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Contribution Of Stellar Tidal Disruptions To The X-Ray Luminosity Function Of Active Galaxies, Miloš Milosavljević, David Merritt, Luis C. Ho
Contribution Of Stellar Tidal Disruptions To The X-Ray Luminosity Function Of Active Galaxies, Miloš Milosavljević, David Merritt, Luis C. Ho
Articles
The luminosity function of active galactic nuclei has been measured down to luminosities ∼ 1042 ergs s-1 in the soft and hard X-rays. Some fraction of this activity is associated with the accretion of the material liberated by the tidal disruption of stars by massive black holes. We estimate the contribution to the X-ray luminosity function from the tidal disruption process. While the contribution depends on a number poorly known parameters, it appears that it can account for the majority of X-ray selected AGN with soft or hard Xray luminosities . 1043 - 1044 ergs s-1. If this is correct, …
Atomic Hydrogen In The One-Sided "Compact Double" Radio Galaxy 2050+364, Rene C. Vermeulen, Alvaro Labiano, Peter D. Barthel, Stefi A. Baum, W. H. De Vries, Christopher P. O'Dea
Atomic Hydrogen In The One-Sided "Compact Double" Radio Galaxy 2050+364, Rene C. Vermeulen, Alvaro Labiano, Peter D. Barthel, Stefi A. Baum, W. H. De Vries, Christopher P. O'Dea
Articles
European VLBI Network spectral imaging of the “compact double” radio source 2050+364 in the UHF band at 1049 MHz has resolved the HI absorbing region, and has shown a faint continuum component to the North (N), in addition to the well-known East-West double (E, W). Re-examination of VLBI continuum images at multiple frequencies suggests that 2050+364 may well be a one-sided core-jet source, which appears as a double over a limited frequency range. One of the dominant features,W, would then be the innermost visible portion of the jet, and could be at or adjacent to the canonical radio core. The …
Hi Absorption In 3c 49 And 3c 268.3. Probing The Environment Of Compact Steep Spectrum And Ghz Peaked Spectrum Sources, Alvaro Labiano, Rene C. Vermeulen, Peter D. Barthel, Christopher P. O'Dea, J. F. Gallimore, Stefi A. Baum, W. De Vries
Hi Absorption In 3c 49 And 3c 268.3. Probing The Environment Of Compact Steep Spectrum And Ghz Peaked Spectrum Sources, Alvaro Labiano, Rene C. Vermeulen, Peter D. Barthel, Christopher P. O'Dea, J. F. Gallimore, Stefi A. Baum, W. De Vries
Articles
We present and discuss European VLBI Network UHF band spectral line observations, made to localise the redshifted 21cm HI absorption known to occur in the subgalactic sized compact steep spectrum galaxies 3C 49 and 3C 268.3. We have detected HI absorption towards the western radio lobe of 3C 49 and the northern lobe of 3C 268.3. However, we cannot rule out the presence of similar amounts of HI towards the opposite and much fainter lobes. The radio lobes with detected HI absorption (1) are brighter and closer to the core than the opposite lobes; (2) are depolarized; and (3) are …