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EDP Sciences |
Documentos disponibles de esta editorial (42)
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Díaz García, Elena ; Rodriguez, A. ; Domínguez-Adame Acosta, Francisco ; Malyshev, Andrey | EDP Sciences | 2005-12Optical spectroscopy usually fails in detecting localization-delocalization (Anderson) transitions. We report on an anomalous behavior of the absorption spectrum in a one-dimensional lattice with long-range correlated diagonal disorder, having a[...]texto impreso
Montes Gutiérrez, David ; Castro Rubio, Elisa de ; Fernández Figueroa, María José ; Cornide Castro-Piñeiro, Manuel | EDP Sciences | 1995-12We present new spectroscopic observations in the Ca II H & K line region for a sample of 28 chromospherically active binary systems (RS CVn and BY Dra classes), with different activity levels. By using the spectral subtraction technique (subtrac[...]texto impreso
Alonso, O. ; Zamorano Calvo, Jaime ; Rego Fernández, Manuel ; Gallego Maestro, Jesús | EDP Sciences | 1995-10A full set of algorithms for the automatic analysis of low-resolution objective-prism spectra has been developed with the aim of finding new emission-line galaxies (ELGs) candidates from the Universidad Complutense de Madrid (UCM) survey prism p[...]texto impreso
The physical possibility of neutron fibres, proposed in a previous paper, is reviewed briefly. Further possibilities and results are reported specifically about : (a) magnetized fibres, (b) propagation modes in homogeneous circular fibres (upper[...]texto impreso
Antoranz Canales, Pedro ; Barrio Uña, Juan Abel ; Contreras González, José Luis ; Fonseca González, Mª Victoria ; Miranda Pantoja, José Miguel ; Scapin, Valeria | EDP Sciences | 2012-03We report on the detection of very-high energy (VHE, E > 100 GeV) gamma-ray emission from NGC 1275, the central radio galaxy of the Perseus cluster of galaxies. The source has been detected by the MAGIC telescopes with a statistical significanc[...]texto impreso
We present a study of the Earth's rotational motion in terms of the Earth Orientation Parameters (EOP) of the new paradigm that is recommended by the IAU 2000 resolutions to transform between the celestial and terrestrial reference systems. This[...]texto impreso
Gorgas García, Francisco Javier ; Cardiel López, Nicolás ; Pedraz, S. ; González, J. J. | EDP Sciences | 1999-10Empirical fitting functions, describing the behaviour of the ?4000 Å break, D_4000, in terms of effective temperature, metallicity and surface gravity, are presented. For this purpose, the break has been measured in 392 stars from the Lick/IDS L[...]texto impreso
In this paper, information theoretic methodology for system modeling is applied to investigate the probability density function of the busy period in M/G/1 vacation models operating under the N-, T- and D-policies. The information about the dens[...]texto impreso
Maieves, Helayne Aparecida ; Hoffmann Ribani, Rosemary ; Morales Gómez, Patricia ; Sánchez Mata, María de Cortes | EDP Sciences | 2015Native to Asia, Hovenia dulcis Thunb. (Rhamnaceae), known as Japanese grape, is also found in central and southern America, southern Europe and North Africa. The fruit is a small capsule, attached to peduncle or pseudofruit, which, when mature, [...]texto impreso
The total energy E(t) in a fluid of inelastic particles is dissipated through inelastic collisions. When such systems are prepared in a homogeneous initial state and evolve undriven, E(t) decays initially as t^(?2) ~ exp[?2?? ] (known as Haff's [...]texto impreso
Matallanas Peñas, Beatriz ; Ochando González, María Dolores ; Callejas Hervás, Carmen | EDP Sciences | 2016The white-clawed crayfish is endemic to western and southern Europe and its population has dramatically decreased in the last few decades. The latest reports on this species have shown that the genetic variability of Spanish populations displays[...]texto impreso
Ustamujic, S. ; Orlando, S. ; Bonito, R. ; Miceli, M. ; Gómez de Castro, Ana Inés ; López Santiago, J. | EDP Sciences | 2016Context. X-ray observations of protostellar jets show evidence of strong shocks heating the plasma up to temperatures of a few million degrees. In some cases, the shocked features appear to be stationary. They are interpreted as shock diamonds. [...]texto impreso
The purpose of this paper is to show how to solve in Hamiltonian formalism the equations of the polar motion of any arbitrarily shaped elastic celestial body, i.e. the motion of its rotation axis ( or angular momentum) with respect to its figure[...]texto impreso
Monte Carlo simulations of the spatially homogeneous Boltzmann equation for inelastic Maxwell molecules, performed by Baldassarri et al. (cond-mat/0111066), have shown that general classes of initial distributions evolve for large times into a s[...]texto impreso
