Now showing items 713-732 of 1437

  • An M-dwarf star in the transition disk of Herbig HD 142527 

    Lacour, S; Biller, B; Cheetham, A; Greenbaum, A; Pearce, T; Marino, S; Tuthill, P; Pueyo, L; Mamajek, EE; Girard, JH; Sivaramakrishnan, A; Bonnefoy, M; Baraffe, I; Chauvin, G; Olofsson, J; Juhasz, A; Benisty, M; Pott, J-U; Sicilia-Aguilar, A; Henning, T; Cardwell, A; Goodsell, S; Graham, JR; Hibon, P; Ingraham, P; Konopacky, Q; Macintosh, B; Oppenheimer, R; Perrin, M; Rantakyrö, F; Sadakuni, N; Thomas, S (EDP Sciences, 2016-06)
    Aims. HD 142527A is one of the most studied Herbig Ae/Be stars with a transitional disk, as it has the largest imaged gap in any protoplanetary disk: the gas is cleared from 30 to 90 AU. The HD 142527 system is also unique ...
  • Macromolecular organization of ATP synthase and complex I in whole mitochondria 

    Davies, KM; Strauss, M; Daum, B; Kief, JH; Osiewacz, HD; Rycovska, A; Zickermann, V; Kuhlbrandt, W (National Academy of Sciences, 2011-08-23)
    We used electron cryotomography to study the molecular arrangement of large respiratory chain complexes in mitochondria from bovine heart, potato, and three types of fungi. Long rows of ATP synthase dimers were observed ...
  • Macroscopic ordering of polystyrene carboxylate-modified nanospheres self-assembled at the water-air interface 

    Sirotkin, Evgeny; Apweiler, Julius D.; Ogrin, Feodor Y. (American Chemical Society, 2010)
    We present results from an experimental study of ordering characteristics in monolayers of polystyrene nanospheres self-assembled at a water-air interface. We demonstrate that the interaction of spheres, governed by the ...
  • Magnesium in the atmosphere of the planet HD 209458 b: Observations of the thermosphere-exosphere transition region 

    Vidal-Madjar, A.; Huitson, Catherine M.; Bourrier, V.; Desert, J.-M.; Ballester, G.; Lecavelier des Etangs, A.; Sing, David K.; Ehrenreich, D.; Ferlet, R.; Hebrard, G.; McConnell, J.C. (EDP Sciences for European Southern Observatory (ESO), 2013)
    The planet HD 209458 b is one of the most well studied hot-Jupiter exoplanets. The upper atmosphere of this planet has been observed through ultraviolet/optical transit observations with H i observation of the exosphere ...
  • Magnetic braking formulation for Sun-like stars: dependence on dipole field strength and rotation rate 

    Matt, Sean P.; MacGregor, Keith B.; Pinsonneault, Marc H.; Greene, Thomas P. (American Astronomical Society, 2012-06-11)
    We use two-dimensional axisymmetric magnetohydrodynamic simulations to compute steady-state solutions for solar-like stellar winds from rotating stars with dipolar magnetic fields. Our parameter study includes 50 simulations ...
  • Magnetic Braking Formulation for Sun-like Stars: Dependence on Dipole Field Strength and Rotation Rate 

    Matt, Sean P.; MacGregor, Keith B.; Pinsonneault, Marc H.; Greene, Thomas P. (American Astronomical Society / IoP Publishing, 2012)
    We use two-dimensional axisymmetric magnetohydrodynamic simulations to compute steady-state solutions for solar-like stellar winds from rotating stars with dipolar magnetic fields. Our parameter study includes 50 simulations ...
  • Magnetic braking of Sun-like and low-mass stars: Dependence on coronal temperature 

    Pantolmos, G; Matt, SP (American Astronomical Society, 2017-11-06)
    Sun-like and low-mass stars possess high temperature coronae and lose mass in the form of stellar winds, driven by thermal pressure and complex magnetohydrodynamic processes. These magnetized outflows probably do not ...
  • Magnetic Cycles in a Convective Dynamo Simulation of a Young Solar-type Star 

    Brown, Benjamin P.; Miesch, Mark S.; Browning, Matthew K.; Brun, Allan Sacha; Toomre, Juri (American Astronomical Society / IOP Publishing, 2011)
    Young solar-type stars rotate rapidly and many are magnetically active. Some appear to undergo magnetic cycles similar to the 22 yr solar activity cycle. We conduct simulations of dynamo action in rapidly rotating suns ...
  • Magnetic field evolution and reversals in spiral galaxies (article) 

