850 μm observations of the Serpens MWC 297 region, part of the James Clerk Maxwell Telescope (JCMT) Gould Belt Survey of nearby star-forming regions. Simulations suggest that radiative feedback ...
  • The JCMT Gould Belt Survey: first results from the SCUBA-2 observations of the Ophiuchus molecular cloud and a virial analysis of its prestellar core population 

    Pattle, K; Ward-Thompson, D; Kirk, JM; White, GJ; Drabek-Maunder, E; Buckle, J; Beaulieu, SF; Berry, DS; Broekhoven-Fiene, H; Currie, M; Fich, M; Hatchell, Jennifer; Kirk, H; Jenness, T; Johnstone, D; Mottram, JC (Oxford University Press for Royal Astronomical Society, 2015-06)
    In this paper, we present the first observations of the Ophiuchus molecular cloud performed as part of the James Clerk Maxwell Telescope (JCMT) Gould Belt Survey (GBS) with the SCUBA-2 instrument. We demonstrate methods ...
  • The JCMT Gould Belt Survey: SCUBA-2 observations of circumstellar discs in L 1495 

    Buckle, JV; Drabek-Maunder, E; Greaves, J; Richer, JS; Matthews, BC; Johnstone, D; Kirk, H; Beaulieu, SF; Berry, DS; Broekhoven-Fiene, H; Currie, MJ; Fich, M; Hatchell, J; Jenness, T; Mottram, JC; Nutter, D; Pattle, K; Pineda, JE; Salji, C; Tisi, S; Francesco, JD; Hogerheijde, MR; Ward-Thompson, D; Bastien, P; Butner, H; Chen, M; Chrysostomou, A; Coude, S; Davis, CJ; Duarte-Cabral, A; Friberg, P; Friesen, R; Fuller, GA; Graves, S; Gregson, J; Holland, W; Joncas, G; Kirk, JM; Knee, LBG; Mairs, S; Marsh, K; Moriarty-Schieven, G; Rawlings, J; Rosolowsky, E; Rumble, D; Sadavoy, S; Thomas, H; Tothill, N; Viti, S; White, GJ; Wilson, CD; Wouterloot, J; Yates, J; Zhu, M (Oxford Journals, 2015-05-01)
    We present 850 and 450 μm data from the James Clerk Maxwell Telescope (JCMT) Gould Belt Survey obtained with Submillimetre Common-User Bolometer Array 2 (SCUBA-2) and characterize the dust attributes of Class I, Class II ...
  • The JCMT Gould Belt Survey: SCUBA-2 observations of radiative feedback in NGC1333 

    Hatchell, Jennifer; Wilson, T.; Drabek, E.; Curtis, E.; Richer, J.; Di Francesco, J.; Ward-Thompson, D. (Oxford University Press for Royal Astronomical Society, 2013)
    We present observations of NGC 1333 from SCUBA-2 on the James Clerk Maxwell Telescope (JCMT), observed as a JCMT Gould Belt Survey pilot project during the shared risk campaign when the first of four arrays was installed ...
  • The JCMT Gould Belt Survey: the effect of molecular contamination in SCUBA-2 observations of Orion A 

    Coudé, S; Bastien, P; Kirk, H; Johnstone, D; Drabek-Maunder, Emily R.; Graves, S; Hatchell, Jennifer; Chapin, EL; Gibb, AG; Matthews, B.C.; JCMT Gould Belt Survey Team (Royal Astronomical Society, 2016-04-01)
    Thermal emission from cold dust grains in giant molecular clouds can be used to probe the physical properties, such as density, temperature and emissivity in star-forming regions. We present the Submillimetre Common-User ...
  • The JCMT Gould Belt Survey: understanding the influence of outflows on Gould Belt clouds 

    Drabek-Maunder, Emily R.; Hatchell, Jennifer; Buckle, JV; Di Francesco, J.; Richer, J. (Royal Astronomical Society, 2016-03-01)
    Using James Clerk Maxwell Telescope (JCMT) Gould Belt Survey data from CO J = 3 → 2 isotopologues, we present a meta-analysis of the outflows and energetics of star-forming regions in several Gould Belt clouds. The majority ...
  • Klein backscattering and Fabry-Pérot interference in graphene heterojunctions 

