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Mark Armah
Mark Armah
E-mail confirmado em ufrgs.br
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Chemical abundances of Seyfert 2 AGNs–III. Reducing the oxygen abundance discrepancy
OL Dors, R Maiolino, MV Cardaci, GF Hägele, AC Krabbe, ...
Monthly Notices of the Royal Astronomical Society 496 (3), 3209-3221, 2020
372020
Chemical abundances in Seyfert galaxies–V. The discovery of shocked emission outside the AGN ionization axis
RA Riffel, OL Dors, M Armah, T Storchi-Bergmann, A Feltre, GF Hägele, ...
Monthly Notices of the Royal Astronomical Society: Letters 501 (1), L54-L59, 2021
342021
Chemical abundances of Seyfert 2 AGNs–I. Comparing oxygen abundances from distinct methods using SDSS
OL Dors, P Freitas-Lemes, EB Amôres, E Pérez-Montero, MV Cardaci, ...
Monthly Notices of the Royal Astronomical Society 492 (1), 468-479, 2020
342020
Gas-phase metallicity determinations in nearby AGNs with SDSS-IV MaNGA: evidence of metal-poor accretion
JC do Nascimento, OL Dors, T Storchi-Bergmann, ND Mallmann, R Riffel, ...
Monthly Notices of the Royal Astronomical Society 513 (1), 807-821, 2022
152022
Chemical abundances in Seyfert galaxies–IX. Helium abundance estimates
OL Dors, M Valerdi, P Freitas-Lemes, AC Krabbe, RA Riffel, EB Amôres, ...
Monthly Notices of the Royal Astronomical Society 514 (4), 5506-5527, 2022
112022
Chemical abundances in Seyfert galaxies–VII. Direct abundance determination of neon based on optical and infrared emission lines
M Armah, OL Dors, CP Aydar, MV Cardaci, GF Hägele, A Feltre, R Riffel, ...
Monthly Notices of the Royal Astronomical Society 508 (1), 371-391, 2021
112021
Oxygen abundances in the narrow line regions of Seyfert galaxies and the metallicity–luminosity relation
M Armah, R Riffel, OL Dors, K Oh, MJ Koss, C Ricci, B Trakhtenbrot, ...
Monthly Notices of the Royal Astronomical Society 520 (2), 1687-1703, 2023
92023
Chemical abundances in Seyfert galaxies–X. Sulphur abundance estimates
OL Dors, M Valerdi, RA Riffel, R Riffel, MV Cardaci, GF Hägele, M Armah, ...
Monthly Notices of the Royal Astronomical Society 521 (2), 1969-1987, 2023
82023
Chemical abundances of Seyfert 2 AGNs–II. N2 metallicity calibration based on SDSS
SP Carvalho, OL Dors, MV Cardaci, GF Hägele, AC Krabbe, ...
Monthly Notices of the Royal Astronomical Society 492 (4), 5675-5683, 2020
52020
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