Now showing items 12150-12169 of 19209

    • Nuclear discs as clocks for the assembly history of early-type galaxies: the case of NGC 4458 

      Sarzi, M.; Ledo, H.~R.; Coccato, L.; Corsini, E.~M.; Dotti, M.; Khochfar, S.; Maraston, C.; Morelli, L.; Pizzella, A. (2016-04-01)
      Approximately 20 per cent of early-type galaxies host small nuclear stellar discs that are tens to a few hundred parsecs in size. Such discs are expected to be easily disrupted during major galactic encounters, hence their ...
    • A nuclear grand-design spiral within the normal disc spiral of NGC 5248 

      Laine, S.; Knapen, J.; Perez-Ramirez, D.; Doyon, R.; Nadeau, D. (1999-01)
      We report the discovery of trailing grand-design nuclear spiral structure in the spiral galaxy NGC 5248. Two tightly-wound red spiral arms, with widths less than 1 arcsec (~ 75 pc), emanate at 1 arcsec outside the quiescent ...
    • Nuclear level density and the determination of thermonuclear rates for astrophysics 

      Rauscher, T.; Thielemann, Friedrich-Karl; Kratz, K.L. (1997-09)
      The prediction of cross sections for nuclei far off stability is crucial in the field of nuclear astrophysics. In recent calculations the nuclear level density-as an important ingredient to the statistical model ...
    • Nuclear medicine 

      Major, Vicki; Griffiths, Marc (Churchill Livingstone, 2009)
      Nuclear Medicine is concerned with providing diagnostic information about patients following the administration of a radioactive product. The patient is imaged using a Gamma Camera. Images are produced of the distribution ...
    • Nuclear partition functions at temperatures exceeding 10(10) K 

      Rauscher, T. (2003-08)
      Nuclear partition functions were calculated for a grid of temperatures from 1.2 x 10(10) to 2.75 x 10(11) K (1 MeV less than or equal to kT less than or equal to 24 MeV) within a Fermi-gas approach, including all nuclides ...
    • Nuclear physics : A key ingredient in astrophysical modeling 

      Thielemann, Friedrich-Karl; Argast, D.; Brachwitz, F.; Fisker, J. L.; Froehlich, Carla; Hirschi, R.; Kolbe, E.; Mocelj, D.; Rauscher, T. (2005-04-18)
      Nuclear physics is a basic ingredient in a large number of energetic astrophysical environments which are characterized by sufficient temperatures and densities to permit scattering events among particles, leading to nuclear ...
    • Nuclear physics for the Re/Os clock 

      Mosconi, M.; Heil, M.; Kaeppeler, F.; Plag, R.; Mengoni, A.; Fujii, K.; Domingo-Pardo, C.; Aerts, G.; Terlizzi, R.; Gallino, R.; Abbondanno, U.; Alvarez, H.; Alvarez-Velarde, F.; Andriamonje, S.; Andrzejewski, J.; Assimakopoulos, P.; Audouin, L.; Badurek, G.; Baumann, P.; Becvar, F.; Berthoumieux, E.; Calvino, F.; Calviani, M.; Cano-Ott, D.; Capote, R.; Carrapico, C.; Cennini, P.; Chepel, V.; Colonna, N.; Cortes, G.; Couture, A.; Cox, J.; Dahlfors, M.; David, S.; Dillmann, I.; Dridi, W.; Duran, I.; Eleftheriadis, C.; Embid-Segura, M.; Ferrant, L.; Ferrari, A.; Ferreira-Marques, R.; Furman, W.; Goncalves, I.; Gonzalez-Romero, E.; Gramegna, F.; Guerrero, C.; Gunsing, F.; Haas, B.; Rauscher, T.; n TOF Collaboration (2008-01)
      Dating the age of the universe by the beta-decay of (187)Re (t(1/2) = 41.2 Gyr) requires the accurate assessment of the s-process reaction flow. The daughter nucleus (187)Os as well as its immediate s-only neighbor (186)Os ...
    • Nuclear physics issues of the r-process 

      Thielemann, Friedrich-Karl; Kolbe, E.; Martinez-Pinedo, G.; Panov, I.; Rauscher, T.; Kratz, K.L.; Pfeiffer, B.; Rosswog, S. (World Scientific Publishing, 2003)
      The present paper aims at understanding r-process nucleosynthesis by addressing the nuclear physics involved, the necessary environment conditions in the (stellar) production sites, and the observational constraints. We ...
    • Nuclear Properties of a Sample of Nearby Spiral Galaxies from Hubble Space Telescope STIS Imaging 

