Browsing Exact and Earth Sciences by Subject "Quasars: emission lines"

Now showing items 1-8 of 8

    • A 0.8-2.4 μm spectral atlas of active galactic nuclei 

      Riffel, Rogemar André; Rodriguez-Ardila, Alberto; Pastoriza, Miriani Griselda (2006) [Journal article]
      Aims. We present a near-infrared spectral atlas of 47 active galactic nuclei (AGN) of all degrees of activity in the wavelength interval of 0.8–2.4 μm, including the fluxes of the observed emission lines. We analyze the ...

    • Bipolar ionization cones in the extended narrow-line region of nearby QSO2s 

      Storchi-Bergmann, Thaisa; Oliveira, Bruno Dall'Agnol de; Micchi, L. F. Longo; Schmitt, Henrique Roberto; Fischer, Travis C.; Kraemer, S. B.; Crenshaw, Daniel Michael; Maksym, W. Peter; Elvis, Martin; Fabbiano, Giuseppina; Colina, Luis (2018) [Journal article]
      We have used narrowband [O III] λλ4959, 5007 and Hα+[N II] λλ6548, 84 Hubble Space Telescope (HST) images of nine luminous (L[O III]>1042 erg s−1) type 2 QSOs with redshifts 0.1<z<0.5 in order to constrain the geometry of ...

    • Discovery of two gravitationally lensed quasars in the Dark Energy Survey 

      Agnello, Adriano; Treu, Tommaso; Ostrovski, F.; Schechter, Paul L.; Buckley-Geer, Elizabeth; Lin, H.; Auger, Matthew W.; Courbin, Frederic Y. M.; Fassnacht, Christopher D.; Frieman, Joshua A.; Kuropatkin, Nikolay P.; Marshall, Phillip J.; McMahon, Richard G.; Meylan, Georges; More, Andrew Mills; Suyu, Sherry; Rusu, Cristian Eduard; Finley, David A.; Abbott, Timothy M. C.; Abdalla, Filipe B.; Allam, Sahar S.; Annis, James T.; Banerji, M.; Benoit-Lévy, Aurélien; Bertin, Emmanuel; Brooks, D.; Burke, David Lyle; Carnero Rosell, Aurelio; Carrasco Kind, Matías; Carretero Palacios, Jorge; Cunha, Carlos Eduardo; D'Andrea, Christopher B.; Costa, Luiz N. da; Desai, S.; Diehl, H. Thomas; Dietrich, Jörg P.; Doel, Peter; Eifler, Tim; Estrada, Juan; Fausti Neto, Angelo; Flaugher, Brenna; Fosalba Vela, Pablo; Gerdes, David W.; Gruen, Daniel; Gutierrez, Gaston R.; Honscheid, K.; James, David J.; Kent, Stephen M.; Kuehn, Kyler; Kuropatkin, Nikolay P.; Lahav, Ofer; Lima, Marcos Vinicius Borges Teixeira; Maia, Marcio Antonio Geimba; March, Marisa Cristina; Marshall, Jennifer L.; Martini, Paul; Melchior, Peter M.; Miller, Christopher J.; Miquel, Ramon; Nichol, Robert C.; Ogando, Ricardo L.C.; Plazas Malagón, Andrés Alejandro; Reil, Kevin; Romer, Anita K.; Roodman, Aaron; Sako, Masao; Sanchez-Alvaro, Eusebio; Santiago, Basilio Xavier; Scarpine, Victor Emanuel; Schubnell, Michael; Sevilla Noarbe, Ignacio; Smith, Robert Christopher; Soares-Santos, Marcelle; Sobreira, Flávia; Suchyta, Eric; Swanson, Molly E. C.; Tarle, Gregory; Thaler, Jon J.; Tucker, Douglas L.; Walker, Alistair; Wechsler, Risa H.; Zhang, Yuanyuan (2015) [Journal article]
      We present spectroscopic confirmation of two new gravitationally lensed quasars, discovered in the Dark Energy Survey (DES) and Wide-field Infrared Survey Explorer (WISE) based on their multiband photometry and extended ...

    • Gauging the effect of supermassive black holes feedback on quasar host galaxies 

      Oliveira, Bruno Dall'Agnol de; Storchi-Bergmann, Thaisa; Kraemer, S. B.; Villar-Martín, Montse; Müller, Allan Schnorr; Schmitt, Henrique Roberto; Dutra, Daniel Ruschel; Crenshaw, Daniel Michael; Fischer, Travis C. (2021) [Journal article]
      In order to gauge the role that active galactic nuclei play in the evolution of galaxies via the effect of kinetic feedback in nearby QSO 2’s (z ∼ 0.3), we observed eight such objects with bolometric luminosities Lbol∼1046ergs−1 ...

    • On the black hole mass of the γ-ray emitting narrow-line Seyfert 1 galaxy 1H 0323+342 

      Landt, Hermine; Ward, Martin John; Baloković, Mislav; Kynoch, Daniel; Storchi-Bergmann, Thaisa; Boisson, Catherine; Done, Chris; Schimoia, Jáderson da Silva; Stern, Daniel (2017) [Journal article]
      Narrow-line Seyfert 1 galaxies have been identified by the Fermi Gamma-Ray Space Telescope as a rare class of γ -ray emitting active galactic nuclei. The lowest redshift candidate among them is the source 1H 0323+342. Here ...

    • On the nature of Seyfert galaxies with high [O III] λ5007 blueshifts 

      Komossa, S.; Xu, D.; Zhou, H.; Storchi-Bergmann, Thaisa; Binette, Luc (2008) [Journal article]
      We have studied the properties of Seyfert galaxies with high [O III] λ5007 blueshifts (‘‘blue outliers’’), originally identified because of their strong deviation from the MBH-σ relation of normal, narrow-line Seyfert 1 ...

    • The first spectroscopic dust reverberation programme on active galactic nuclei : the torus in NGC 5548 

      Landt, Hermine; Ward, Martin John; Kynoch, Daniel; Packham, Christopher; Ferland, Gary J.; Lawrence, Andy; Pott, Jörg-Uwe; Esser, Johannes; Horne, Keith; Starkey, David A.; Malhotra, Deepak; Fausnaugh, Michael; Peterson, Bradley M.; Wilman, Richard J.; Riffel, Rogemar André; Storchi-Bergmann, Thaisa; Barth, Aaron J.; Villforth, Carolin; Winkler, Hartmut (2019) [Journal article]
      We have recently initiated the first spectroscopic dust reverberation programme on active galactic nuclei in the near-infrared. Spectroscopy enables measurement of dust properties, such as flux, temperature, and covering ...

    • The miniJPAS survey : detection of the double-core Lyα morphology for two high-redshift QSOs 

      Rahna, P. T.; Chies-Santos, Ana Leonor; JPAS team (2022) [Journal article]
      Context. The Lyα emission is an important tracer of neutral gas in a circum-galactic medium (CGM) around high-z quasi-stellar objects (QSOs). The origin of Lyα emission around QSOs is still under debate, bringing on ...