Search Results - "Cardaci, M. V"

Chemical abundances in Seyfert galaxies – V. The discovery of shocked emission outside the AGN ionization axis by Riffel, R A, Dors, O L, Armah, M, Storchi-Bergmann, T, Feltre, A, Hägele, G F, Cardaci, M V, Ruschel-Dutra, D, Krabbe, A C, Pérez-Montero, E, Zakamska, N L, Freitas, I C

“…ABSTRACT We present maps for the electron temperature in the inner kpc of three luminous Seyfert galaxies: Mrk 79, Mrk 348, and Mrk 607 obtained from Gemini…”
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Semi-empirical metallicity calibrations based on ultraviolet emission lines of type-2 AGNs by Dors, O L, Monteiro, A F, Cardaci, M V, Hägele, G F, Krabbe, A C

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Chemical abundances of Seyfert 2 AGNs – III. Reducing the oxygen abundance discrepancy by Dors, O L, Maiolino, R, Cardaci, M V, Hägele, G F, Krabbe, A C, Pérez-Montero, E, Armah, M

“…ABSTRACT We investigate the discrepancy between oxygen abundance estimations for narrow-line regions of active galactic nuclei (AGNs) type Seyfert 2 derived…”
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A bayesian-like approach to derive chemical abundances in type-2 active galactic nuclei based on photoionization models by Pérez-Montero, E, Dors, O L, Vílchez, J M, García-Benito, R, Cardaci, M V, Hägele, G F

“…Abstract We present a new methodology for the analysis of the emission lines of the interstellar medium in the narrow-line regions around type-2 active…”
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Chemical abundances of Seyfert 2 AGNs – II. N2 metallicity calibration based on SDSS by Carvalho, S P, Dors, O L, Cardaci, M V, Hägele, G F, Krabbe, A C, Pérez-Montero, E, Monteiro, A F, Armah, M, Freitas-Lemes, P

“…ABSTRACT We present a semi-empirical calibration between the metallicity (Z) of Seyfert 2 active galactic nuclei and the N2 = log([N ii]λ6584/H α)…”
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New quantitative nitrogen abundance estimations in a sample of Seyfert 2 active galactic nuclei by Dors Jr, O. L., Arellano-Córdova, K. Z., Cardaci, M. V., Hägele, G. F.

“…Abstract We obtained new quantitative determinations of the nitrogen abundance and a consistent relation between the nitrogen and oxygen abundances for a…”
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Chemical abundances of Seyfert 2 AGNs – I. Comparing oxygen abundances from distinct methods using SDSS by Dors, O L, Freitas-Lemes, P, Amôres, E B, Pérez-Montero, E, Cardaci, M V, Hägele, G F, Armah, M, Krabbe, A C, Faúndez-Abans, M

“…ABSTRACT We compare the oxygen abundance (O/H) of the narrow-line regions (NLRs) of Seyfert 2 AGNs obtained through strong-line methods and from direct…”
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On the central abundances of active galactic nuclei and star-forming galaxies by Dors, O. L., Cardaci, M. V., Hägele, G. F., Rodrigues, I., Grebel, E. K., Pilyugin, L. S., Freitas-Lemes, P., Krabbe, A. C.

“…We examine the relation between oxygen abundances in the narrow-line regions (NLRs) of active galactic nuclei (AGNs) estimated from the optical emission lines…”
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Integral field spectroscopy of Green Peas – I. Disentangling disc-like turbulence and strong outflow kinematics in SDSS J083843.63+385350.5 by Bosch, G, Hägele, G F, Amorín, R, Firpo, V, Cardaci, M V, Vílchez, J M, Pérez-Montero, E, Papaderos, P, Dors, O L, Krabbe, A C, Campuzano-Castro, F

“…ABSTRACT Integral field spectroscopy is well known for providing detailed insight of extended sources thanks to the possibility of handling space resolved…”
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Chemical abundance of LINER galaxies – metallicity calibrations based on SDSS-IV MaNGA by Oliveira, C B, Krabbe, A C, Hernandez-Jimenez, J A, Dors, O L, Zinchenko, I A, Hägele, G F, Cardaci, M V, Monteiro, A F

