Mostrando ítems 4317-4329 de 4329

    • Young star clusters immersed in intermediate-age fields in the Large Magellanic Cloud bar 

      Piatti, Andres E.; Geisler, Doug; Bica, Eduardo Luiz Damiani; Claria Olmedo, Juan Jose (2003) [Artículo de periódico]
      We present Washington System photometry for 11 star clusters immersed in the north-west part of the Large Magellanic Cloud (LMC) bar, centred on the intermediate-age clusters NGC 1865 and SL 244. The fields are heavily ...
    • Young star clusters in the Large Magellanic Cloud : NGC 1805 and 1818 

      Johnson, Rachel A.; Beaulieu, Sylvie F.; Gilmore, Gerard Fitzgerald; Hurley, Jarrod; Santiago, Basilio Xavier; Tanvir, Nial R.; Elson, Rebecca A.W. (2001) [Artículo de periódico]
      We present colour-magnitude diagrams for two rich (~~104 M̛) Large Magellanic Cloud star clusters with ages ~~ 107 yr, constructed from optical and near-infrared data obtained with the Hubble Space Telescope. These data ...
    • Young (α/Fe)-enhanced stars discovered by CoRoT and APOGEE : what is their origin? 

      Chiappini, C.C.M.; Anders, Friedrich; Rodrigues, Thaise da Silva; Miglio, Andrea; Montalbán, Josefina; Mosser, Benoît; Girardi, Leo Alberto; Valentini, Marica; Noels, Arlette; Morel , Thierry; Minchev, Ivan; Steinmetz, M.; Santiago, Basilio Xavier; Schultheis, Mathias; Martig, Marie; Costa, Luiz N. da; Maia, Marcio Antonio Geimba; Allende Prieto, Carlos; Assis Peralta, R. de; Hekker, Saskia; Themeßl, Nathalie; Kallinger, Thomas; Garcia, Rafael A.; Mathur, Savita; Baudin, Frederic; Beers, T.C.; Cunha, Katia; Harding, Paul; Holtzman, J.A.; Majewski, Steven Raymond; Mészáros, S.; Nidever, D.L.; Pan, K.; Schiavon, Ricardo P.; Shetrone, M.; Schneider, D.P.; Stassun, Keivan G. (2015) [Artículo de periódico]
      We report the discovery of a group of apparently young CoRoT red-giant stars exhibiting enhanced [ /Fe] abundance ratios (as determined from APOGEE spectra) with respect to solar values. Their existence is not explained ...
    • Yukawa particles in a confining potential 

      Girotto, Matheus; Santos, Alexandre Pereira dos; Colla, Thiago Escobar; Levin, Yan (2014) [Artículo de periódico]
      We study the density distribution of repulsive Yukawa particles confined by an external potential. In the weak coupling limit, we show that the mean-field theory is able to accurately account for the particle distribution. ...
    • Zig-zag networks of self-excited periodic oscillations in a tunnel diode and a fiber-ring laser 

      Francke Sandoval, Ricardo Eugenio; Poschel, Thorsten; Gallas, Jason Alfredo Carlson (2013) [Artículo de periódico]
      We report numerical evidence showing that periodic oscillations can produce unexpected andwide-ranging zigzag parameter networks embedded in chaos in the control space of nonlinear systems. Such networks interconnect ...
    • Zircon U-Pb geochronology, Sm-Nd and Pb-Pb isotope systematics of Ediacaran post-collisional high-silica Acampamento Velho volcanism at the Tupanci area, NW of the Sul-Rio-Grandense Shield, Brazil 

      Sommer, Carlos Augusto; Leitzke, Felipe Padilha; Lima, Evandro Fernandes de; Barreto, Carla Joana Santos; Lafon, Jean Michel; Matté, Vinicius; Philipp, Ruy Paulo; Conceição, Rommulo Vieira; Basei, Miguel Angelo Stipp (2017) [Artículo de periódico]
      We present new U-Pb zircon ages and Sm-Nd-Pb isotopic data for volcanic and hypabyssal acid rocks from the northernmost exposure of the Acampamento Velho Formation in the NW portion of the Sul-Rio-Grandense Shield, Brazil. ...
    • Zooming into local active galactic nuclei : the power of combining SDSS-IV MaNGA with higher resolution integral field unit observations 

      Wylezalek, Dominika; Schnorr Müller, Allan; Zakamska, Nadia L.; Storchi-Bergmann, Thaisa; Greene, Jenny E.; Muller-Sanchez, Francisco; Kelly, Michael; Liu, Guilin; Law, David R.; Barrera-Ballesteros, Jorge; Riffel, Rogemar André; Thomas, D. (2017) [Artículo de periódico]
      Ionized gas outflows driven by active galactic nuclei (AGN) are ubiquitous in high-luminosity AGN with outflow speeds apparently correlated with the total bolometric luminosity of the AGN. This empirical relation and ...
    • Αβ-crystallin and laminin-332 are prognostic markers for triple negative breast cancers in a brazilian series 

      Graudenz, Márcia Silveira; Uchôa, Diego de Mendonça; Cadore, Ermani; Giacomazzi, Juliana; Callegari-Jacques, Sidia Maria (2019) [Artículo de periódico]
      Purpose: Association between increased αβ-crystallin (ABC) and abnormal LN332 (LN332) expression in triple negative (TNBC) and basal-like (BLBC) breast cancers has been suggested recently. This study aims to evaluate ABC ...
    • Λc+ production in Pb–Pb collisions at √sNN=5.02 TeV 

      Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2019) [Artículo de periódico]
      A measurement of the production of prompt Λc+baryons in Pb–Pb collisions at TeV with the ALICE detector at the LHC is reported. The Λc+ and Λ-c- were reconstructed at midrapidity (|y|<0.5) via the hadronic decay channel ...
    • Λ+c production in pp collisions at √s = 7 TeV and in p-Pb collisions at √sNN = 5.02 TeV 

      Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2018) [Artículo de periódico]
      The pT-di erential production cross section of prompt +c charmed baryons was measured with the ALICE detector at the Large Hadron Collider (LHC) in pp collisions at p s = 7TeV and in p-Pb collisions at p sNN = 5:02TeV at ...
    • π0 and η meson production in proton-proton collisions at √s=8 TeV 

      Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2018) [Artículo de periódico]
      An invariant differential cross section measurement of inclusive π0 and η meson production atmid-rapidity in pp collisions at √ s = 8 TeV was carried out by the ALICE experiment at the LHC. The spectra of π0 and η mesons ...
    • ϒ suppression at forward rapidity in Pb–Pb collisions at √sNN = 5.02 TeV 

      Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2019) [Artículo de periódico]
      Inclusive ϒ(1S)and ϒ(2S)production have been measured in Pb–Pb collisions at the centre-of-mass energy per nucleon–nucleon pair √sNN=5.02TeV, using the ALICE detector at the CERN LHC. The ϒmesons are reconstructed in the ...
    • Φ meson production at forward rapidity in Pb–Pb collisions at √sNN = 2.76 TeV 

      Acharya, Shreyasi; Gay Ducati, Maria Beatriz; Pereira, Luis Gustavo; Pezzi, Rafael Peretti; ALICE Collaboration (2018) [Artículo de periódico]
      φ meson measurements provide insight into strangeness production, which is one of the key observables for the hot medium formed in high-energy heavy-ion collisions. ALICE measured φ production through its decay in muon ...