Now showing items 1-16 of 16

    • An embedded active nucleus in the OH megamaser galaxy IRAS16399-0937 

      Sales, Dinalva Aires de; Robinson, Andrew; Axon, David J.; Gallimore, Jack F.; Kharb, Preeti; Curran, R. L.; O'Dea, Christopher Peter; Baum, Stefi Alison; Elitzur, Moshe; Mittal, Rupal (2015) [Journal article]
      We present a multiwavelength study of the OH megamaser galaxy IRAS16399−0937, based on new Hubble Space Telescope (HST)/Advanced Camera for Surveys F814W and Hα+[N ii] images and archive data from HST, Two Micron All Sky ...
    • Destruction and multiple ionization of PAHs by X-rays in circumnuclear regions of AGNs 

      Monfredini, Thiago; Quitián-Lara, Heidy M.; Fantuzzi, Felipe; Wolff, Wania; Mendoza, Edgar; Lago, Alexsandre F.; Sales, Dinalva Aires de; Pastoriza, Miriani Griselda; Roberty, Heloísa Maria Boechat (2019) [Journal article]
      The infrared signatures of polycyclic aromatic hydrocarbons (PAHs) are observed in a variety of astrophysical objects, including the circumnuclear medium of active galactic nuclei (AGNs). These are sources of highly energetic ...
    • Gemini IFU, VLA, and HST observations of the OH Megamaser Galaxy IRAS17526 + 3253 

      Sales, Dinalva Aires de; Robinson, Andrew; Riffel, Rogemar André; Storchi-Bergmann, Thaisa; Gallimore, Jack F.; Kharb, Preeti; Baum, Stefi Alison; O’Dea, Christopher; Carpes, Hekatelyne Prestes; Ferrari, Fabricio (2019) [Journal article]
      We present a multiwavelength study of the OH megamaser galaxy IRAS17526 + 3253, based on new Gemini multi-object spectrograph integral field unit (GMOS/IFU) observations, Hubble Space Telescope F814W, and H α + [N II] ...
    • Gemini IFU, VLA, and HST observations of the OH megamaser galaxy IRAS F23199 + 0123 : the hidden monster and its outflow 

      Carpes, Hekatelyne Prestes; Riffel, Rogemar André; Sales, Dinalva Aires de; Robinson, Andrew; Gallimore, Jack F.; Storchi-Bergmann, Thaisa; Kharb, Preeti; O’Dea, Christopher; Baum, Stefi Alison (2018) [Journal article]
      We present Gemini Multi-Object Spectrograph (GMOS) Integral field Unit (IFU), Very Large Array (VLA), and Hubble Space Telescope (HST) observations of the OH megamaser (OHM) galaxy IRAS F23199+0123. Our observations show ...
    • High spatial resolution of the mid-infrared emission of the Compton-thick type 2 Seyfert galaxy, Markarian 3 

      Sales, Dinalva Aires de; Dutra, Daniel Ruschel; Pastoriza, Miriani Griselda; Riffel, Rogério; Winge, Claudia (2014) [Journal article]
      The mid-infrared (MIR) spectra observed with Gemini/Michelle have been used to study the nuclear region of the Compton-thick type 2 Seyfert galaxy, Markarian 3 (Mrk 3), at a spatial resolution of ∼200 pc. No polycyclic ...
    • A mid-IR comparative analysis of the Seyfert galaxies NGC 7213 and NGC 1386 

      Dutra, Daniel Ruschel; Pastoriza, Miriani Griselda; Riffel, Rogério; Sales, Dinalva Aires de; Winge, Claudia (2014) [Journal article]
      New Gemini mid-infrared spectroscopic observations together with Spitzer Space telescope archival data are used to study the properties of the dusty torus and circumnuclear star formation in the active galaxies NGC 7213 ...
    • Optical and mid-infrared neon abundance determinations in star-forming regions 

      Dors Júnior, Oli Luiz; Hägelle, Guillermo Federico; Cardaci, Mónica V.; Pérez-Montero, Enrique; Krabbe, Angela Cristina; Vilchez, Jose M.; Sales, Dinalva Aires de; Riffel, Rogério; Riffel, Rogemar André (2013) [Journal article]
      We have used observational spectroscopic data of star-forming regions compiled from the literature and photoionization models to analyse the neon ionic abundances obtained using both optical and mid-infrared emission lines. ...
    • Polycyclic aromatic hydrocarbon and emission line ratios in active galactic nuclei and starburst galaxies 

