17
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: not found
      • Article: not found

      Implications ofz∼ 6 Quasar Proximity Zones for the Epoch of Reionization and Quasar Lifetimes

      Read this article at

      ScienceOpenPublisher
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Related collections

          Most cited references90

          • Record: found
          • Abstract: not found
          • Article: not found

          On the Density of Neutral Hydrogen in Intergalactic Space.

            Bookmark
            • Record: found
            • Abstract: found
            • Article: not found

            An ultraluminous quasar with a twelve-billion-solar-mass black hole at redshift 6.30

            So far, roughly 40 quasars with redshifts greater than z = 6 have been discovered. Each quasar contains a black hole with a mass of about one billion solar masses (10(9) M Sun symbol). The existence of such black holes when the Universe was less than one billion years old presents substantial challenges to theories of the formation and growth of black holes and the coevolution of black holes and galaxies. Here we report the discovery of an ultraluminous quasar, SDSS J010013.02+280225.8, at redshift z = 6.30. It has an optical and near-infrared luminosity a few times greater than those of previously known z > 6 quasars. On the basis of the deep absorption trough on the blue side of the Lyman-α emission line in the spectrum, we estimate the proper size of the ionized proximity zone associated with the quasar to be about 26 million light years, larger than found with other z > 6.1 quasars with lower luminosities. We estimate (on the basis of a near-infrared spectrum) that the black hole has a mass of ∼1.2 × 10(10) M Sun symbol, which is consistent with the 1.3 × 10(10) M Sun symbol derived by assuming an Eddington-limited accretion rate.
              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              Quasar ionization of Lyman-alpha clouds - The proximity effect, a probe of the ultraviolet background at high redshift

                Bookmark

                Author and article information

                Journal
                The Astrophysical Journal
                ApJ
                American Astronomical Society
                1538-4357
                May 01 2017
                May 02 2017
                : 840
                : 1
                : 24
                Article
                10.3847/1538-4357/aa6c60
                dfa7f421-0a5d-4c92-b83b-25727e0cb921
                © 2017
                History

                Comments

                Comment on this article