Listar Ciencias Exactas y Naturales por autor "Hahn, Luis Gabriel Dahmer"

Mostrando ítems 1-17 de 17

    • Coronal-line forest active galactic nuclei I. Physical properties of the emission-line regions 

      Campos, Fernando Custodio Cerqueira; Rodriguez-Ardila, Alberto; Riffel, Rogério; Oliveira, Murilo Marinello Assis de; Allende Prieto, Carlos; Hahn, Luis Gabriel Dahmer (2021) [Artículo de periódico]
      Coronal-line forest (CLiF) active galactic nuclei (AGNs) are characterized by strong high-ionization lines, which contrasts with what is found in most AGNs. Here, we carry out a multiwavelength analysis aimed at understanding ...

    • Coronal line forest AGN : II. Analysis of the spectral energy distribution 

      Campos, Fernando Custodio Cerqueira; Rodriguez-Ardila, Alberto; Panda, Swayamtrupta; Riffel, Rogério; Hahn, Luis Gabriel Dahmer; Oliveira, Murilo Marinello Assis de (2023) [Artículo de periódico]
      Coronal-Line Forest Active Galactic Nuclei (CLiF AGN) are characterized by strong, high-ionization lines, which are in contrast to what is found in typical AGNs. Here, we carry out an infrared analysis aimed at understanding ...

    • Gemini NIFS survey of feeding and feedback in nearby active galaxies III. Ionized versus warm molecular gas masses and distributions 

      Schönell Júnior, Astor João; Storchi-Bergmann, Thaisa; Riffel, Rogemar André; Riffel, Rogério; Bianchin, Marina; Hahn, Luis Gabriel Dahmer; Diniz, Marlon Rodrigo; Dametto, Natacha Zanon (2019) [Artículo de periódico]
      We have used the Gemini Near-Infrared Integral Field Spectrograph in the J and K bands to map the distribution, excitation, and kinematics of the ionized H ii and warm molecular gas H2, in the inner few 100 pc of six nearby ...

    • Gemini NIFS survey of feeding and feedback in nearby active galaxies : IV. Excitation 

      Riffel, Rogemar André; Bianchin, Marina; Riffel, Rogério; Storchi-Bergmann, Thaisa; Schönell Júnior, Astor João; Hahn, Luis Gabriel Dahmer; Dametto, Natacha Zanon; Diniz, Marlon Rodrigo (2021) [Artículo de periódico]
      The near-infrared spectra of active galactic nuclei (AGN) present emission lines of different atomic and molecular species. The mechanisms involved in the origin of these emission lines in AGN are still not fully understood. ...

    • Gemini NIFS survey of feeding and feedback in nearby active galaxies V. Molecular and ionized gas kinematics 

      Bianchin, Marina; Riffel, Rogemar André; Storchi-Bergmann, Thaisa; Riffel, Rogério; Dutra, Daniel Ruschel; Harrison, Chris; Hahn, Luis Gabriel Dahmer; Mainieri, Vincenzo; Schönell Júnior, Astor João; Dametto, Natacha Zanon (2022) [Artículo de periódico]
      We study the gas distribution and kinematics of the inner kpc of six moderately luminous (43.43 ≤ log Lbol ≤ 44.83) nearby (0.004 ≤ z ≤ 0.014) Seyfert galaxies observed with the Near-infrared Integral Field Spectrograph ...

    • Gemini NIFS survey of feeding and feedback processes in nearby active galaxies : II. The sample and surface mass density profilesthe hidden monster and its outflow 

      Riffel, Rogemar André; Storchi-Bergmann, Thaisa; Riffel, Rogério; Davies, Richard I.; Bianchin, Marina; Diniz, Marlon Rodrigo; Schönell Júnior, Astor João; Burtscher, Leonard; Crenshaw, Daniel Michael; Fischer, Travis C.; Hahn, Luis Gabriel Dahmer; Dametto, Natacha Zanon; Rosario, David (2018) [Artículo de periódico]
      We present and characterize a sample of 20 nearby Seyfert galaxies selected for having BAT 14–195 keV luminosities LX ≥ 1041.5 erg s−1, redshift z ≤ 0.015, being accessible for observations with the Gemini Near-Infrared ...

