Browsing by Subject "Galaxies: nuclei"

Now showing items 1-16 of 16

    • Can we improve CIV-based single-epoch black hole mass estimations? 
      Mejía Restrepo, Julián; Trakhtenbrot, B.; Lira Teillery, Paulina; Netzer, H. (Oxford University Press, 2018)
      In large optical surveys at high redshifts (z > 2), the C IV λ1549 broad emission line is the most practical alternative to estimate the mass (MBH) of active supermassive black holes. However, mass determinations obtained ...
    • Evidence for Periodicity in 43 Year-Long Monitoring of NGC 5548 
      Bon, Edi; Zucker, S.; Netzer, H.; Marziani, Paola; Bon, N.; Jovanovic, Predrag; Shapovalova, A. I.; Komossa, S.; Gaskell, C. M.; Popović, Ljiljana; Britzen, Stefan; Chavushyan, V. H.; Burenkov, A.; Sergeev, S. G.; La Mura, Giovanni; Valdés, J. R.; Stalevski, Marko (IOP, 2016)
      We present an analysis of 43 years (1972 to 2015) of spectroscopic observations of the Seyfert 1 galaxy NGC 5548. This includes 12 years of new unpublished observations (2003 to 2015). We compiled about 1600 H beta spectra ...
    • Faint Cosmos AGNs AT z ∼ 3.3. I. Black Hole Properties and Constraints on Early Black Hole Growth 
      Trakhtenbrot, Benny; Civano, F.; Urry, C. Megan; Schawinski, Kevin; Marchesi, Simone; Elvis, M. S.; Rosario, D. J.; Suh, H.; Mejía-Restrepo, Julian; Simmons, B. D.; Faisst, Andreas; Onodera, M. (IOP, 2016)
      We present new Keck/MOSFIRE K-band spectroscopy for a sample of 14 faint, X-ray-selected active galactic nuclei (AGNs) in the COSMOS field. The data cover the spectral region surrounding the broad Balmer emission lines, ...
    • Gap formation and its consequence in the evolution of SMBHs binaries in galaxy mergers 
      Valle, L. del; Escala Astorquiza, Andrés (Wiley & Sons, 2015)
      Motivated by the theoretical and observational evidence that after a major merger of gas-rich galaxies a massive gaseous disk with a SMBH binary will be formed in the nuclear region of the remnant, we study the interaction ...
    • Integral-Field Stellar and Ionized Gas Kinematics of Peculiar Virgo Cluster Spiral Galaxies 
      Cortés López, Juan; Kenney, Jeffrey; Hardy Raskovan, Eduardo (American Astronomical Society, 2015)
      We present the stellar and ionized gas kinematics of 13 bright peculiar Virgo cluster galaxies observed with the DensePak Integral Field Unit at the WIYN 3.5m telescope in order to look for kinematic evidence that ...
    • The nuclear near-infrared spectral properties of nearby galaxies 
      Mason, R.; Rodríguez Ardila, A.; Martins, L.; Riffel, R.; González Martín, Omaira; Ramos Almeida, C.; Ruschel Dutra, D.; Ho, L.; Thanjavur, K.; Flohic, H.; Alonso Herrero, A.; Lira Teillery, Paulina; McDermid, R.; Riffel, R.; Schiavon, R.; Winge, C.; Hoenig, M.; Perlman, E. (IOP Publishing, 2015)
      We present spectra of the nuclear regions of 50 nearby (D = 1-92 Mpc, median = 20 Mpc) galaxies of morphological types E to Sm. The spectra, obtained with the Gemini Near-IR Spectrograph on the Gemini North telescope, cover ...
    • Space telescope and optical reverberation mapping project. I. Ultraviolet observations of the seyfert 1 ... 
      Rosa, G. de; Peterson, B. M.; Ely, J.; Kriss, G. A.; Crenshaw, D. M.; Horne, Keith; Korista, K. T.; Netzer, H.; Pogge, R. W.; Arévalo, P.; Barth, A. J.; Bentz, M. C.; Brandt, W. N.; Breeveld, A. A.; Brewer, B. J.; Dalla Bontà, E.; Lorenzo Cáceres, A. de; Denney, K. D.; Dietrich, M.; Edelson, R.; Evans, P. A.; Fausnaugh, M. M.; Gehrels, N.; Gelbord, J. M.; Goad, M. R.; Grier, C. J.; Grupe, D.; Hall, P. B.; Kaastra, J.; Kelly, B. C.; Kennea, J. A.; Kochanek, C. S.; Lira Teillery, Paulina; Mathur, S.; McHardy, I. M.; Nousek, J. A.; Pancoast, A.; Papadakis, I.; Pei, L.; Schimoia, J. S.; Siegel, M.; Starkey, D.; Treu, T.; Uttley, P.; Vaughan, S.; Vestergaard, M.; Villforth, C.; Yan, H.; Young, S.; Zu, Y. (IOP Publishing, 2015)
      We describe the first results from a six-month long reverberation-mapping experiment in the ultraviolet based on 171 observations of the Seyfert 1 galaxy NGC 5548 with the Cosmic Origins Spectrograph on the Hubble Space ...
