Browsing by Subject "Quasars: supermassive black holes"

Now showing items 1-4 of 4

    • 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 This includes 12 years of new unpublished observations (2003 to 2015).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, ...
    • Fast-Growing SMBHs in Fast-Growing Galaxies, at high redshifts: the role of Major Mergers as revealed by ALMA 
      Trakhtenbrot, Benny; Lira Teillery, Paulina; Netzer, Hagai; Cicone, Claudia; Maiolino, Roberto; Shemmer, Ohad (Osservatorio Astronomico di Padova (INAF), Italy, 2017)
      We present a long-term, multi-wavelength project to understand the epoch of fastest growth of the most massive black holes by using a sample of 40 luminous quasars at z similar or equal to 4.8. These quasars have rather ...
    • How AGN and SN Feedback Affect Mass Transport and Black Hole Growth in High-redshift Galaxies 
      Prieto, Joaquín; Escala Astorquiza, Andrés; Volonteri, Marta; Dubois, Yohan (Institute of Physics Publishing, 2017)
      Using cosmological hydrodynamical simulations, we study the effect of supernova (SN) and active galactic nucleus (AGN) feedback on the mass transport (MT) of gas onto galactic nuclei and the black hole (BH) growth down to ...