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Autor Gorgas García, Francisco Javier |
Documentos disponibles escritos por este autor (55)
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Vazdekis, A. ; Sánchez Blázquez, P. ; Falcón Barroso, J. ; Cenarro, A. J. ; Beasley, M. A. ; Cardiel López, Nicolás ; Gorgas García, Francisco Javier ; Peletier, R. | Cambridge Univ. Press | 2009-08We present SEDs for single-age, single-metallicity stellar populations (SSPs) covering the full optical spectral range at resolution (FWHM = 2.3Å). These SEDs can be regarded as our base models, as we combine scaled-solar isochrones with an empi[...]texto impreso
Cenarro, A. J. ; Gorgas García, Francisco Javier ; Vazdekis, A. ; Cardiel López, Nicolás ; Peletier, R. F. | Wiley | 2003-02-11We present new relations between recently defined line-strength indices in the near-infrared (CaT*, CaT, PaT, MgI and sTiO) and central velocity dispersion (sigma(0) ) for a sample of 35 early-type galaxies, showing evidence for significant anti[...]texto impreso
Martín Hernández, J.M. ; Mármol Queraltó, E. ; Gorgas García, Francisco Javier ; Cardiel López, Nicolás ; Sánchez Blázquez, P. ; Cenarro, A.J. ; Peletier, R. F. ; Vazdekis, A. ; Falcón Barroso, J. | SPRINGER-VERLAG BERLIN | 2010We are presenting new empirical fitting functions for the Lick/IDS line-strength indices as measured in MILES (Medium-resolution INT Library of Empirical Spectra). Following previous work in the field, these functions describe the empirical beha[...]texto impreso
Mármol Queraltó, E. ; Cardiel López, Nicolás ; Gorgas García, Francisco Javier ; Pedraz, S. ; Cenarro, A.J. ; Sánchez Blázquez, P. ; Peletier, R. F. ; Vazdekis, A. | Instituto de Astronomía. Universidad Nacional Autónoma de México | 2005Stellar population synthesis models are crucial for the understanding of the large amount of data which is being gathered for galaxies at low and high redshift, and provide the only way to compare the "real world" with the theoretical framework.[...]texto impreso
Mármol Queraltó, E. ; Cardiel López, Nicolás ; Cenarro, A. J. ; Vazdekis, A. ; Gorgas García, Francisco Javier ; Pedraz, S. ; Peletier, R. F. ; Sánchez Blázquez, P. | EDP Sciencies | 2008-10The analysis of unresolved stellar populations demands evolutionary synthesis models with realistic physical ingredients and extended wavelength coverage. Aims. We quantitatively describe the first CO bandhead at 2.3 mu m to allow stellar popula[...]texto impreso
Old stellar populations .4. Empirical fitting functions for features in the Spectra of G and K stars
Gorgas García, Francisco Javier ; Faber, S. M. ; Burstein, David ; González, J. Jesús ; Courteau, Stéphane ; Prosser, Charles | University Chicago Press | 1993-05Empirical fitting functions are presented that model the behavior of 11 strong atomic and molecular features in the spectra of Galactic G and K stars. The functions express the strength of spectral features as a function of V - K, surface gravit[...]texto impreso
Carretero, C. ; Vazdekis, A. ; Beckman, J. E. ; Sánchez Blázquez, P. ; Gorgas García, Francisco Javier | American Astronomical Society | 2004-07-10We present estimates of CN and Mg overabundances with respect to Fe for early-type galaxies in eight clusters over a range of richness and morphology. Spectra were taken from the Sloan Digital Sky Survey Data Release 1 and from William Hershel T[...]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
Cardiel López, Nicolás ; Gorgas García, Francisco Javier ; Aragón Salamanca, A. | Wiley | 1998-08-21We have obtained radial gradients in the spectral features of the lambda 4000-Angstrom break (D(4000)) and Mg(2) for a sample of 11 central cluster galaxies (CCGs): eight in clusters with cooling flows and three in clusters without. After carefu[...]texto impreso
Cardiel López, Nicolás ; Gorgas García, Francisco Javier ; Aragón Salamanca, A. | Wiley-Blackwell | 1995-11-15Spectroscopic observations of central dominant cluster galaxies, with and without cooling flows, are presented. Through the analysis of absorption spectral features, namely the strength of the magnesium absorption at 5175 Å and the 4000 Å break,[...]texto impreso
Cardiel López, Nicolás ; Gorgas García, Francisco Javier ; Aragón Salamanca, A. | Wiley | 1995-11-15Spectroscopic observations of central dominant cluster galaxies, with and without cooling flows, are presented. Through the analysis of absorption spectral features, namely the strength of the magnesium absorption at lambda 5175 Angstrom and the[...]texto impreso
Toloba, E. ; Guhathakurta, P. ; Peletier, R. F. ; Boselli, A. ; Lisker, T. ; Falcón Barroso, J. ; Simon, J. D. ; van de Ven, G. ; Paudel, S. ; Emsellem, E. ; Janz, J. ; den Brok, M. ; Gorgas García, Francisco Javier ; Hensler, G. ; Laurikainen, E. ; Niemi, S. M. ; Rys, A. ; Salo, H. | University Chicago Press | 2014-12We present spatially resolved kinematics and global stellar populations and mass-to-light ratios for a sample of 39 dwarf early-type (dE) galaxies in the Virgo cluster studied as part of the SMAKCED stellar absorption-line spectroscopy and imagi[...]texto impreso
Toloba, E. ; Guhathakurta, P. ; Boselli, A. ; Peletier, R. F. ; Emsellem, E. ; Lisker, T. ; van de Ven, G. ; Simon, J. D. ; Falcón Barroso, J. ; Adams, J. J. ; Benson, A. J. ; Boissier, S. ; den Brok, M. ; Gorgas García, Francisco Javier ; Hensler, G. ; Janz, J. ; Laurikainen, E. ; Paudel, S. ; Rys, A. ; Salo, H. | IOP Publishing | 2015-02-01We analyze the stellar kinematics of 39 dwarf early-type galaxies (dEs) in the Virgo Cluster. Based on the specific stellar angular momentum lambda(Re) and the ellipticity, we find 11 slow rotators and 28 fast rotators. The fast rotators in the [...]texto impreso
This is the first paper presenting our long-term project aimed at studying the nature of bulges through analyzing their stellar population gradients. We present deep spectroscopic observations along the minor axis and the data reduction for a sa[...]texto impreso
We present the analysis of the radial gradients of stellar absorption lines in a sample of 32 bulges of edge-on spiral galaxies, spanning nearly the full Hubble sequence (from S0 to Sc types), and a large range of velocity dispersion (from about[...]