    • Space telescope and optical reverberation mapping project. II. Swift and hst reverberation mapping of the ... 
      Edelson, R.; Gelbord, J. M.; Horne, K.; McHardy, I. M.; Peterson, B. M.; Arévalo, P.; Breeveld, A. A.; Rosa, G. de; Evans, P. A.; Goad, M. R.; Kriss, G. A.; Brandt, W.N.; Gehrels, N.; Grupe, D.; Kennea, J. A.; Kochanek, C. S.; Nousek, J. A.; Papadakis, I.; Siegel, M.; Starkey, D.; Uttley, P.; Vaughan, S.; Young, S.; Barth, A. J.; Bentz, M. C.; Brewer, B. J.; Crenshaw, D. M.; Dalla Bontà, E.; Lorenzo Cáceres, A. de; Denney, K. D.; Dietrich, M.; Ely, J.; Fausnaugh, M. M.; Grier, C. J.; Hall, P. B.; Kaastra, J.; Kelly, B. C.; Korista, K. T.; Lira Teillery, Paulina; Mathur, S.; Netzer, H.; Pancoast, A.; Pei, L.; Pogge, R. W.; Schimoia, J. S.; Treu, T.; Vestergaard, M.; Villforth, C.; Yan, H.; Zu, Y. (IOP Publishing, 2015)
      Recent intensive Swift monitoring of the Seyfert 1 galaxy NGC 5548 yielded 282 usable epochs over 125 days across six UV/optical bands and the X-rays. This is the densest extended active galactic nucleus (AGN) UV/optical ...
    • Space telescope and optical reverberation mapping project. III optical continuum emission and broadband ... 
      Fausnaugh, M. M.; Denney, K. D.; Barth, A. J.; Bentz, M. C.; Bottorff, M. C.; Carini, M. T.; Croxall, K. V.; Rosa, G. de; Goad, M. R.; Horne, Keith; Joner, M. D.; Kaspi, S.; Kim, M.; Klimanov, S. A.; Kochanek, C. S.; Leonard, D. C.; Netzer, H.; Peterson, B. M.; Schnulle, K.; Sergeev, S. G.; Vestergaard, M.; Zheng, W.-K; Zu, Y.; Anderson, M. D.; Arévalo, P.; Bazhaw, C.; Borman, G. A.; Boroson, T. A.; Brandt, W. N.; Breeveld, A. A.; Brewer, B. J.; Cackett, E. M.; Crenshaw, D. M.; Dalla Bonta, E.; Lorenzo Cáceres, A. de; Dietrich, M.; Edelson, R.; Efimova, N. V.; Ely, J.; Evans, P. A.; Filippenko, A. V.; Flatland, K.; Gehrels, N.; Geier, S.; Gelbord, J. M.; González, L.; Gorjian, V.; Grier, C. J.; Grupe, D.; Hall, P. B.; Hicks, S.; Horenstein, D.; Hutchison, T.; Im, M.; Jensen, J. J.; Jones, J.; Kaastra, J.; Kelly, B. C.; Kennea, J. A.; Kim, S. C.; Korista, K. T.; Kriss, G. A.; Lee, J. C.; Lira Teillery, Paulina; MacInnis, F.; Manne-Nicholas, E. R.; McHardy, I. M.; Montouri, C.; Musso, R.; Nazarov, S. V.; Norris, R. P.; Nousek, J. A.; Okhmat, D. N.; Pancoast, A.; Papadakis, I.; Parks, J. R.; Pei, L.; Pogge, R. W.; Pott, J.-U; Rafter, S. E.; Rix, H. -W.; Saylor, D. A.; Schimoia, J. S.; Siegel, M.; Spencer, M.; Starkey, D.; Sung, H. -I.; Teems, K. G.; Treu, T.; Turner, C. S.; Uttley, P.; Villforth, C.; Weiss, Y.; Woo, J. -H; Yan, H.; Young, S. (IOP Publisihing, 2016)
      We present ground-based optical photometric monitoring data for NGC 5548, part of an extended multiwavelength reverberation mapping campaign. The light curves have nearly daily cadence from 2014 January to July in ...