      Sales, Dinalva Aires de; Pastoriza, Miriani Griselda; Riffel, Rogério (2010) [Journal article]
      We study the polycyclic aromatic hydrocarbon (PAH) bands, ionic emission lines, and mid-infrared continuum properties in a sample of 171 emission line galaxies taken from the literature plus 15 new active galactic nucleus ...
    • Polycyclic aromatic hydrocarbon in the central region of the Seyfert 2 galaxy NGC 1808 

      Sales, Dinalva Aires de; Pastoriza, Miriani Griselda; Riffel, Rogério; Winge, Claudia (2013) [Journal article]
      We present mid-infrared spectra of the Seyfert 2 galaxy NGC 1808, obtained with the Gemini’s Thermal-Region Camera Spectrograph at a spatial resolution of ∼26 pc. The high spatial resolution allowed us to detect bright ...
    • Probing the active galactic nucleus unified model torus properties in Seyfert galaxies 

      Audibert, Anelise; Riffel, Rogério; Sales, Dinalva Aires de; Pastoriza, Miriani Griselda; Dutra, Daniel Ruschel (2017) [Journal article]
      We studied the physical parameters of a sample comprising of all Spitzer/Infrared Spectrograph public spectra of Seyfert galaxies in the mid-infrared (5.2–38 μm range) under the active galactic nucleus (AGN) unified model. ...
    • A SINFONI view of the nuclear activity and circumnuclear star formation in NGC 4303 

      Riffel, Rogemar André; Colina, Luis; Storchi-Bergmann, Thaisa; Piqueras López, Javier; Arribas, Santiago; Riffel, Rogério; Pastoriza, Miriani Griselda; Sales, Dinalva Aires de; Dametto, Natacha Zanon; Labiano, Alvaro; Davies, Richard I. (2016) [Journal article]
      We present new maps of emission-line flux distributions and kinematics in both ionized (traced by HI and [Fe II] lines) and molecular (H2) gas of the inner 0.7 × 0.7 kpc2 of the galaxy NGC 4303, with a spatial resolution ...
    • 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) [Journal article]
      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 ...
    • Star formation and gas inflows in the OH megamaser galaxy IRAS03056+2034 

      Carpes, Hekatelyne Prestes; Riffel, Rogemar André; Sales, Dinalva Aires de; Robinson, Andrew; Storchi-Bergmann, Thaisa; Kharb, Preeti; Gallimore, Jack F.; Baum, Stefi Alison; O'Dea, Christopher Peter (2018) [Journal article]
      We have obtained observations of the OH megamaser galaxy IRAS03056+2034 using the Gemini Multi-Object Spectrograph (GMOS) Integral Field Unit (IFU), Very Large Array (VLA), and Hubble Space Telescope (HST). The HST data ...
    • The compton-thick Seyfert 2 nucleus of NGC 3281 torus constraints from the 9.7μm silicate absorption 

      Sales, Dinalva Aires de; Pastoriza, Miriani Griselda; Riffel, Rogério; Winge, Claudia; Rodriguez-Ardila, Alberto; Carciofi, Alex Cavaliéri (2011) [Journal article]
      We present mid-infrared (mid-IR) spectra of the Compton-thick Seyfert 2 galaxy NGC 3281, obtained with the Thermal-Region Camera Spectrograph at the Gemini-South telescope. The spectra present a very deep silicate absorption ...
    • Understanding the two-dimensional ionization structure in luminous infrared galaxies : a near-IR integral field spectroscopy perspective 

      Colina, Luis; Piqueras López, Javier; Arribas Mocoroa, Santiago; Riffel, Rogério; Riffel, Rogemar André; Rodriguez-Ardila, Alberto; Pastoriza, Miriani Griselda; Storchi-Bergmann, Thaisa; Alonso-Herrero, Almudena; Sales, Dinalva Aires de (2015) [Journal article]
      We investigate the two-dimensional excitation structure of the interstellar medium (ISM) in a sample of luminous infrared galaxies (LIRGs) and Seyferts using near-IR integral field spectroscopy. This study extends to the ...
    • Variations in the 6.2 μm emission profile in starburst-dominated galaxies : a signature of polycyclic aromatic nitrogen heterocycles (PANHs)? 

      Canelo, Carla Martinez; Friaça, Amâncio César Santos; Sales, Dinalva Aires de; Pastoriza, Miriani Griselda; Dutra, Daniel Ruschel (2018) [Journal article]
      Analyses of the polycyclic aromatic hydrocarbon (PAH) feature profiles, especially the 6.2 μm feature, could indicate the presence of nitrogen incorporated in their aromatic rings. In thiswork, 155 predominantly ...