    Dobbs, CL; Price, DJ; Pettit, AR; Bate, Matthew R,; Tricco, TS (Oxford University Press (OUP), 2016-10-01)
    We study the evolution of galactic magnetic fields using 3D smoothed particle magnetohydrodynamics (SPMHD) simulations of galaxies with an imposed spiral potential.We consider the appearance of reversals of the field, and ...
  • Magnetic field evolution and reversals in spiral galaxies (dataset) 

    Dobbs, CL; Price, DJ; Pettit, AR; Bate, Matthew R,; Tricco, TS (University of Exeter, 2016-10-01)
    Dataset for simulations presented in Dobbs, Price, Pettitt & Bate 2016, MNRAS, 461, 4482
  • Magnetic Field-Sensitive Radical Pair Dynamics in Polymethylene Ether-Bridged Donor–Acceptor Systems 

    Hoang, HM; Pham, VTB; Grampp, G; Kattnig, DR (American Chemical Society, 2018-08-31)
    Donor–acceptor systems forming exciplexes are versatile models for the study of magnetic field effects (MFEs) on charge recombination reactions. The MFEs originate from singlet–triplet interconversion within transient ...
  • Magnetic games between a planet and its host star: the key role of topology 

    Strugarek, Antoine; Brun, Allan Sacha; Matt, Sean P.; Réville, Victor (Institute of Physics Publishing, 2015-12-20)
    Magnetic interactions between a star and a close-in planet are postulated to be a source of enhanced emissions and to play a role in the secular evolution of the orbital system. Close-in planets generally orbit in the ...
  • Magnetic imaging by x-ray holography using extended references 

    Duckworth, Thomas A.; Ogrin, Feodor Y.; Dhesi, Sarnjeet S.; Langridge, Sean; Whiteside, Amy; Moore, Thomas; Beutier, Guillaume; van der Laan, Gerrit (Optical Society of America, 2011)
    We demonstrate magnetic lensless imaging by Fourier transform holography using extended references. A narrow slit milled through an opaque gold mask is used as a holographic reference and magnetic contrast is obtained by ...
  • Magnetic interfaces as sources of coherent spin waves 

    Poimanov, VD; Kuchko, AN; Kruglyak, VV (American Physical Society, 2018-09-14)
    We have developed a simple but general analytical theory that elucidates the mechanism of spin-wave generation from interfaces between ferromagnetic media pumped by a uniform microwave magnetic field. Our calculations show ...
  • Magnetic neutron star cooling and microphysics 

    Potekhin, AY; Chabrier, G (EDP Sciences, 2018-01-10)
    We study the relative importance of several recent updates of microphysics input to the neutron star cooling theory and the effects brought about by superstrong magnetic fields of magnetars, including the effects of the ...
  • Magnetic processes in astrophysics: theory, simulations, experiments 

    Browning, Matthew K. (Taylor & Francis, 2014-10-21)
    Book Review Magnetic processes in astrophysics: theory, simulations, experiments, by Gunther Rudiger, Rainer Hollerbach, and Leonid L. Kitchatinov, Wiley-VCH Verlag GmbH & Co. KGaA, Boschstr. 12, 69469 Weinheim, Germany, ...
  • Magnetic quantum dots and rings in two dimensions 

    Downing, CA; Portnoi, ME (American Physical Society, 2016-07-25)
    We consider the motion of electrons confined to a two-dimensional plane with an externally applied perpendicular inhomogeneous magnetic field, both with and without a Coulomb potential. We find that as long as the magnetic ...
  • Magnetic second harmonic generation at the Co2MnSi/AlO x interface 

    Shelford, L.R.; Liu, Y.; Hicken, R.J.; Sakuraba, Y.; Oogane, M.; Ando, Y. (American Institute of Physics, 2008)
    We have studied magnetic second harmonic generation (MSHG) at the Co2MnSi/AlOx interface. The variation of the MSHG intensity was consistent with the nonvanishing components of the nonlinear susceptibility tensor expected ...
  • Magnetically controlled ferromagnetic swimmers 

    Hamilton, JK; Petrov, PG; Winlove, CP; Gilbert, AD; Bryan, MT; Ogrin, FY (Springer Nature, 2017-03-09)
    Microscopic swimming devices hold promise for radically new applications in lab-on-a-chip and microfluidic technology, diagnostics and drug delivery etc. In this paper, we demonstrate the experimental verification of a new ...
  • Magnetically self-regulated formation of early protoplanetary discs 

    Hennebelle, P; Commercon, B; Chabrier, G; Marchand, P (American Astronomical Society, 2016-10-06)
    The formation of protoplanetary discs during the collapse of molecular dense cores is significantly influenced by angular momentum transport, notably by the magnetic torque. In turn, the evolution of the magnetic field is ...