Browsing by Title Artículos de revistas

Now showing items 4295-4314 of 7549

    • Nature and P-T-t constraints of very low-grade metamorphism in the Triassic-Jurassic basins, Coastal Range, ... 
      Belmar Urbina, Mauricio; Morata Céspedes, Diego (SERVICIO NACIONAL GEOLOGIA MINERVA, 2005-07)
      Triassic-Jurassic volcano-sedimentary sequences in the Coastal Range of central Chile (34 degrees 45/35 degrees 20'S) from the Vichuquen-Tilicura and Hualane-Gualleco basins display metamorphic assemblages indicative of ...
    • Nature and statistical properties of quasar associated absorption systems in the XQ-100 Legacy Survey 
      Perrotta, S.; D'Odorico, V.; Prochaska, J. X.; Cristiani, S.; Cupani, G.; Ellison, S.; López, S.; Becker, G. D.; Berg, T. A. M.; Christensen, L.; Denney, K. D.; Hamann, F.; Paris, I.; Vestergaard, M.; Worseck, G. (2016)
      We statistically study the physical properties of a sample of narrow absorption line (NAL) systems looking for empirical evidences to distinguish between intrinsic and intervening NALs without taking into account any a ...
    • The nature of the cluster of radio sources in GGD 14 
      Gómez, Y.; Rodríguez, L. F.; Garay Brignardello, Guido (The American Astronomical Society, 2002-06-01)
      We present sensitive radio continuum observations at 3.6 and 6 cm made quasi-simultaneously toward the star-forming region GGD 14. The observations reveal the presence of nine extremely compact ( 0>3) and faint radio ...
    • Nature of the gas and dust around 51 Ophiuchi : Modelling continuum and Herschel line observations 
      Thi, W. F.; Ménard, Francois; Meeus, G.; Carmona, A.; Riviere Marichalar, P.; Augereau, J. C.; Kamp, I.; Woitke, P.; Pinte, Christophe; Mendigutía, I.; Eiroa, C.; Montesinos, B.; Britain, S.; Dent, W. (EDP Sciences, 2013)
      Context. Circumstellar disc evolution is paramount for the understanding of planet formation. The gas in protoplanetary discs large program (GASPS) aims at determining the circumstellar gas and solid mass around ∼250 ...
    • The nature of the peculiar Virgo Cluster galaxies NGC 4064 and NGC 4424 
      Cortés, Juan R.; Kenney, Jeffrey D. P.; Hardy, Eduardo (UNIV CHICAGO PRESS, 2006-02)
      Using extensive kinematical and morphological data on two Virgo Cluster galaxies undergoing strong nuclear star formation, we show that ram pressure stripping and gravitational interactions can act together on galaxies ...
    • The Nature of the Radio Sources within the Cepheus A Star-forming Region 
      Garay Brignardello, Guido; Ramírez, Solange; Rodríguez, Luis F.; Curiel, Salvador; Torelles, José M. (1996-03-01)
      We present multifrequency, matching-beam, VLA radio continuum observations of the Cep A East radio source, known to consist of 16 compact ( 1") components clustered within a 25" radius region, most of which are aligned in ...
    • NautiLOD: A Formal Language for the Web of Data Graph 
      Fionda, Valeria; Pirró, Giuseppe; Gutiérrez Gallardo, Claudio (ACM, 2015)
      The Web of Linked Data is a huge graph of distributed and interlinked datasources fueled by structured information. This new environment calls for formal languages and tools to automatize navigation across datasources ...
    • Navigating in a Graph by Aid of Its Spanning Tree 
      Dragan, Feodor F.; Matamala Vásquez, Martín (2008)
      Let G = (V,E) be a graph and T be a spanning tree of G. We consider the following strategy in advancing in G from a vertex x towards a target vertex y: from a current vertex z (initially, z = x), unless z = y, go to a ...
    • Near infrared variability of obscured and unobscured X-Ray selected AGN in the Cosmos field 
      Sánchez, P.; Lira Teillery, Paulina; Cartier Ugarte, Regis; Pérez, V.; Miranda, N.; Yovaniniz, C.; Arévalo, P.; Milvang Jensen, B.; Fynbo, J.; Dunlop, J.; Coppi, P.; Marchesi, S. (IOP Publishing Ltd., 2017)
      We present our statistical study of near-infrared (NIR) variability of X-ray-selected active galactic nuclei (AGNs) in the COSMOS field, using UltraVISTA data. This is the largest sample of AGN light curves in YJHK(s) ...
    • Near neighbor searching with K nearest references 
      Chávez, E.; Graff, M.; Navarro, Gonzalo; Téllez, E. S. (Elsevier, 2015)
      Proximity searching is the problem of retrieving,from a given database, those objects closest to a query.To avoid exhaustive searching,data structures called indexes are builton the database prior to serving queries.The ...
