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- catalog abstract "The speaker discusses two scenarios of the Extreme X-ray/Optical ratio sources ("EXO"s): (1) if they lie at low to moderate redshifts, then their host galaxies need to be exceedingly underluminous and/or excessively reddened compared with other AGN hosts; (2) if they lie such taht their Ly-alpha emission is redshifted out of the z-band filter, then their IR and X-ray properties can be accounted for in terms of relatively normal hosts and moderate-luminosity AGN in which case, these objects serve as a valuable probe of black hole growth and accretion activity in the early universe.".
- catalog alternative "Probes of the high redshift universe".
- catalog contributor b12981622.
- catalog contributor b12981623.
- catalog created "[2003]".
- catalog date "2003".
- catalog date "[2003]".
- catalog dateCopyrighted "[2003]".
- catalog description "Lecture held at Phillips Auditorium, Harvard College Observatory, October 2, 2003.".
- catalog description "The speaker discusses two scenarios of the Extreme X-ray/Optical ratio sources ("EXO"s): (1) if they lie at low to moderate redshifts, then their host galaxies need to be exceedingly underluminous and/or excessively reddened compared with other AGN hosts; (2) if they lie such taht their Ly-alpha emission is redshifted out of the z-band filter, then their IR and X-ray properties can be accounted for in terms of relatively normal hosts and moderate-luminosity AGN in which case, these objects serve as a valuable probe of black hole growth and accretion activity in the early universe.".
- catalog description "VHS.".
- catalog extent "1 videocassette (64 min.) :".
- catalog isPartOf "CfA colloquium".
- catalog issued "2003".
- catalog issued "[2003]".
- catalog language "eng".
- catalog requires "VHS.".
- catalog subject "Active galactic nuclei Observations.".
- catalog subject "Radio galaxies Observations.".
- catalog subject "Radio sources (Astronomy)".
- catalog subject "Red shift Observations.".
- catalog subject "X-ray sources, Galactic.".
- catalog title "Extreme x-ray/optical sources (EXOs) [videorecording] : probes of the high redshift universe / Anton Koekemoer.".
- catalog title "Probes of the high redshift universe".
- catalog type "Videotapes. local".
- catalog type "image".