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7 papers · 1 filter
Near-infrared integrated spectra of Galactic globular clusters: testing simple stellar population models
R. Riffel, D. Ruschel-Dutra, M. G. Pastoriza +4
We present SOAR/OSIRIS cross-dispersed NIR integrated spectra of 12 Galactic globular clusters that are employed to test Maraston (2005, M05) NIR EPS models, and to provide spectra…
A multi-wavelength approach to the properties of Extremely Red Galaxy populations: I - Contribution to the Star Formation Rate density and AGN content
Hugo Messias, Jose Afonso, Andrew Hopkins +3
We present a multi-wavelength analysis of the properties of Extremely Red Galaxy (ERG) populations, selected in the GOODS-South/Chandra Deep Field South field. By using all the pho…
Particle Acceleration and Magnetic Field Structure in PKS 2155-304: Optical Polarimetric Observations
U. Barres de Almeida, M. J. Ward, T. P. Dominici +5
In this paper we present multiband optical polarimetric observations of the VHE blazar PKS 2155-304 made simultaneously with a H.E.S.S./Fermi high-energy campaign in 2008, when the…
Nuclear and Extended Spectra of NGC 1068 - II: Near-Infrared Stellar Population Synthesis
Lucimara Martins, Rogério Riffel, Alberto Rodríguez-Ardila +2
We performed stellar population synthesis on the nuclear and extended regions of NGC 1068 by means of near-infrared spectroscopy to disentangle their spectral energy distribution c…
Nuclear and Extended Spectra of NGC 1068 - I: Hints from Near-Infrared Spectroscopy
Lucimara Martins, Alberto Rodríguez-Ardila, Ronaldo de Souza +1
We report the first simultaneous zJHK spectroscopy on the archetypical Seyfert 2 Galaxy NGC 1068 covering the wavelength region 0.9 to 2.4 micron. The slit, aligned in the NS direc…
Demystifying the coronal line region of active galactic nuclei: spatially resolved spectroscopy with HST
Ximena Mazzalay, Alberto Rodríguez-Ardila, S. Komossa
We present an analysis of STIS/HST optical spectra of a sample of ten Seyfert galaxies aimed at studying the structure and physical properties of the coronal-line region (CLR). The…