    • Spectropolarimetry of NGC 3783 and Mrk 509: evidence for powerful nuclear winds in Seyfert 1 galaxies 
      Lira Teillery, Paulina María; Kishimoto, M.; Goosmann, R. W.; Campos, R.; Axon, D.; Elvis, M.; Lawrence, A.; Peterson, B. M.; Robinson, A. (Oxford, 2021)
      We present results from high signal-to-noise optical spectropolarimetric observations of the Seyfert 1 galaxies NGC3783 and Mrk 509 in the 3500-7000 angstrom range. We find complex structure in the polarized emission for ...
    • Super massive black holes in star forming gaseous circumnuclear discs 
      Valle, L. del; Escala Astorquiza, Andrés; Maureira Fredes, C.; Molina, J.; Cuadra, J.; Amaro Seoane, P. (2015)
      Using N􀀀body/SPH simulations we study the evolution of the separation of a pair of SMBHs embedded in a star forming circumnuclear disk (CNDa). This type of disk is expected to be formed in the central kilo parsec of the ...
    • The complex, dusty narrow-line region of NGC 4388: Gas-jet interactions, outflows and extinction revealed ... 
      Rodríguez Ardila, A.; Mason, R. E.; Martins, L.; Ramos Almeida, C.; Riffel, R. A.; Riffel, R.; Lira Teillery, Paulina; González Martín, O.; Dametto, N. Z.; Flohic, H.; Ho, L. C.; Ruschel Dutra, D.; Thanjavur, K.; Colina, L.; McDermid, R. M.; Perlman, E.; Winge, C. (Oxford University, 2017)
      We present Gemini/GNIRS (Gemini Near-Infrared Spectrograph) spectroscopy of the Seyfert2 galaxy NGC 4388, with simultaneous coverage from 0.85 to 2.5μm. Several spatiallyextended emission lines are detected for the first ...
    • The dust covering factor in active galactic nuclei 
      Stalevski, Marko; Ricci, Claudio; Ueda, Yoshihiro; Lira Teillery, Paulina; Fritz, Jacopo; Baes, Maarten (Oxford Univ Press, 2016)
      The primary source of emission of active galactic nuclei (AGNs), the accretion disc, is surrounded by an optically and geometrically thick dusty structure ('the so-called dusty torus'). The infrared radiation emitted by ...
    • The origin of UV-optical variability in AGN and test of disc models: XMM-Newton and ground-based observations ... 
      McHardy, I. M.; Connolly, S. D.; Peterson, B. M.; Bieryla, A.; Chand, H.; Elvis, M. S.; Emmanoulopoulos, D.; Falco, E.; Kaspi, S.; Latham, D.; Lira Teillery, Paulina; McCully, C.; Netzer, H.; Uemura, M. (Wiley, 2016)
      The origin of short timescale (weeks/months) variability of AGN, whether due to intrinsic disc variations or reprocessing of X-ray emission by a surrounding accretion disc, has been a puzzle for many years. However recently ...
    • Type 2 AGN host galaxies in the Chandra-COSMOS Legacy Survey: No evidence of AGN-driven Quenching 
      Suh, Hyewon; Civano, Francesca; Hasinger, Guenther; Lusso, Elisabeta; Lanzuisi, Giorgio; Marchesi, Stefano; Trakhtenbrot, Benny; Allevato, Viola; Cappelluti, Nico; Capak, Peter L.; Elvis, Martin; Griffiths, Richard E.; Laigle, Clotilde; Lira Teillery, Paulina; Riguccini, Laurie; Rosario, David J.; Salvato, Mara; Schawinski, Kevin; Vignali, Cristian (IOP Publishing, 2017-06-01)
      We investigate the star formation properties of a large sample of similar to 2300 X-ray-selected Type 2 Active Galactic Nuclei (AGNs) host galaxies out to z similar to 3 in the Chandra COSMOS Legacy Survey in order to ...
    • Warm ionized gas in CALIFA early-type galaxies 2D emission-line patterns and kinematics for 32 galaxies 
      Gomes, J.M.; Papaderos, P.; Kehrig, C.; Vílchez, J. M.; Lehnert, M. D.; Sánchez, S. F.; Ziegler, B.; Breda, I.; dos Reis, S.N.; Iglesias-Páramo, J.; Bland-Hawthorn, J.; Galbany, Lluis; Bomans, D. J.; Rosales-Ortega, F. F.; Cid Fernandes, R.; Walcher, C. J.; Falcón Barroso, J.; García-Benito, R.; Márquez, I.; Olmo, A. del; Masegosa, J.; Mollá, M.; Marino, R. A.; González Delgado, R. M.; López Sánchez, Ángel R. (ESO, 2016-04)
      Context. The morphological, spectroscopic, and kinematical properties of the warm interstellar medium (wim) in early-type galaxies (ETGs) hold key observational constraints to nuclear activity and the buildup history of ...