    • Near-Field Effects of Earthquake Rupture Velocity Into Tsunami Runup Heights 
      Riquelme, S; Schwarze, H; Fuentes, M; Campos, J (Blackwell Publishing Ltd, 2020)
    • Near-Field Spectra of Large Earthquakes 
      Madariaga, Raul; Ruiz Tapia, Sergio; Rivera, Efrain; Leyton, Felipe; Baez, Juan Carlos (Birkhauser Verlag AG, 2019)
      © 2018, Springer Nature Switzerland AG.We have studied the spectra of large subduction earthquakes in Chile at short epicentral distances. In this work, we concentrate on the Mw 8.2, Iquique earthquake of 1 April 2014. For ...
    • Near-infrared Adaptive Optics Imaging of Infrared Luminous Galaxies 
      Randriamanakoto, Z.; Escala Astorquiza, Andrés; Väisänen, P.; Kankare, E.; Kotilainen, J.; Mattila, S.; Ryder, S. (The American Astronomical Society, 2013-10-01)
      We have established a relation between the brightest super star cluster (SSC) magnitude in a galaxy and the host star formation rate (SFR) for the first time in the near-infrared (NIR). The data come from a statistical ...
    • Near-infrared imaging and spectroscopy of the nuclear region of the disturbed Virgo cluster spiral NGC4438 
      Pérez, Sebastián; Casassus Montero, Simón; Cortés, Juan R.; Kenney, Jeffrey D. P. (2009)
      We present near-infrared (NIR) Very Large Telescope (VLT) Infrared Spectrometer and Array Camera (ISAAC) imaging and spectroscopy of the peculiar Virgo galaxy NGC4438, whose nucleus has been classified as a low-ionization ...
    • Near-infrared imaging polarimetry of HD142527 
      Canovas, H.; Ménard, Francois; Hales, A.; Jordán, A.; Schreiber, M. R.; Casassus Farran, Simón; Gledhill, T. M.; Pinte, Christophe (EDP Sciences, 2013)
      Context. HD142527 is a pre-transition disk with strong evidence for ongoing planet formation. Recent observations show a disrupted disk with spiral arms, a dust-depleted inner cavity and the possible presence of gas streams ...
    • Near-infrared integral-field spectra of the planet/brown dwarf companion AB Pictoris b 
      Bonnefoy, M.; Chauvin, G.; Rojo, P.; Allard, F.; Lagrange, Anne Marie; Homeier, D.; Dumas, C.; Beuzit, J.-L. (EDP Sciences, 2010)
      Context. We have already imaged a co-moving companion at a projected separation of ∼260 AU from the young star AB Pic A. Evolutionary model predictions based on JHK photometry of AB Pic b suggest a mass of ∼13−14 MJup, ...
    • Near-infrared photometry of isolated spirals with and without an AGN 
      Márquez, I.; Durret, F.; González Delgado, R. M.; Marrero, I.; Masegosa, J.; Maza Sancho, José; Moles, M.; Pérez, E.; Roth, M. (E D P SCIENCES, 7, AVE DU HOGGAR, PARC D ACTIVITES COURTABOEUF, 1999-11)
      We present infrared imaging data in the J and K0 bands obtained for 18 active spiral galaxies, together with 11 non active galaxies taken as a control sample. All of them were chosen to satisfy well de ned isolation ...
    • Near-infrared spectroscopic observations of high redshift C I absorbers 
      Zou, Siwei; Petitjean, Patrick; Noterdaeme, Pasquier; Ledoux, Cédric; Krogager, J. K.; Fathivavsari, H.; Srianand, R.; López, S. (EDP Sciences, 2018)
      We study a sample of 17 $z>1.5$ C~{\sc i} absorbers observed with the ESO-VLT spectrograph X-SHOOTER. We derive metallicities, depletion onto dust, extinction by dust and analyse the absorption from Mg~{\sc ii}, Mg~{\sc ...
    • A near-infrared spectroscopic survey of K-selected galaxies at z similar to 2.3: Redshifts and implications ... 
      Kriek, Mariska; van Dokkum, Pieter; Franx, Marijn; Illingworth, Garth D.; Marchesini, Danilo; Quadri, Ryan; Rudnick, Gregory; Taylor, Edward N.; Schreiber, Natascha M. Foerster; Gawiser, Eric; Labbé, Ivo; Lira Teillery, Paulina; Wuyts, Stijn (UNIV CHICAGO PRESS, 2008-04-10)
      Using the Gemini Near-Infrared Spectrograph (GNIRS), we have completed a near-infrared spectroscopic survey for K-bright galaxies at z similar to 2.3 selected from the MUSYC survey. We derived spectroscopic redshifts from ...
    • Near-optimal online multiselection in internal and external memory 
      Barbay, Jérémy; Gupta, Ankur; Satti, Srinivasa Rao; Sorenson, Jon (Elsevier, 2016)
      We introduce an online version of the multiselection problem, in which q selection queries are requested on an unsorted array of nelements. We provide the first online algorithm that is 1-competitive with the offline ...