Now showing items 415-434 of 789

    • Mordell-Weil torsion in the mirror of multi-sections 

      Oehlmann, Paul-Konstantin; Reuter, Jonas; Schimannek, Thorsten (Springer, 2016-12-12)
      We give further evidence that genus-one fibers with multi-sections are mirror dual to fibers with Mordell-Weil torsion. In the physics of F-theory compactifications this implies a relation between models with a non-simply ...
    • More Toda-like (0,2) mirrors 

      Chen, Zhuo; Guo, Jirui; Sharpe, Eric R.; Wu, Ruoxu (Springer, 2017-08-21)
      In this paper, we extend our previous work to construct (0, 2) Toda-like mirrors to A/2-twisted theories on more general spaces, as part of a program of understanding (0,2) mirror symmetry. Specifically, we propose (0, 2) ...
    • Multi-messenger Observations of a Binary Neutron Star Merger 

      Abbott, B. P.; Simonetti, John H.; Tsai, J.; Nathaniel, K. (2017-10-20)
      On 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors. The Fermi ...
    • Multi-photon patterning of photoactive o-nitrobenzyl ligands bound to gold surfaces 

      Magill, Brenden A.; Guo, Xi; Peck, Cheryl L.; Reyes, Roberto L.; See, Erich M.; Santos, Webster L.; Robinson, Hans D. (ROYAL SOC CHEMISTRY, 2019-01-01)
      We quantitatively investigate lithographic patterning of a thiol-anchored self-assembled monolayer (SAM) of photocleavable o-nitrobenzyl ligands on gold through a multi-photon absorption process at 1.7 eV (730 nm wavelength). ...
    • Multicritical behavior in coupled directed percolation processes 

      Täuber, Uwe C.; Howard, M. J.; Hinrichsen, H. (1998-03-09)
    • Multigroup neutron transport. I. Full range 

      Bowden, Robert L.; Sancaktar, S.; Zweifel, P. F. (AIP Publishing, 1976-01)
      A functional analytic approach to the N_group, isotropic scattering, particle transport problem is presented. A full_range eigenfunction expansion is found in a particularly compact way, and the stage is set for the ...
    • Multigroup neutron transport. II. Half range 

      Bowden, Robert L.; Sancaktar, S.; Zweifel, P. F. (AIP Publishing, 1976-01)
      This paper accompanies a preceding one in which a functional analytic method was used to obtain the full_range expansion in multigoup neutron transport. In the present paper the analysis is extended to obtain the half_range ...
    • Multiple fibrations in Calabi-Yau geometry and string dualities 

      Anderson, Lara B.; Gao, Xin; Gray, James; Lee, Seung-Joo (Springer, 2016-10-19)
      In this work we explore the physics associated to Calabi-Yau (CY) n-folds that can be described as a fibration in more than one way. Beginning with F-theory vacua in various dimensions, we consider limits/dualities with ...
    • Multispecies pair annihilation reactions 

      Deloubriere, O.; Hilhorst, H. J.; Täuber, Uwe C. (American Physical Soc, 2002-12-16)
    • Multispectral size-averaged incoherent spatial filtering 

      Almeida, S. P.; Case, S. K.; Dallas, W. J. (Optical Society of America, 1979-08)
      A method of 2-D size-averaged incoherent recognition filtering is described. White light input illumination is used to multiplex chromatically a continuum of inputs differing in their spatial Fourier spectral magnifications. ...
    • Multiwavelength campaign on Mrk 509 I. Variability and spectral energy distribution 

      Kaastra, J. S.; Petrucci, P. O.; Cappi, M.; Arav, Nahum; Behar, E.; Bianchi, S.; Bloom, J.; Blustin, A. J.; Branduardi-Raymont, G.; Costantini, E.; Dadina, M.; Detmers, R. G.; Ebrero, J.; Jonker, P. G.; Klein, C.; Kriss, G. A.; Lubinski, P.; Malzac, J.; Mehdipour, M.; Paltani, S.; Pinto, C.; Ponti, G.; Ratti, E. M.; Smith, R. A. N.; Steenbrugge, K. C.; de Vries, C. P. (EDP Sciences, 2011-10)
      Context. Active galactic nuclei (AGN) show a wealth of interesting physical processes, some of which are poorly understood. In a broader context, they play an important role in processes that are far beyond their immediate ...
    • Multiwavelength campaign on Mrk 509 III. The 600 ks RGS spectrum: unravelling the inner region of an AGN 

      Detmers, R.G.; Kaastra, J. S.; Steenbrugge, K. C.; Ebrero, J.; Kriss, G. A.; Arav, Nahum; Behar, E.; Costantini, E.; Branduardi-Raymont, G.; Mehdipour, M.; Bianchi, S.; Cappi, M.; Petrucci, P.; Ponti, G.; Pinto, C.; Ratti, E. M.; Holczer, T. (EDP Sciences, 2011-10)
      We present the results of our 600 ks RGS observation as part of the multiwavelength campaign on Mrk 509. The very high quality of the spectrum allows us to investigate the ionized outflow with an unprecedented accuracy due ...
    • Multiwavelength campaign on Mrk 509 V. Chandra-LETGS observation of the ionized absorber 