      Scarlata, C.; Stiavelli, M.; Hughes, M.A.; Axon, D.J.; Alonso-Herrero, A.; Atkinson, J.; Batcheldor, D.; Binney, J.; Capetti, A.; Carollo, C.M.; Dressel, L.; Gerssen, J.; Macchetto, F.D.; Maciejewski, W.; Marconi, A.; Merrifield, M.; Ruiz, M.; Sparks, W.; Tsvetanov, Z.; van der Marel, R. (2004)
    • Nuclear properties of nearby spiral galaxies from Hubble Space Telescope NICMOS imaging and STIS spectroscopy 

      Hughes, M.A.; Axon, D.J.; Atkinson, J.; Alonso-Herrero, A.; Scarlata, C.; Marconi, A.; Batcheldor, D.; Binney, J.; Capetti, A.; Carollo, C.M.; Dressel, L.; Macchetto, F.D.; Maciejewski, W.; Merrifield, M.; Ruiz, M.; Sparks, W.; Stiavelli, M.; Tsvetanov, Z.; Gerssen, J. (2005)
    • The nuclear ring in the unbarred galaxy NGC 278: Result of a minor merger 

      Knapen, J.; Whyte, L.F.; de Blok, W.J.G.; van der Hulst, J.M. (2004-08)
    • Nuclear star formation in the hot-spot galaxy HGC 2903 

      Alonso-Herrero, A.; Ryder, S.D.; Knapen, J. (2000-06)
      Circumnuclear regions (CNR) of enhanced star formation (SF) in disk galaxies are usually associated with the presence of stellar bars. Since bars are believed to be one of the most effective mechanisms for transporting ...
    • Nuclear star formation in the hotspot galaxy NGC 2903 

      Alonso-Herrero, A.; Ryder, S.D.; Knapen, J. (2001)
    • The nuclear torus in the active galaxy NGC 1068 

      Young, S.; Packham, C.; Hough, J.; Efstathiou, A. (1996)
      We present near-infrared polarized images of the active galaxy NGC 1068. At these wavelengths, the counter-cone is observed in scattered light. At H (1.64 μm) we detect an absorption band across the counter-cone, which we ...
    • The Nucleic Acids Protocols Handbook 

      Rapley, Ralph (Humana Press, 2000)
      The Nucleic Acid Protocols Handbook is today's most comprehensive up-to-date treasury of all the key molecular biology methods-ranging from DNA extraction to gene localization in situ-needed to function effectively in the ...
    • Nucleosynthesis and early chemical evolution in galaxies 

      Tsangarides, S.; Arnone, E.; Ryan, Sean G. (2003)
      Nucleosynthesis and galactic chemical evolution are inter-linked topics that merge various fields in astronomy and physics. Speakers at the RAS discussion meeting of January 2003 combined theory and observation in understanding ...
    • Nucleosynthesis and stellar evolution 

      Thielemann, Friedrich-Karl; Argast, D.; Brachwitz, F.; Martinez-Pinedo, G.; Rauscher, T.; Liebendoerfer, M.; Mezzacappa, A.; Hoflich, P.; Nomoto, K. (2002)
      Two of the basic building blocks of galaxies are stars and the interstellar medium. The evolution of the abundance composition in the latter and especially the enrichment of heavy elements as a function of space and time ...
    • Nucleosynthesis at the proton drip line - a challenge for nuclear physics 

      Schatz, H.; Bildsten, L.; Gorres, J.; Rauscher, T.; Thielemann, Friedrich-Karl; Wiescher, Michael (American Institute of Physics, 1998)
      The rp-process in X-ray bursts is investigated using a complete and updated nuclear reaction network from H to Sr, that is coupled to a one dimensional, one zone X-ray burst model. In particular we consider 2p-capture ...
    • Nucleosynthesis in core-collapse supernova explosions triggered by a quark-hadron phase transition 

      Nishimura, Nobuya; Fischer, Tobias; Thielemann, Friedrich-Karl; Froehlich, Carla; Hempel, Matthias; Kaeppeli, Roger; Martinez-Pinedo, Gabriel; Rauscher, T.; Sagert, Irina; Winteler, Christian (2012-10-10)
      We explore heavy-element nucleosynthesis in the explosion of massive stars that are triggered by a quark-hadron phase transition during the early post-bounce phase of core-collapse supernovae. The present study is based ...
    • Nucleosynthesis in massive stars revisited 

      Rauscher, T.; Heger, A.; Hoffman, R. D.; Woosley, S.E. (2001-05-21)
      We have performed the first calculations to follow the evolution of all stable nuclei and their radioactive progenitors in a finely-zoned stellar model computed from the onset of central hydrogen burning through explosion ...