Zobrazeno 1 - 10
of 87
pro vyhledávání: '"Rodriguez-Ardila, Alberto"'
Autor:
Riffel, Rogerio, Dahmer-Hahn, Luis G., Vazdekis, Alexandre, Davies, Richard, Rosario, David, Almeida, Cristina Ramos, Audibert, Anelise, Martin-Navarro, Ignacio, Martins, Lucimara Pires, Rodriguez-Ardila, Alberto, Riffel, Rogemar A., Storchi-Bergmann, Thaisa, Bertoldo-Coelho, Michele, Trevisan, Marina, Hicks, Erin, Muller, Allan Schnorr, Marinho, Lais Nery, Veilleux, Sylvain
Near-infrared long-slit spectroscopy has been used to study the stellar population (SP) of the low luminosity active galactic nuclei (AGN) and matched analogues (LLAMA) sample. To perform the SP fits we have employed the X-shooter simple stellar popu
Externí odkaz:
http://arxiv.org/abs/2405.00634
Autor:
Bertoldo-Coêlho, Michele, Riffel, Rogério, Trevisan, Marina, Dametto, Natacha Zanon, Dahmer-Hahn, Luis, Coelho, Paula, Martins, Lucimara, Ruschel-Dutra, Daniel, Vazdekis, Alexandre, Rodríguez-Ardila, Alberto, Chies-Santos, Ana L., Riffel, Rogemar A., La Barbera, Francesco, Navarro, Ignacio Martín, Barroso, Jesus Falcon, Moura, Tatiana
Most of the observed galaxies cannot be resolved into individual stars and are studied through their integrated spectrum using simple stellar populations (SSPs) models, with stellar libraries being a key ingredient in building them. Spectroscopic obs
Externí odkaz:
http://arxiv.org/abs/2404.14530
Autor:
Rodriguez-Ardila, Alberto, Fonseca-Faria, Marcos Antonio, Santos, Denimara Dias dos, Panda, Swayamtrupta, Marinello, Murilo
We use near-infrared (NIR) spectroscopy covering simultaneously the $zJHK$ bands to look for outflowing gas from the nuclear environment of 1H0707-495 taking advantage that this region is dominated by low-ionization broad line region (BLR) lines, mos
Externí odkaz:
http://arxiv.org/abs/2403.14832
Constraining the physical conditions of the ionized media in the vicinity of an active supermassive black hole (SMBH) is crucial to understanding how these complex systems operate. Metal emission lines such as iron (Fe) are useful probes to trace the
Externí odkaz:
http://arxiv.org/abs/2401.02936
Autor:
Panda, Swayamtrupta, Marziani, Paola, Czerny, Bozena, Rodriguez-Ardila, Alberto, Nunez, Francisco Pozo
The investigation of emission line regions within active galaxies (AGNs) has a rich and extensive history, now extending to the use of AGNs and quasars as "standardizable" cosmological indicators, shedding light on the evolution of our universe. As w
Externí odkaz:
http://arxiv.org/abs/2311.13298
Autor:
Zajaček, Michal, Panda, Swayamtrupta, Pandey, Ashwani, Prince, Raj, Rodríguez-Ardila, Alberto, Jaiswal, Vikram, Czerny, Bożena, Hryniewicz, Krzysztof, Urbanowicz, Maciej, Trzcionkowski, Piotr, Śniegowska, Marzena, Fałkowska, Zuzanna, Martínez-Aldama, Mary Loli, Werner, Norbert
Publikováno v:
Astronomy & Astrophysics, Volume 683, id.A140, 18 pp., 2024
Fe II emission is a well-known contributor to the UV spectra of active galactic nuclei and the modeling of this part may affect the results obtained for the MgII$\lambda2800$ emission, which is one of the lines used for black hole mass measurements a
Externí odkaz:
http://arxiv.org/abs/2310.03544
Publikováno v:
The Astrophysical Journal Letters, 953:L3 (6pp), 2023 August 10
Double-peaked profiles associated with the broad-line region (BLR) of active galactic nuclei (AGNs) are regarded as the clearest evidence of the presence of an accretion disk. They are most commonly detected by means of optical spectroscopy in the Ba
Externí odkaz:
http://arxiv.org/abs/2308.04555
Autor:
Dahmer-Hahn, Luis G., Rodríguez-Ardila, Alberto, Bianchin, Marina, Riffel, Rogemar A., Riffel, Rogério, Storchi-Bergmann, Thaisa, Hao, Lei
Variability studies have proven to be a powerful diagnostic tool for understanding the physics and properties of of Active Galactic Nuclei (AGNs). They provide insights into the spatial and temporal distribution of the emitting regions, the structure
Externí odkaz:
http://arxiv.org/abs/2306.06916
Autor:
Benedetti, João P. V., Riffel, Rogério, Ricci, Tiago, Trevisan, Marina, Riffel, Rogemar A., Pastoriza, Miriani, Dahmer-Hahn, Luis G., Ruschel-Dutra, Daniel, Rodríguez-Ardila, Alberto, Hernandez-Jimenez, Jose A., Steiner, João
We use Gemini integral field unit observations to map the stellar population properties in the inner region ($\sim680\times470$ pc$^2$) of the galaxy NGC 6868. In order to understand the physical and chemical properties of the stellar content of this
Externí odkaz:
http://arxiv.org/abs/2304.11194
Autor:
Missaglia, Valentina, Madrid, Juan P., Schirmer, Mischa, Massaro, Francesco, Rodriguez-Ardila, Alberto, Donzelli, Carlos J., Valencia, Martell, Paggi, Alessandro, Kraft, Ralph P., Stuardi, Chiara, Wilkes, Belinda J.
The environment of the high-redshift (z=1.408), powerful radio-loud galaxy 3C 297 has several distinctive features of a galaxy cluster. Among them, a characteristic halo of hot gas revealed by Chandra X-ray observations. In addition, a radio map obta
Externí odkaz:
http://arxiv.org/abs/2212.01707