The X-ray Spectrum of the z=6.30 QSO SDSS J1030+0524

Details The X-ray Spectrum of the z=6.30 QSO SDSS J1030+0524 The X-ray Spectrum of the z=6.30 QSO SDSS J1030+0524

2004-06-24

arxiv.org/abs/astro-ph/0406561v1

Astrophys.J. 611 (2004) L13-L16

Astronomy and Astrophysics

Astrophysics

ApJ Letters, accepted

Scientific paper

10.1086/423669

We present a deep XMM-Newton observation of the z=6.30 QSO SDSS J1030+0524, the second most distant quasar currently known. The data contain sufficient counts for spectral analysis, demonstrating the ability of XMM-Newton to measure X-ray spectral shapes of z~6 QSOs with integration times >100ks. The X-ray spectrum is well fit by a power law with index Gamma=2.12 +/- 0.11, an optical-X-ray spectral slope of a_{ox}=-1.80, and no absorption excess to the Galactic value, though our data are also consistent with a power law index in the range 2.02 < Gamma < 2.5 and excess absorption in the range 0 < N_H(cm^-2) < 8x10^22. There is also a possible detection (2 sigma) of FeKa emission. The X-ray properties of this QSO are, overall, similar to those of lower-redshift radio-quiet QSOs. This is consistent with the statement that the X-ray properties of radio-quiet QSOs show no evolution over 0

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