Browsing by Author "Mejía Restrepo, Julián"

Now showing items 1-4 of 4

    • Active galactic nuclei at z similar to 1.5-I. Spectral energy distribution and accretion discs 
      Capellupo, D. M.; Netzer, H.; Lira Teillery, Paulina; Trakhtenbrot, B.; Mejía Restrepo, Julián (Oxford University Press, 2015)
      The physics of active super massive black holes (BHs) is governed by their mass (MBH), spin (a(*)) , and accretion rate ((M) over dot). This work is the first in a series of papers with the aim of testing how these parameters ...
    • 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 ...
    • A New Look at Quasar Accretion Disks 
      Capellupo, Daniel M.; Netzer, Hagai; Lira Teillery, Paulina; Trakhtenbrot, Benny; Mejía Restrepo, Julián (International Astronomical Union, 2013)
      The physics of active black holes (BHs) is governed by three key parameters: their mass, spin, and accretion rate. Understanding the cosmic evolution of these parameters is crucial for tracing back the growth of the BHs ...
    • The QUEST-La Silla AGN Variability Survey: Connection between AGN Variability and Black Hole Physical Properties 
      Sánchez Sáez, Paula Andrea; Lira Teillery, Paulina; Mejía Restrepo, Julián; Ho, L.; Arévalo, P.; Kim, M.; Cartier, R.; Coppi, P. (Institute of Physics Publishing, 2018)
      We present our statistical analysis of the connection between active galactic nuclei (AGN) variability and physical properties of the central supermassive black hole (SMBH). We constructed optical light curves using data ...