Chemical abundances in Seyfert galaxies X. Sulphur abundance estimates

Autor: Oli L Dors, M Valerdi, R A Riffel, R Riffel, M V Cardaci, G F Hägele, Mark Armah, M Revalski, S R Flury, P Freitas-Lemes, E B Amôres, A C Krabbe, L Binette, A Feltre, T Storchi-Bergmann

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 derived via direct estimation of the electron temperature. Narrow emission line intensities from the SDSS

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::62662ea46eff9bdd9b62c8ec6b1c7058

Gas phase metallicity determinations in nearby AGNs with SDSS-IV MaNGA: evidence of metal poor accretion

Autor: Janaína C do Nascimento, Oli L Dors, Thaisa Storchi-Bergmann, Nícolas D Mallmann, Rogério Riffel, Gabriele S Ilha, Rogemar A Riffel, Sandro B Rembold, Alice Deconto-Machado, Luiz N da Costa, Mark Armah

We derive the metallicity (traced by the O/H abundance) of the narrow-line region (NLR) of 108 Seyfert galaxies as well as radial metallicity gradients along their galaxy discs and of these of a matched control sample of no active galaxies. In view o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a3cba7bcaa4433cf2097fa2f8a26b431

ANÁLISE DA ATIVIDADE NUCLEAR DE DEZ GALÁXIAS COM ANEL POLAR

Autor: P. Freitas-Lemes, Irapuan Rodrigues, Max Faúndez-Abans, Oli L. Dors

Publikováno v: Revista UniVap, Vol 19, Iss 34, Pp 53-57 (2013)
Revista Univap; Vol. 19 No. 34 (2013): Revista Univap online Edição Especial Simpósio de Física e Astronomia do Vale do Paraíba / ISSN 2237-1753; 53-57
Revista Univap; v. 19 n. 34 (2013): Revista Univap online Edição Especial Simpósio de Física e Astronomia do Vale do Paraíba / ISSN 2237-1753; 53-57
Revista UniVap
Universidade do Vale do Paraíba (Univap)
instacron:UNIVAP

O acúmulo de massa, proveniente do processo de interação que forma as galáxias com anel polar, é um fator que favorece as condições necessárias para disparar atividades nucleares não térmicas. Esse fato fomentou a análise química de dez g

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::87a77153963be00cc2133db9ee031fab
http://revista.univap.br/index.php/revistaunivap/article/view/241

Ages and metallicities of circumnuclear star formation regions from Gemini IFU observations

Autor: Alex. A. Schimdt, Thaisa Storchi-Bergmann, Rogemar A. Riffel, Oli L. Dors

Aims: We derive the age and metallicity of circumnuclear star formation regions (CNSFRs) located in the spiral galaxies NGC6951 and NGC1097, and investigate the cause of the very low equivalent widths of emission lines found for these regions. Method

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::60485b2609715b883c39d5946dbdd537
http://arxiv.org/abs/0802.2070

Nuclear spirals as feeding channels to the Supermassive Black Hole: the case of the galaxy NGC 6951

Autor: Andrew Robinson, Kambiz Fathi, Rogemar A. Riffel, Oli L. Dors, Alessandro Marconi, David J. Axon, Thaisa Storchi-Bergmann, Göran Östlin

We report the discovery of gas streaming motions along nuclear spiral arms towards the LINER nucleus of the galaxy NGC 6951. The observations, obtained using the GMOS integral field spectrograph on the Gemini North telescope, yielded maps of the flux

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aa837054c90da51b5e988c5c1014db51
http://arxiv.org/abs/0707.4176