    • Gemini NIFS survey of feeding and feedback processes in nearby active galaxies : I. Stellar kinematics 

      Riffel, Rogemar André; Storchi-Bergmann, Thaisa; Riffel, Rogério; Hahn, Luis Gabriel Dahmer; Diniz, Marlon Rodrigo; Schönell Júnior, Astor João; Dametto, Natacha Zanon (2017) [Artículo de periódico]
      We use the Gemini Near-Infrared Integral Field Spectrograph (NIFS) to map the stellar kinematics of the inner few hundred parsecs of a sample of 16 nearby Seyfert galaxies, at a spatial resolution of tens of parsecs and ...

    • Gemini NIFS survey of feeding and feedback processes in nearby active galaxies : VI. Stellar populations 

      Riffel, Rogério; Hahn, Luis Gabriel Dahmer; Riffel, Rogemar André; Storchi-Bergmann, Thaisa; Dametto, Natacha Zanon; Davies, Richard I.; Burtscher, Leonard; Bianchin, Marina; Dutra, Daniel Ruschel; Ricci, Claudio; Rosario, David (2022) [Artículo de periódico]
      We use Gemini Near-Infrared Integral Field Spectrograph (NIFS) adaptive optics assisted data cubes to map the stellar population of the inner few hundred parsec of a sample of 18 nearby Seyfert galaxies. The near-infrared ...

    • A Gemini–NIFS view of the merger remnant NGC 34 

      Motter, Juliana Cristina; Riffel, Rogério; Ricci, Tiago Vecchi; Riffel, Rogemar André; Storchi-Bergmann, Thaisa; Pastoriza, Miriani Griselda; Rodriguez-Ardila, Alberto; Dutra, Daniel Ruschel; Hahn, Luis Gabriel Dahmer; Dametto, Natacha Zanon; Diniz, Marlon Rodrigo (2021) [Artículo de periódico]
      The merger remnant NGC 34 is a local luminous infrared galaxy (LIRG) hosting a nuclear starburst and a hard X-ray source associated with a putative, obscured Seyfert 2 nucleus. In this work, we use adaptive optics assisted ...

    • Optical properties of Peaked Spectrum radio sources 

      Nascimento, Raquel Santiago; Rodriguez-Ardila, Alberto; Hahn, Luis Gabriel Dahmer; Faria, Marcos Antonio Fonseca; Riffel, Rogério; Oliveira, Murilo Marinello Assis de; Beuchert, Tobias; Callingham, Joseph (2022) [Artículo de periódico]
      In this work, we study the optical properties of compact radio sources selected from the literature in order to determine the impact of the radio-jet in their circumnuclear environment. Our sample includes 58 Compact Steep ...

    • A panchromatic spatially resolved study of the inner 500 pc of NGC 1052 : II. Gas excitation and kinematics 

      Hahn, Luis Gabriel Dahmer; Riffel, Rogério; Ricci, Tiago Vecchi; Steiner, João Evangelista; Storchi-Bergmann, Thaisa; Riffel, Rogemar André; Menezes, Roberto Bertoldo; Dametto, Natacha Zanon; Diniz, Marlon Rodrigo; Motter, Juliana Cristina; Dutra, Daniel Ruschel (2019) [Artículo de periódico]
      We map the optical and near-infrared (NIR) emission-line flux distributions and kinematics of the inner 320×535 pc2of the elliptical galaxy NGC 1052. The integral field spectra were obtained with the Gemini Telescope using ...

    • A panchromatic spatially resolved study of the inner 500 pc of NGC 1052 : I. Stellar population 

      Hahn, Luis Gabriel Dahmer; Riffel, Rogério; Steiner, João Evangelista; Riffel, Rogemar André; Menezes, Roberto Bertoldo; Ricci, Tiago Vecchi; Dametto, Natacha Zanon; Storchi-Bergmann, Thaisa; Diniz, Marlon Rodrigo (2019) [Artículo de periódico]
      We map optical and near-infrared (NIR) stellar population properties of the inner 320 × 535 pc2 of the elliptical galaxy NGC 1052. The optical and NIR spectra were obtained using the Gemini Integral Field Units of the GMOS ...