      Ebrero, J.; Kriss, G. A.; Kaastra, J. S.; Detmers, R. G.; Steenbrugge, K. C.; Costantini, E.; Arav, Nahum; Bianchi, S.; Cappi, M.; Branduardi-Raymont, G.; Mehdipour, M.; Petrucci, P. O.; Pinto, C.; Ponti, G. (EDP Sciences, 2011-10)
      Context. We present here the results of a 180 ks Chandra-LETGS observation as part of a large multi-wavelength campaign on Mrk 509. Aims. We study the warm absorber in Mrk 509 and use the data from a simultaneous HST-COS ...
    • Multiwavelength campaign on Mrk 509 VI. HST/COS observations of the far-ultraviolet spectrum 

      Kriss, G. A.; Arav, Nahum; Kaastra, J. S.; Ebrero, J.; Pinto, C.; Borguet, B.; Edmonds, Douglas; Costantini, E.; Steenbrugge, K. C.; Detmers, R. G.; Behar, E.; Bianchi, S.; Blustin, A. J.; Branduardi-Raymont, G.; Cappi, M.; Mehdipour, M.; Petrucci, P.; Ponti, G. (EDP Sciences, 2011-10)
      We present medium-resolution (lambda/Delta lambda similar to 20 000) ultraviolet spectra covering the 1155-1760 angstrom spectral range of the Seyfert 1 galaxy Mrk 509 obtained using the Cosmic Origins Spectrograph (COS) ...
    • Multiwavelength campaign on Mrk 509 VII. Relative abundances of the warm absorber 

      Steenbrugge, K. C.; Kaastra, J. S.; Detmers, R. G.; Ebrero, J.; Ponti, G.; Costantini, E.; Kriss, G. A.; Mehdipour, M.; Pinto, C.; Branduardi-Raymont, G.; Behar, E.; Arav, Nahum; Cappi, M.; Bianchi, S.; Petrucci, P. O.; Ratti, E. M.; Holczer, T. (EDP Sciences, 2011-10)
      Context. The study of abundances in the nucleus of active galaxies allows us to investigate the evolution of the abundance by comparing local and higher redshift galaxies. However, the methods used so far have substantial ...
    • Multiwavelength campaign on Mrk 509 VIII. Location of the X-ray absorber 

      Kaastra, J. S.; Detmers R. G.; Mehdipour, M.; Arav, Nahum; Behar, E.; Bianchi, S.; Branduardi-Raymont, G.; Cappi, M.; Costantini, E.; Ebrero, J.; Kriss, G. A.; Paltani, S.; Petrucci, P. O.; Pinto, C.; Ponti, G.; Steenbrugge, K. C.; de Vries, C. P. (EDP Sciences, 2012-03)
      Aims. More than half of all active galactic nuclei show strong photoionised outflows. A major uncertainty in models for these outflows is the distance of the gas to the central black hole. We use the results of a massive ...
    • Multiwavelength campaign on Mrk 509 X. Lower limit on the distance of the absorber from HST COS and STIS spectroscopy 

      Arav, Nahum; Borguet, Benoit C. J.; Kriss, G. A.; Kaastra, J. S.; Behar, E.;Bianchi, S.; Cappi, M.; Costantini, E.; Detmers, R. G.; Ebrero, J.; Mehdipour, M.; Paltani, S.; Petrucci, P. O.; Pinto, C.; Ponti, G.; Steenbrugge, K. C.; de Vries, C. P. (EDP Sciences, 2012-08)
      Aims. Active galactic nuclei (AGN) often show evidence of photoionized outflows. A major uncertainty in models for these outflows is the distance (R) to the gas from the central black hole. In this paper we use the HST/COS ...
    • Multiwavelength campaign on Mrk 509 XI. Reverberation of the Fe K alpha line 

      Ponti, G.; Cappi, M.; Costantini, E.; Bianchi, S.; Kaastra, J. S.; De Marco, B.; Fender, R. P.; Petrucci, P. O.; Kriss, G. A.; Steenbrugge, K. C.; Arav, Nahum; Behar, E.; Branduardi-Raymont, G.; Dadina, M.; Ebrero, J.; Lubinski, P.; Mehdipour, M.; Paltani, S.; Pinto, C.; Tombesi, F. (EDP Sciences, 2013-01)
      Context. We report on a detailed study of the Fe K emission/absorption complex in the nearby, bright Seyfert 1 galaxy Mrk 509. The study is part of an extensive XMM-Newton monitoring consisting of 10 pointings (~60 ks each) ...
    • Multiwavelength campaign on Mrk 509: XVI. Continued HST/COS monitoring of the far-ultraviolet spectrum 

      Kriss, G. A.; Arav, Nahum; Edmonds, Douglas; Ely, J.; Kaastra, J. S.; Bianchi, S.; Cappi, M.; Costantini, E.; Ebrero, J.; Mehdipour, M.; Paltani, S.; Petrucci, P.; Ponti, G. (EDP Sciences, 2019-03-07)
      Aims. To elucidate the location, physical conditions, mass outflow rate, and kinetic luminosity of the outflow from the active nucleus of the Seyfert 1 galaxy Mrk 509, we used coordinated UV and X-ray spectral observations ...
    • Mutation, Witten index, and quiver invariant 

      Kim, Heeyeon; Lee, Seung-Joo; Yi, Piljin (Springer, 2015-07-20)
      We explore Seiberg-like dualities, or mutations, for quiver quantum mechanics in the context of wall-crossing. In contrast to higher dimensions, the 1d Seiberg-duality must be performed with much care. With fixed ...