A Chandra observation of the z = 2 . 285 galaxy FSC 10214 + 4724 : Evidence for a Compton - thick quasar ?
نویسنده
چکیده
We present a ≈ 20 ks Chandra ACIS-S observation of the strongly lensed z = 2.285 ultra-luminous infrared galaxy FSC 10214+4724. Although this observation achieves the equivalent sensitivity of an up-to ≈ 4 Ms Chandra exposure (when corrected for gravitational lensing), the rest-frame 1.6–26.3 keV emission from FSC 10214+4724 is weak (LX ≈ 2×10 erg s for a lensing boost of ≈ 100); a significant fraction of this X-ray emission appears to be due to vigorous star-formation activity. If FSC 10214+4724 hosts a quasar, as previously suggested, then it must be obscured by Compton-thick material. We compare FSC 10214+4724 to high-redshift SCUBA galaxies and discuss the X-ray identification of Compton-thick AGNs at high redshift.
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