Montes Gutiérrez, David ; Martín, E. L. ; Fernández Figueroa, María José ; Cornide Castro-Piñeiro, Manuel ; Castro Rubio, Elisa de | EDP Sciences | 1997-06In this work we present spectroscopic observations centered in the spectral lines most widely used as optical indicators of chromospheric activity (H?, H?, CaII H & K, and HeI D_3) in a sample of F, G, K and M chromospherically inactive stars. [...]texto impreso
We present a library of Utrecht echelle spectrograph (UES) observations of a sample of F, G, K and M field dwarf stars covering the spectral range from 4800 Å to 10600 Å with a resolution of 55000. These spectra include some of the spectral line[...]texto impreso
Gil de Paz, Armando ; Zamorano Calvo, Jaime ; Gallego Maestro, Jesús ; Domínguez, F. de B. | EDP Sciences | 2000-09We have obtained optical (BVR, [O III]? 5007 Å and H_?), near infrared (JHK) imaging and long-slit optical spectroscopy for the Blue Compact Dwarf galaxy Mrk 86 (NGC 2537). In this paper, the first of two, we present optical-near-infrared colors[...]texto impreso
Antoranz Canales, Pedro ; Barrio Uña, Juan Abel ; Contreras González, José Luis ; Fonseca González, Mª Victoria ; López Moya, Marcos ; Miranda Pantoja, José Miguel ; Nieto, Daniel ; Scapin, Valeria | EDP Sciences | 2012-06The blazar Markarian 421 is one of the brightest TeV gamma-ray sources of the northern sky. From December 2007 until June 2008 it was intensively observed in the very high energy (VHE, E > 100 GeV) band by the single-dish Major Atmospheric Gamm[...]texto impreso
Montes Gutiérrez, David ; Fernández Figueroa, María José ; Castro Rubio, Elisa de ; Sanz Forcada, J. | EDP Sciences | 1997-10This is the first paper of a series aimed at studying the chromosphere of active binary systems using the information provided for several optical spectroscopic features. Simultaneous H_?, Na I D_1, D_2, and He I D_3 spectroscopic observations a[...]texto impreso
Montes Gutiérrez, David ; Fernández Figueroa, María José ; Castro Rubio, Elisa de ; Cornide Castro-Piñeiro, Manuel ; Latorre, A. ; Sanz Forcada, J. | EDP Sciences | 2000-10This is the third paper of a series aimed at studying the chromosphere of active binary systems using the information provided for several optical spectroscopic features. High resolution echelle spectra including all the optical chromospheric ac[...]texto impreso
Montes Gutiérrez, David ; Fernández Figueroa, María José ; Castro Rubio, Elisa de ; Cornide Castro-Piñeiro, Manuel ; Latorre, A. ; Sanz Forcada, J. | EDP Sciences | 2000-10This is the third paper of a series aimed at studying the chromosphere of active binary systems using the information provided for several optical spectroscopic features. High resolution echelle spectra including all the optical chromospheric ac[...]texto impreso
We present generalized Green-Kubo expressions for thermal transport coefficients mu in non-conservative fluid-type systems, of the generic form mu = mu(infinity)+ integral(o)(infinity) dtV(-1) [I-epsilon exp[tL] I](0), where exp[tL] is a pseudo-[...]texto impreso
Gallego Maestro, Jesús ; Zamorano Calvo, Jaime ; Rego Fernández, Manuel ; Alonso, O. ; Vitores, A. G. | EDP Sciences | 1996-12Spectroscopic observations for the full sample of Her emission-line galaxy candidates (ELGs) from the Universidad Complutense de Madrid objective-prism survey Lists 1 and 2 have been obtained in order to investigate fully the properties of the s[...]texto impreso
A phenomenological and Newtonian model is proposed to explain the recent observed cosmological variation of the fine-structure constant as an effect of the quantum vacuum, assuming a at universe with cosmological Lambda constant in the cases (Om[...]texto impreso
Rosado Vélez, Jaime ; Gallego, P. ; García Pinto, Diego ; Blanco Ramos, Francisco ; Arqueros Martínez, Fernando | EDP Sciences | 2013-02-13The uncertainty in the absolute value of the air-fluorescence yield still puts a severe limit on the accuracy in the primary energy of ultra-high-energy cosmic rays. The precise measurement of this parameter in laboratory is in turn conditioned [...]texto impreso
Pérez González, Pablo Guillermo ; Zamorano Calvo, Jaime ; Gallego Maestro, Jesús ; Gil de Paz, Armando | EDP Sciences | 2000-02We present Johnson B CCD photometry for the whole sample of galaxies of the Universidad Complutense de Madrid (UCM) Survey Lists I and II. They constitute a well-defined and complete sample of galaxies in the Local Universe with active star form[...]texto impreso
We consider a Markov decision process for an MX/M/1 queue that is controlled by batches of negative customers. More specifically, we derive conditions that imply threshold-type optimal policies, under either the total discounted cost criterion o[...]texto impreso
Antoranz Canales, Pedro ; Barrio Uña, Juan Abel ; Contreras González, José Luis ; Fonseca González, Mª Victoria ; López Moya, Marcos ; Miranda Pantoja, José Miguel ; Nieto, Daniel ; Satalecka, Konstanzja ; Scapin, Valeria | EDP Sciences | 2012-04We use 73 h of stereoscopic data taken with the MAGIC telescopes to investigate the very high-energy (VHE) gamma-ray emission of the Crab pulsar. Our data show a highly significant pulsed signal in the energy range from 50 to 400 GeV in both the[...]texto impreso
