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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
Cenarro, A. J. ; Gorgas García, Francisco Javier ; Cardiel López, Nicolás ; Pedraz, S. ; Peletier, R. F. ; Vazdekis, A. | Wiley | 2001-09-21We present a homogeneous set of stellar atmospheric parameters (T-eff, log g, [Fe/H]) for a sample of about 700 field and cluster stars which constitute a new stellar library in the near-IR developed for stellar population synthesis in this spec[...]texto impreso
Pedraz, S. ; Gorgas García, Francisco Javier ; Cardiel López, Nicolás ; Sánchez Blázquez, P. ; Guzmán, R. | Wiley | 2002-05In this letter we investigate the kinematical properties of early-type dwarfs by significantly enlarging the scarce observational sample so far available. We present rotation curves and mean velocity dispersions for four bright dwarf ellipticals[...]texto impreso
Toloba, E. ; Boselli, A. ; Gorgas García, Francisco Javier ; Peletier, R. F. ; Cenarro, A. J. ; Gadotti, D. A. ; Gil de Paz, Armando ; Pedraz, S. ; Yildiz, U. | IOP Publishing | 2009-12-10We present new observational results on the kinematical, morphological, and stellar population properties of a sample of 21 dEs located both in the Virgo Cluster and in the field, which show that 52% of the dEs (1) are rotationally supported, (2[...]texto impreso
Sánchez, S. F. ; Cardiel López, Nicolás ; Verheijen, M. A. W. ; Pedraz, S. ; Covone, G. | Wiley | 2007-03-21We present a study of the stellar populations and morphologies of galaxies in the core of the galaxy cluster Abell 2218. Integral field spectroscopy (IFS) observations were performed using PMAS in the PPAK mode covering a field of view of simila[...]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
Caballero, J. A. ; Montes Gutiérrez, David ; Klutsch, A. ; Genebriera, J. ; Miret, F. X. ; Tobal, T. ; Cairol, J. ; Pedraz, S. | EDP Sciencies | 2010-09Aims. We investigated in detail the system WDS 19312+3607, whose primary is an active M4.5Ve star previously inferred to be young (? ~ 300–500?Ma) based on its high X-ray luminosity. Methods. We collected intermediate- and low-resolution optical[...]texto impreso
Cardiel López, Nicolás ; Gorgas García, Francisco Javier ; Sánchez Blázquez, P. ; Cenarro, A. J. ; Pedraz, S. ; Bruzual, G. ; Klement, J. | EDP Sciencies | 2003-10It is well known that, when analyzed in the light of current synthesis model predictions, variations in the physical properties of single stellar populations (e.g. age, metallicity, initial mass function, element abundance ratios) may have a sim[...]
