Navegação Ciências Exatas e da Terra por Título

Resultados 2345-2364 de 5973

    • HST NICMOS photometry of the reddened bulge globular clusters NGC 6528, Terzan 5, Liller 1, UKS 1 and Terzan 4 

      Ortolani, Sergio; Barbuy, Beatriz; Bica, Eduardo Luiz Damiani; Renzini, Alvio; Zoccali, Manuela; Rich, Robert Michael; Cassisi, Santi (2001) [Artigo de periódico]
      We present results from NICMOS Hubble Space Telescope observations of the reddened bulge globular clusters NGC 6528, Terzan 5, Liller 1, UKS 1 and Terzan 4, obtained through the filters F110W (1.1 μm) and F160W (1.6 μm) ...

    • HST observations of Terzan 1 : a second parameter globular cluster in the galactic bulge 

      Ortolani, Sergio; Barbuy, Beatriz; Bica, Eduardo Luiz Damiani; Renzini, Alvio; Marconi, Gianni; Gilmozzi, Roberto (1999) [Artigo de periódico]
      Hubble Space Telescope observations in the F555W and F814W bands are presented of the bulge globular cluster Terzan 1. This highly obscured cluster has the smallest projected distance to the Galactic center among all known ...

    • Hst observations of the field star population in the large magellanic cloud 

      Elson, Rebecca A.W.; Gilmore, Gerard Fitzgerald; Santiago, Basilio Xavier (1997) [Artigo de periódico]
      We present V and I photometry, obtained with the Hubble Space Telescope, for ~ 15 800 stars in a field in the inner disc of the Large Magellanic Cloud. We confirm previous results indicating that an intense star formation ...

    • HST observations of the pulsating white dwarf GD 358 

      Castanheira, Bárbara Garcia; Nitta, Atsuko; Kepler, Souza Oliveira; Winget, Donald Earl; Koester, Detlev (2005) [Artigo de periódico]
      We used time-resolved ultraviolet spectroscopy obtained with the FOS and STIS spectrographs of the Hubble Space Telescope (HST), together with archival IUE observations to measure the effective temperature (Teff), surface ...

    • HST/WFPC2 and VLT/ISAAC observations of proplyds in the giant H II region NGC 3603 

      Brandner, Wolfgang; Grebel, Eva K.; Chu, You-Hua; Dottori, Horacio Alberto; Brandl, Bernhard; Richling, Sabine; Yorke, Harold W.; Points, Sean D.; Zinnecker, Hans (2000) [Artigo de periódico]
      We report the discovery of three proplyd-like structures in the giant H II region NGC 3603. The emission nebulae are clearly resolved in narrowband and broadband HST/WFPC2 observations in the optical and broadband VLT/ISAAC ...

    • Hubble Space Telescope faint object camera spectroscopy of the narrow-line region of NGC 4151. I. Gas kinematics 

      Winge, Claudia; Axon, David J.; Macchetto, Ferdinando Duccio; Capetti, A.; Marconi, A. (1999) [Artigo de periódico]
      We present the results from a detailed kinematic analysis of both ground-based, and Hubble Space Telescope (HST )/Faint Object Camera long-slit spectroscopy at subarcsecond spatial resolution of the narrow-line region (NLR) ...

    • Hubble Space Telescope imaging of the circinus galaxy 

      Wilson, Andrew S.; Shopbell, P.L.; Simpson, Chris; Storchi-Bergmann, Thaisa; Barbosa, Fausto Kuhn Berenguer; Ward, Martin John (2000) [Artigo de periódico]
      We present a Hubble Space Telescope imaging study of the nearby (4 Mpc distant) Circinus galaxy, which contains the nearest type 2 Seyfert nucleus and prominent circumnuclear star formation. Images have been obtained in ...

    • Hubble Space Telescope observations of extended [OIII]λ5007 emission in nearby QSO2s : new constraints on AGN host galaxy interaction 

      Fischer, Travis C.; Kraemer, S. B.; Schmitt, Henrique Roberto; Micchi, L. F. Longo; Crenshaw, Daniel Michael; Revalski, Mitchell; Vestergaard, Marianne; Elvis, Martin; Gaskell, C.M.; Hamann, Fred; Ho, Luis C.; Hutchings, John B.; Mushotzky, Richard; Netzer, Hagai; Storchi-Bergmann, Thaisa; Straughn, Amber N.; Turner, T.J.; Ward, Martin John (2018) [Artigo de periódico]
      We present a Hubble Space Telescope survey of extended [O III] λ5007 emission for a sample of 12 nearby (z < 0.12), luminous Type 2 quasars (QSO2s), which we use to measure the extent and kinematics of their AGNionized ...

    • Hubble Space Telescope observations of [O III] emission in nearby QSO2s : physical properties of the ionized outflows 

      Falcão, Anna Luiza Trindade; Kraemer, S. B.; Fischer, Travis C.; Crenshaw, Daniel Michael; Revalski, Mitchell; Schmitt, Henrique Roberto; Vestergaard, Marianne; Elvis, Martin; Gaskell, C.M.; Hamann, Fred; Ho, Luis C.; Hutchings, John B.; Mushotzky, Richard; Netzer, Hagai; Storchi-Bergmann, Thaisa; Turner, T.J.; Ward, M.J. (2021) [Artigo de periódico]
      We use Hubble Space Telescope/Space Telescope Imaging Spectrograph long-slit G430M and G750M spectra to analyse the extended [O iii] λ5007 emission in a sample of 12 nearby (z < 0.12) luminous (Lbol > 1.6 × 1045 erg s−1) ...

