Exploratory Chandra observation of the ultraluminous quasar SDSS J010013.02+280225.8 at redshift 6.30

May 17, 2016
4 pages
Published in:
  • Astrophys.J.Lett. 823 (2016) 2, L37
  • Published: Jun 1, 2016
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Abstract: (IOP)
We report exploratory Chandra observations of the ultraluminous quasar SDSS J010013.02+280225.8 at redshift 6.30. The quasar is clearly detected by Chandra with a possible component of extended emission. The rest-frame 2–10 keV luminosity is 9.04.5+9.1×{9.0}_{-4.5}^{+9.1}\,\times 10(45) erg s(−)(1) with an inferred photon index of Γ = 3.030.70+0.78{3.03}_{-0.70}^{+0.78}. This quasar is X-ray bright, with an inferred X-ray-to-optical flux ratio αox{\alpha }_{\mathrm{ox}} =1.220.05+0.07=\,-{1.22}_{-0.05}^{+0.07}, higher than the values found in other quasars of comparable ultraviolet luminosity. The properties inferred from this exploratory observation indicate that this ultraluminous quasar might be growing with super-Eddington accretion and probably viewed with a small inclination angle. Deep X-ray observations will help to probe the plausible extended emission and better constrain the spectral features for this ultraluminous quasar.
Note:
  • to be published in ApJL
  • quasars: individual