Zobrazeno 1 - 10
of 141
pro vyhledávání: '"Dors, O."'
Autor:
Armah, Mark, Riffel, Rogério, Dahmer-Hahn, L. G., Davies, R. I., Dors, O. L., Kakkad, Darshan, Riffel, Rogemar A., Rodríguez-Ardila, A., Ruschel-Dutra, D., Storchi-Bergmann, T.
We explore the relations between the gas-phase metallicity radial profiles (few hundred inner parsec) and multiple galaxy properties for 15 Seyfert galaxies from the AGNIFS (Active Galactic Nuclei Integral Field Spectroscopy) sample using optical Int
Externí odkaz:
http://arxiv.org/abs/2409.20465
Autor:
Dors, O. L., Almeida, G. C., Oliveira, C. B., Flury, S. R., Riffel, R., Riffel, R. A., Cardaci, M. V., Hägele, G. F., Ilha, G. S., Krabbe, A. C., Arellano-Córdova, K. Z., Santos, P. C., Morais, I. N.
For the first time, a calibration between the HeI $\lambda5876$/H$\beta$ emission line ratio and the helium abundance $y$=12+log(He/H) for Narrow line regions (NLRs) of Seyfert~2 Active Galactic Nuclei (AGN) is proposed. In this context, observationa
Externí odkaz:
http://arxiv.org/abs/2406.03259
Autor:
Dors, O. L., Cardaci, M. V., Hägele, G. F., Valerdi, M., Ilha, G. S., Oliveira, C. B., Riffel, R. A., Flury, S. R., Arellano-Córdova, K. Z., Storchi-Bergmann, T., Riffel, R., Almeida, G. C., Morais, I. N.
We derive the nitrogen and oxygen abundances in the Narrow Line Regions (NLRs) of a sample of 38 local ($z \: < \: 0.4$) Seyfert~2 nuclei. For that, we consider narrow optical emission line intensities and direct estimates of the electron temperature
Externí odkaz:
http://arxiv.org/abs/2405.13906
Autor:
Krabbe, A. C., Hernandez-Jimenez, J. A., de Oliveira, C. Mendes, Jaffe, Y. L., Oliveira Jr., C. B., Cardoso, N. M., Castelli, A. V. Smith, Dors, O. L., Cortesi, A., Crossett, J. P.
This paper presents a method for finding ram-pressure stripped (RPS) galaxy candidates by performing a morphological analysis of galaxy images obtained from the Legacy survey. We consider a sample of about 600 galaxies located in different environmen
Externí odkaz:
http://arxiv.org/abs/2312.09220
Autor:
Nandi, Payel, Stalin, C. S., Saikia, D. J., Riffel, Rogemar A., Manna, Arijit, Pal, Sabyasachi, Dors, O. L., Wylezalek, Dominika, Paliya, Vaidehi S., Saikia, P., Dabhade, Pratik, Patig, Markus-Kissler, Sagar, Ram
Black hole driven outflows in galaxies hosting active galactic nuclei (AGN) may interact with their interstellar medium (ISM) affecting star formation. Such feedback processes, reminiscent of those seen in massive galaxies, have been reported recentl
Externí odkaz:
http://arxiv.org/abs/2307.13263
Autor:
Dors, O. L., Valerdi, M., Riffel, R. A., Riffel, R., Cardaci, M. V., Hägele, G. F., Armah, M., Revalski, M., Flury, S. R., Freitas-Lemes, P., Amôres, E. B., Krabbe, A. C., Binette, L., Feltre, A., Storchi-Bergmann, T.
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:
http://arxiv.org/abs/2302.12876
Autor:
Armah, Mark, Riffel, Rogério, Dors, O. L., Oh, Kyuseok, Koss, Michael J., Ricci, Claudio, Trakhtenbrot, Benny, Valerdi, Mabel, Riffel, Rogemar A., Krabbe, Angela C.
We present oxygen abundances relative to hydrogen (O/H) in the narrow line regions (NLRs) gas phases of Seyferts 1 (Sy 1s) and Seyferts 2 (Sy 2s) Active Galactic Nuclei (AGNs). We used fluxes of the optical narrow emission line intensities [$3\,500<\
Externí odkaz:
http://arxiv.org/abs/2301.07596
Autor:
Feltre, A., Gruppioni, C., Marchetti, L., Mahoro, A., Salvestrini, F., Mignoli, M., Bisigello, L., Calura, F., Charlot, S., Chevallard, J., Romero-Colmenero, E., Curtis-Lake, E., Delvecchio, I., Dors, O. L., Hirschmann, M., Jarrett, T., Marchesi, S., Moloko, M. E., Plat, A., Pozzi, F., Sefako, R., Traina, A., Vaccari, M., Väisänen, P., Vallini, L., Vidal-García, A., Vignali, C.
Line ratio diagnostics provide valuable clues on the source of ionizing radiation in galaxies with intense black hole accretion and starbursting events, such as local Seyfert or galaxies at the peak of the star formation history. We aim to provide a
Externí odkaz:
http://arxiv.org/abs/2301.02252
Autor:
S., Pilyugin L., A., Lara-Lopez M., M., Vilchez J., S., Duarte Puertas, A., Zinchenko I., L, Dors O.
Publikováno v:
A&A 668, A5 (2022)
In this work we make use of available Integral Field Unit (IFU) spectroscopy and slit spectra of several nearby galaxies. The pre-existing empirical R and S calibrations for abundance determinations are constructed using a sample of HII regions with
Externí odkaz:
http://arxiv.org/abs/2209.13967
Autor:
Dors, O. L., Valerdi, M., Freitas-Lemes, P., Krabbe, A. C., Riffel, R. A., Amôres, E. B., Riffel, R., Armah, M., Monteiro, A. F., Oliveira, C. B.
For the first time, the helium abundance relative to hydrogen (He/H), which relied on direct measurements of the electron temperature, has been derived in the narrow line regions (NLRs) from a local sample of Seyfert 2 nuclei. In view of this, optica
Externí odkaz:
http://arxiv.org/abs/2206.09836