    • Hybrid polythiophene–clay exfoliated nanocomposites for ultracapacitor devices 

      Aradilla, David; Azambuja, Denise Schermann; Estrany, Francesc; Casas, María T.; Ferreira, Carlos Arthur; Alemán, Carlos (2012) [Artigo de periódico]
      Exfoliated nanocomposites of poly(3,4-ethylenedioxythiophene) (PEDOT) and montmorillonite (MMT) have been prepared by in situ anodic polymerization, concentrations of clay ranging from 5% w/w to 50% w/w being included in ...

    • Hydration and anomalous solubility of the Bell-Lavis model as solvent 

      Szortyka, Marcia Martins; Fiore, Carlos Eduardo; Barbosa, Marcia Cristina Bernardes; Henriques, Vera Bohomoletz (2012) [Artigo de periódico]
      We address the investigation of the solvation properties of the minimal orientational model for water originally proposed by [Bell and Lavis, J. Phys. A 3, 568 (1970)]. The model presents two liquid phases separated by a ...

    • Hydrodynamics and suspended sediment transport in the Camboriú Estuary - Brazil : prejetty conditions 

      Toldo Junior, Elirio Ernestino; Siegle, Eduardo; Schettini, Carlos Augusto França; Klein, Antonio Henrique da Fontoura (2009) [Artigo de periódico]
      As trocas de água e materiais através das desembocaduras de estuários são de difícil quantificação e são de fundamental importância para o entendimento do funcionamento de estuários e da zona costeira. A hidrodinâmica e ...

    • Hydrogels containing redispersible spray-dried melatonin-loaded nanocapsules : a formulation for transdermal-controlled delivery 

      Hoffmeister, Cristiane Rodrigues Drago; Durli, Taís Lusa; Schaffazick, Scheila Rezende; Raffin, Renata Platcheck; Bender, Eduardo André; Beck, Ruy Carlos Ruver; Pohlmann, Adriana Raffin; Guterres, Silvia Stanisçuaski (2012) [Artigo de periódico]
      The aim of the present study was to develop a transdermal system for controlled delivery of melatonin combining three strategies: nanoencapsulation of melatonin, drying of melatonin-loaded nanocapsules, and incorporation ...

    • Hydrogen and deuterium incorporation and transport in hafnium-based dielectric films on silicon 

      Pezzi, Rafael Peretti; Miotti, Leonardo; Bastos, Karen Paz; Soares, Gabriel Vieira; Driemeier, Carlos Eduardo; Baumvol, Israel Jacob Rabin; Punchaipetch, P.; Pant, Gaurang; Gnade, Bruce E.; Wallace, Robert M.; Rotondaro, Antonio L.P.; Visokay, J.M.; Chambers, Jim J.; Colombo, Luigi (2004) [Artigo de periódico]
      Hydrogen and deuterium incorporation into nitrided and non-nitrided hafnium silicate films on Si during thermal annealing in 1H- and 2H-containing atmospheres was investigated. 1H profiling was accessed by means of nuclear ...

    • Hydrogen incorporation dependence on the thermal growth route in dielectric/SiC structures 

      Corrêa, Silma Alberton; Soares, Gabriel Vieira; Tanner, Philip; Han, Jisheng; Dimitrijev, Sima; Stedile, Fernanda Chiarello (2013) [Artigo de periódico]
      The incorporation of hydrogen in dielectric/SiC structures and Pt/dielectric/SiC structures whose dielectric films were thermally grown in O 2 , NO, or O 2 followed by annealing in NO was investigated. The amount and the ...

    • Hydrogen trapping in oxigen-deficient hafnium silicates 

      Fonseca, Leonardo R. C.; Xavier Jr., A. L.; Ribeiro Jr., Marcelo; Driemeier, Carlos Eduardo; Baumvol, Israel Jacob Rabin (2007) [Artigo de periódico]
      Isotopic substitution, nuclear reaction analysis, and x-ray photoelectron spectroscopy were employed to show that oxygen-deficient hafnium (Hf) silicates trap hydrogen atoms. Based on this experimental observation, we used ...

    • Hyperchaotic dynamics for light polarization in a laser diode 

      Bonatto, Cristian (2018) [Artigo de periódico]
      It is shown that a highly randomlike behavior of light polarization states in the output of a free-running laser diode, covering the whole Poincar´e sphere, arises as a result from a fully deterministic nonlinear process, ...

    • Hypersurfaces with constant mean curvature in the complex hyperbolic space 

      Fornari, Suzana; Ripoll, Jaime Bruck; Frensel, Katia Rosenvald (1993) [Artigo de periódico]
      A classical theorem of A. D. Alexandrov characterized round spheres is extended to the complex hyperbolic space CH2 of constant holomorphic sectional curvature. A detailed description of the horospheres and equidistant ...

    • Hypersurfaces with constant mean curvature in the complex hyperbolic space 

      Fornari, Suzana; Frensel, Katia Rosenvald; Ripoll, Jaime Bruck (1991) [Artigo de periódico]
      A classsical theorem of A. D. Alexandrov characterizing round spheres is extended to the complex hyperbolic space CH2 of constant holomorphic sectional curvature. A detailed description of the horospheres and equidistant ...

    • Hypersurfaces with positive principal curvatures in symmetric spaces 

      Ripoll, Jaime Bruck (1998) [Artigo de periódico]