Navegação Ciências Exatas e da Terra por Assunto "Accretion, accretion discs"

Resultados 1-4 de 4

    • Evolution of the accretion disc around the supermassive black hole of NGC 7213 

      Schimoia, Jáderson da Silva; Storchi-Bergmann, Thaisa; Winge, Claudia; Nemmen, Rodrigo S.; Eracleous, Michael (2017) [Artigo de periódico]
      We present observations of the double-peaked broad Hα profile emitted by the active nucleus of NGC7213 using the Gemini South Telescope in 13 epochs between 2011 September 27 and 2013 July 23. This is the first time that ...

    • Models for jet power in elliptical galaxies : a case for rapidly spinning black holes 

      Nemmen, Rodrigo S.; Bower, Richard G.; Babul, Arif; Storchi-Bergmann, Thaisa (2007) [Artigo de periódico]
      The power of jets from black holes is expected to depend on both the spin of the black hole and the structure of the accretion disc in the region of the last stable orbit.We investigate these dependencies using two different ...

    • Spectral models for low-luminosity active galactic nuclei in LINERs : the role of advection-dominated accretion and jets 

      Nemmen, Rodrigo S.; Storchi-Bergmann, Thaisa; Eracleous, Michael (2014) [Artigo de periódico]
      We find evidence for a correlation between the accretion rate and jet power and an anticorrelation between the radio loudness and the accretion rate.We confirm previous findings that the radio emission is severely ...

    • The frequency of gaseous debris discs around white dwarfs 

      Manser, Christopher; Gänsicke, Boris; Fusillo, Nicola Pietro Gentile; Ashley, Richard P.; Breedt, Elmé; Hollands, Mark; Izquierdo, Paula; Pelisoli, Ingrid Domingos (2020) [Artigo de periódico]
      A total of 1–3 per cent of white dwarfs are orbited by planetary dusty debris detectable as infrared emission in excess above the white dwarf flux. In a rare subset of these systems, a gaseous disc component is also detected ...