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Title: A Large Population of Obscured AGN in Disguise as Low Luminosity AGN in Chandra Deep Field South
Authors: Erini Lambrides et al.
First Author’s Institution: Johns Hopkins University
Status: Submitted to ApJ
Light emanating from within a host galaxy travels a huge distance to reach an observer. Along its path, the photons can encounter obstacles that change their wavelength or diminish the total intensity of the light. Depending on the host galaxy’s orientation relative to Earth, said emission could even be impeded by material contained within the galaxy. This can make the identification and classification of the photon’s source much harder. Models predict that there are a huge number of active galactic nuclei (AGN) growing behind dense screens of gas and dust that surround their host galaxies. Deep X-ray surveys are thought to produce the most complete and unbiased surveys of the AGN population, but we have yet to observationally confirm ...