Zobrazeno 1 - 10
of 378
pro vyhledávání: '"Krabbe, A C"'
Autor:
de Mellos, Maitê S. Z., Riffel, Rogemar A., Schimoia, Jaderson S., Rembold, Sandro B., Riffel, Rogério, Storchi-Bergmann, Thaisa, Wylezalek, Dominika, Ilha, Gabriele S., Albán, Marco, Dors, Oli L., Gatto, Lara, Krabbe, Angela C., Mallmann, Nicolas D., Trevisan, Marina
The influence of Active Galactic Nuclei (AGN) on star formation within their host galaxies remains a topic of intense debate. One of the primary challenges in quantifying the star formation rate (SFR) within AGN hosts arises from the prevalent assump
Externí odkaz:
http://arxiv.org/abs/2410.06297
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:
Cezar, Pedro H., Pastoriza, Miriani G., Riffel, Rogério, Almeida, Cristina Ramos, Krabbe, Angela C., Rembold, Sandro B.
Publikováno v:
A&A 689, A312 (2024)
We present Gemini Multi-Object Spectrograph (GMOS) spectroscopic observations of 95 galaxies from the Arp & Madore (1987) catalogue of peculiar galaxies. These galaxies have been selected because they appear to be in pairs and small groups. These obs
Externí odkaz:
http://arxiv.org/abs/2405.19960
Autor:
Oliveira Jr., C. B., Krabbe, A. C., Dors Jr., O. L., Zinchenko, I. A., Hernandez-Jimenez, J. A., Cardaci, M. V., Hägele, G. F., Ilha, G. S.
In this work, we investigated the nitrogen and oxygen abundances in a sample of galaxies with Low Ionization Nuclear Emission Regions (LINERs) in their nucleus. Optical spectroscopic data (3 600 - 10 000 {\AA}) of 40 LINERs from the Mapping Nearby Ga
Externí odkaz:
http://arxiv.org/abs/2404.16631
Autor:
Castelli, A. V. Smith, Cortesi, A., Haack, R. F., Lopes, A. R., Thainá-Batista, J., Fernandes, R. Cid, Lomelí-Núñez, L., Ribeiro, U., de Bom, C. R., Cernic, V., Sodré Jr, L., Zenocratti, L., De Rossi, M. E., Calderón, J. P., Herpich, F., Telles, E., Saha, K., Lopes, P. A. A., Lopes-Silva, V. H., Gonçalves, T. S., Bambrila, D., Cardoso, N. M., Buzzo, M. L., Sotomayor, P. Astudillo, Demarco, R., Leigh, N., Sarzi, M., Menéndez-Delmestre, K., Faifer, F. R., Jiménez-Teja, Y., Grossi, M., Hernández-Jiménez, J. A., Krabbe, A. C., Soto, L. A. Gutiérrez, Brandão, D., Espinosa, L., Olave-Rojas, D. E., Schwarz, G. B. Oliveira, Almeida-Fernandes, F., Schoenell, W., Ribeiro, T., Kanaan, A., de Oliveira, C. Mendes
The Fornax galaxy cluster is the richest nearby (D ~ 20 Mpc) galaxy association in the southern sky. As such, it provides a wealth of oportunities to elucidate on the processes where environment holds a key role in transforming galaxies. Although it
Externí odkaz:
http://arxiv.org/abs/2403.10697
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
Cosmic metallicity evolution of Active Galactic Nuclei: Implications for optical diagnostic diagrams
Autor:
Dors, Oli L., Cardaci, M. V., Hagele, G. F., Ilha, G. S., Oliveira, C. B., Riffel, R. A., Riffel, R., Krabbe, A. C.
We analyze the validity of optical diagnostic diagrams relying on emission-lines ratios and in the context of classifying Active Galactic Nuclei (AGNs) according to the cosmic metallicity evolution in the redshift range 0 < z < 11.2. In this regard,
Externí odkaz:
http://arxiv.org/abs/2311.14026
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:
Oliveira Jr., C. B., Krabbe, A. C., Hernandez-Jimenez, J. A., Dors Jr., O. L., Zinchenko, I. A., Hägele, G. F., Cardaci, M. V., Monteiro, A. F.
The ionizing source of Low Ionization Nuclear Emission Regions (LINERs) is uncertain. Because of this, an empirical relation to determine the chemical abundances of these objects has not been proposed. In this work, for the first time, we derived two
Externí odkaz:
http://arxiv.org/abs/2207.10260