    • Probing evolutionary population synthesis models in the near infrared with early-type galaxies 

      Hahn, Luis Gabriel Dahmer; Riffel, Rogério; Rodriguez-Ardila, Alberto; Martins, Lucimara Pires; Kehrig, Carolina; Heckman, Timothy M.; Pastoriza, Miriani Griselda; Dametto, Natacha Zanon (2018) [Artículo de periódico]
      We performed a near-infrared (NIR; ∼1.0 –2.4 μm) stellar population study in a sample of early-type galaxies. The synthesis was performed using five different evolutionary population synthesis libraries of models. Our main ...

    • A SINFONI view of the nuclear activity and circumnuclear star formation in NGC4303-II. Spatially resolved stellar populations 

      Dametto, Natacha Zanon; Riffel, Rogério; Colina, Luis; Riffel, Rogemar André; Piqueras López, Javier; Davies, Richard I.; Burtscher, Leonard; Menezes, Roberto Bertoldo; Arribas, Santiago; Pastoriza, Miriani Griselda; Labiano, Alvaro; Storchi-Bergmann, Thaisa; Hahn, Luis Gabriel Dahmer; Sales, Dinalva Aires de (2019) [Artículo de periódico]
      We present a spatially resolved stellar population study of the inner∼200 pc radius ofNGC 4303 based on near-infrared integral field spectroscopy with SINFONI/VLT at a spatial resolution of 40–80 pc and using the STARLIGHT ...

    • Stellar populations in local AGNs : evidence for enhanced star formation in the inner 100 pc 

      Hahn, Luis Gabriel Dahmer; Riffel, Rogério; Rodriguez-Ardila, Alberto; Riffel, Rogemar André; Storchi-Bergmann, Thaisa; Oliveira, Murilo Marinello Assis de; Davies, Richard I.; Burtscher, Leonard; Dutra, Daniel Ruschel; Rosario, David (2022) [Artículo de periódico]
      In modern models and simulations of galactic evolution, the star formation in massive galaxies is regulated by an ad hoc active galactic nuclei (AGN) feedback process. However, the physics and the extension of such effects ...

    • The AGNIFS survey : distribution and excitation of the hot molecular and ionized gas in the inner kpc of nearby AGN hosts 

      Riffel, Rogemar André; Storchi-Bergmann, Thaisa; Riffel, Rogério; Bianchin, Marina; Zakamska, Nadia L.; Dutra, Daniel Ruschel; Schönell Júnior, Astor João; Rosario, David; Rodriguez-Ardila, Alberto; Fischer, Travis C.; Davies, Richard I.; Dametto, Natacha Zanon; Hahn, Luis Gabriel Dahmer; Crenshaw, Daniel Michael; Burtscher, Leonard; Bentz, Misty Cherie (2021) [Artículo de periódico]
      We use the Gemini NIFS instrument to map the H22.1218μm and Brγ flux distributions in the inner 0.04–2 kpc of a sample of 36 nearby active galaxies (0.001 ≲ z ≲ 0.056) at spatial resolutions from 4 to 250 pc. We find ...

    • The AGNIFS survey : spatially resolved observations of hot molecular and ionized outflows in nearby active galaxies 

      Riffel, Rogemar André; Storchi-Bergmann, Thaisa; Riffel, Rogério; Bianchin, Marina; Zakamska, Nadia L.; Dutra, Daniel Ruschel; Bentz, Misty Cherie; Burtscher, Leonard; Crenshaw, Daniel Michael; Hahn, Luis Gabriel Dahmer; Dametto, Natacha Zanon; Davies, Richard I.; Diniz, Marlon Rodrigo; Fischer, Travis C.; Harrison, Chris; Mainieri, Vincenzo; Revalski, Mitchell; Rodriguez-Ardila, Alberto; Rosario, David; Schönell Júnior, Astor João (2023) [Artículo de periódico]
      We present the hot molecular and warm ionized gas kinematics for 33 nearby (0.001 ≲ z ≲ 0.056) X-ray selected active galaxies using the H22.1218μ m and Br γ emission lines observed in the K band with the Gemini near-infrared ...