“…ABSTRACT The ionizing source of low-ionization nuclear emission-line regions (LINERs) is uncertain. Because of this, an empirical relation to determine the…”
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Cosmic metallicity evolution of Active Galactic Nuclei: implications for optical diagnostic diagrams by Dors, Oli L, Cardaci, M V, Hägele, G F, Ilha, G S, Oliveira, C B, Riffel, R A, Riffel, R, Krabbe, A C

“…ABSTRACT We analyse the validity of optical diagnostic diagrams relying on emission-lines ratios and in the context of classifying Active Galactic Nuclei…”
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Chemical abundances of LINER galaxies – nitrogen abundance estimations by Oliveira, C B, Krabbe, A C, Dors, O L, Zinchenko, I A, Hernandez-Jimenez, J A, Cardaci, M V, Hägele, G F, Ilha, G S

“…ABSTRACT In this work, we investigated the nitrogen and oxygen abundances in a sample of galaxies with Low Ionization Nuclear Emission Regions (LINERs) in…”
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Chemical abundances in Seyfert galaxies – X. Sulphur abundance estimates by Dors, Oli L, Valerdi, M, Riffel, R A, Riffel, R, Cardaci, M V, Hägele, G F, Armah, Mark, Revalski, M, Flury, S R, Freitas-Lemes, P, Amôres, E B, Krabbe, A C, Binette, L, Feltre, A, Storchi-Bergmann, T

“…ABSTRACT For the first time, the sulphur abundance relative to hydrogen (S/H) in the narrow-line regions of a sample of Seyfert 2 nuclei (Sy 2s) has been…”
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Chemical abundances in Seyfert galaxies – VII. Direct abundance determination of neon based on optical and infrared emission lines by Armah, Mark, Dors, O L, Aydar, C P, Cardaci, M V, Hägele, G F, Feltre, Anna, Riffel, R, Riffel, R A, Krabbe, A C

“…ABSTRACT For the first time, neon abundance has been derived in the narrow line region from a sample of Seyfert 2 nuclei. In view of this, we compiled from the…”
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Chemical abundance of the LINER galaxy UGC 4805 with SDSS-IV MaNGA by Krabbe, A C, Oliveira, C B, Zinchenko, I A, Hernández-Jiménez, J A, Dors, O L, Hägele, G F, Cardaci, M V, Telles, N R

“…ABSTRACT Chemical abundance determinations in Low-Ionization Nuclear Emission-line Regions (LINERs) are especially complex and uncertain because the nature of…”
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Nature and chemical abundances of a sample of Lyman-α emitter objects at high redshift by Dors, O L, Agarwal, B, Hägele, G F, Cardaci, M V, Rydberg, Claes-Erik, Riffel, R A, Oliveira, A S, Krabbe, A C

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Effective temperature of ionizing stars in extragalactic H  ii regions – II. Nebular parameter relationships based on CALIFA data by Zinchenko, I A, Dors, O L, Hägele, G F, Cardaci, M V, Krabbe, A C

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Sulphur abundance determinations in star-forming regions – I. Ionization correction factor by Dors, O. L., Pérez-Montero, E., Hägele, G. F., Cardaci, M. V., Krabbe, A. C.

“…In this work, we used a grid of photoionization models combined with stellar population synthesis models to derive reliable ionization correction factors…”
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Chemical abundances of Seyfert 2 AGNs – IV. Composite models calculated by photoionization + shocks by Dors, O L, Contini, M, Riffel, R A, Pérez-Montero, E, Krabbe, A C, Cardaci, M V, Hägele, G F

“…ABSTRACT We build detailed composite models of photoionization and shock ionization based on the suma code to reproduce emission lines emitted from the Narrow…”
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Interaction effects on galaxy pairs with Gemini/GMOS – II: oxygen abundance gradients by Rosa, D. A., Dors, O. L., Krabbe, A. C., Hägele, G. F., Cardaci, M. V., Pastoriza, M. G., Rodrigues, I., Winge, C.

“…In this paper, we derive oxygen abundance gradients from H ii regions located in 11 galaxies in eight systems of close pairs. Long-slit spectra in the range…”
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