Vitores, A. G. ; Zamorano Calvo, Jaime ; Rego Fernández, Manuel ; Gallego Maestro, Jesús ; Alonso, O. | EDP Sciences | 1996-12We present the results of Thuan & Gunn r CCD imaging observations of the Universidad Complutense de Madrid (UCM) sample of emission-line galaxies (ELGs) selected by the presence of H_? emission in low resolution objective-prism spectra. In this [...]texto impreso
Vitores, A. G. ; Zamorano Calvo, Jaime ; Rego Fernández, Manuel ; Alonso, O ; Gallego Maestro, Jesús | EDP Sciences | 1996-07We present the results of Thuan & Gunn r CCD imaging observations of the Universidad Complutense de Madrid (UCM) sample of emission-line galaxies (ELGs), selected by the presence of H_? emission in low-resolution objective prism spectra. In this[...]texto impreso
Klutsch, Alexis ; Freire Ferreros, R. ; Guillout, P. ; Frasca, A. ; Marilli, E. ; Montes Gutiérrez, David | EDP Sciences | 2014-07Context. Over the last century, the overdensities in the velocity distributions of nearby stars were attributed to stellar kinematic groups or moving groups. Although their reality was initially questioned, their existence is now supported by a [...]texto impreso
Cardiel López, Nicolás ; Gorgas García, Francisco Javier ; Cenarro, J. ; González, J. J. | EDP Sciences | 1998-02We present a new set of accurate formulae for the computation of random errors in the measurement of atomic and molecular line-strength indices. The new expressions are in excellent agreement with numerical simulations. We have found that, in so[...]texto impreso
Frasca, A. ; Guillout, P. ; Klutsch, A. ; Freire Ferrero, R. ; Marilli, E. ; Biazzo, K. ; Gandolfi, D. ; Montes Gutiérrez, David | EDP Sciences | 2018-05-04Context. Star formation in the solar neighborhood is mainly traced by young stars in open clusters, associations, and in the field, which can be identified, for example, by their X-ray emission. The determination of stellar parameters for the op[...]texto impreso
You The Air Microwave Yield (AMY) experiment investigate the molecular bremsstrahlung radiation emitted in the GHz frequency range from an electron beam induced air-shower. The measurements have been performed at the Beam Test Facility (BTF) of [...]texto impreso
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Vázquez Peñas, José Ramón ; Rosado Vélez, Jaime ; García Pinto, Diego ; Arqueros Martínez, Fernando | EDP Sciences | 2013The fluorescence yield data used for shower reconstruction in the Auger, HiRes and TA experiments are different, not only in the overall absolute value but also in the wavelength spectrum and the various atmospheric dependencies. The effect on t[...]texto impreso
A novel method for direct electronic "fast-timing" lifetime measurements of nuclear excited states via gamma-gamma coincidences using an array equipped with N very fast high-resolution LaBr3(Ce) scintillator detectors is presented. The generaliz[...]texto impreso
Borlaff, Alejandro ; Trujillo, Ignacio ; Román, Javier ; Beckman, John E. ; Eliche Moral, M. Carmen ; Infante Sáinz, Raúl ; Lumbreras Calle, Alejandro ; Takuro Sato Martín de Almagro, Rodrigo ; Gómez Guijarro, Carlos ; Cebrián, María ; Dorta, Antonio ; Cardiel López, Nicolás ; Akhlaghi, Mohammad ; Martínez Lombilla, Cristina | EDP Sciences | 2019-01-21Context. The Hubble Ultra Deep field (HUDF) is the deepest region ever observed with the Hubble Space Telescope. With the main objective of unveiling the nature of galaxies up to z ? 7?8, the observing and reduction strategy have focused on the [...]texto impreso
At the PF1B cold neutron beam line at the Institut Laue Langevin, the EXILL array consisting of EXOGAM, GASP and ILL-Clover detectors was used to perform (n,gamma) measurements at very high coincidence rates. About ten different reactions were m[...]texto impreso
Reglero, V. ; Fernández Figueroa, María José ; Giménez, A. ; Castro Rubio, Elisa de ; Fabregat, J. ; Cornide Castro-Piñeiro, Manuel ; Armentia, J. E. | EDP Sciences | 1991-06A detailed study of the system V772 Her = HD 165590 = ADS 11060 AB is presented. The three identified components are found to be late type stars close to the zero-age main sequence with high rotational velocities. Spectroscopic observations allo[...]texto impreso
This paper is the first of a series whose aim is to perform a systematic study of A-type supergiant atmospheres and winds. Here we present a spectral atlas of 41 A-supergiants observed by us in high and medium resolution in the visible asd ultra[...]texto impreso
Sánchez, Néstor ; Gómez de Castro, Ana Inés ; López-Martinez, Fátima ; López-Santiago, Javier | EDP Sciences | 2014-12We analyze 359 ultraviolet tiles from. the All Sky Imaging Survey of the space mission GALEX covering roughly 400 square degrees toward the Orion star-forming region. There are a total of 1 555 174 ultraviolet sources that were cross-matched wit[...]