    Shytov, A.V.; Rudner, M.S.; Levitov, L.S. (American Physical Society, 2008)
    We present a theory of quantum-coherent transport through a lateral p-n-p structure in graphene, which fully accounts for the interference of forward and backward scattering on the p-n interfaces. The backreflection amplitude ...
  • Klein tunneling, contact doping, and pn-interfaces in gated suspended graphene 

    Laitinen, Antti; Paraoanu, G.S.; Oksanen, Mika; Craciun, Monica F.; Russo, Saverio; Sonin, Edouard; Hakonen, Pertti (arXiv.org, 2015)
    The inherent asymmetry of the electric transport in graphene is attributed to Klein tunneling across barriers defined by pn-interfaces between positively and negatively charged regions. By combining conductance and shot ...
  • Ks-Band Detection of Thermal Emission and Color Constraints to CoRoT-1b: A Low-Albedo Planet with Inefficient Atmospheric Energy Redistribution and a Temperature Inversion 

    Rogers, Justin C.; Apai, Daniel; Lopez-Morales, M.; Sing, David K.; Burrows, A.S. (IOP Publishing for American Astronomical Society, 2009)
    We report the detection in Ks-band of the secondary eclipse of the hot Jupiter CoRoT-1b from time series photometry with the ARC 3.5 m telescope at Apache Point Observatory. The eclipse shows a depth of 0.336 ± 0.042% ...
  • Label-free chemically specific imaging in planta with stimulated Raman scattering microscopy. 

    Mansfield, Jessica; Littlejohn, George; Seymour, Mark P.; Lind, Rob; Perfect, Sarah; Moger, Julian (American Chemical Society, 2013-05-21)
    The growing world population puts ever-increasing demands on the agricultural and agrochemical industries to increase agricultural yields. This can only be achieved by investing in fundamental plant and agrochemical research ...
  • Lamellar and fibre bundle mechanics of the annulus fibrosus in bovine intervertebral disc 

    Vergari, C; Mansfield, J; Meakin, J; Winlove, CP (Elsevier, 2016-04-06)
    The intervertebral disc is a multicomposite structure, with an outer fibrous ring, the annulus fibrosus, retaining a gel-like core, the nucleus pulposus. The disc presents complex mechanical behaviour, and it is of high ...
  • Large amplitude magnetization dynamics and the suppression of edge modes in a single nanomagnet 

    Keatley, Paul Steven; Gangmei, Prim; Dvornik, Mykola; Hicken, R.J.; Childress, J.R.; Katine, J.A. (American Institute of Physics, 2011)
    Large amplitude magnetization dynamics of a single square nanomagnet have been studied by time-resolved Kerr microscopy. Experimental spectra revealed that only a single mode was excited for all bias field values. Micromagnetic ...
  • Leaky-wave exploration of two-stage switch-on in a nematic pi-cell 

    Ruan, Lizhen; Sambles, J. Roy (American Institute of Physics, 2005)
    The two-stage switch-on dynamics of a nematic pi-cell are explored in detail using a convergent beam fully-leaky guided mode technique. The cell shows an initial switch-on with a time scale in the range several ms to tens ...
  • Levinson's theorem and scattering phase-shift contributions to the partition function of interacting gases in two dimensions 

    Portnoi, M.E.; Galbraith, I. (American Physical Society, 1998)
    We consider scattering state contributions to the partition function of a two-dimensional (2D) plasma in addition to the bound-state sum. A partition function continuity requirement is used to provide a statistical mechanical ...
  • Light circulation and weaving in periodically patterned structures 

    Crouse, David; Jaquay, Eric; Maikal, Abdur; Hibbins, Alastair P. (American Physical Society, 2008)
    The circulation and weaving of light in one-dimensionally periodic structures as a result of the excitation of phase resonances are described. It is shown that phase resonances occur for s-polarized incident light with ...
  • Light emission through a corrugated metal film: The role of cross-coupled surface plasmon polaritons 

    Wedge, S.; Hooper, Ian R.; Sage, I.; Barnes, William L. (American Physical Society, 2004)
    We examine the phenomenon of light emission through a thin metal film that takes place via surface plasmon polaritons. Surface plasmon polariton cross coupling has recently been invoked to explain sharp features observed ...