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Submillimeter Properties of the 1 M[CLC]s[/CLC] Chandra Deep Field–North X-Ray Sample

2001; IOP Publishing; Volume: 560; Issue: 1 Linguagem: Inglês

10.1086/324062

1538-4357

A. J. Barger, L. L. Cowie, A. T. Steffen, A. E. Hornschemeier, W. N. Brandt, G. P. Garmire,

Astrophysical Phenomena and Observations

We present submillimeter observations for 135 of the 370 X-ray sources detected in the 1 Ms exposure of the Chandra Deep Field-North. Nine of the X-ray sources are significantly detected in the submillimeter. The error-weighted mean 850 μm flux is significant at 1.21 ± 0.27 mJy. This value shows little dependence on the 2-8 keV flux from 5 × 10-16 to 10-14 ergs cm-2 s-1, but sources with brighter X-ray fluxes than this appear weak in the submillimeter. The ensemble of X-ray sources contribute about 15% of the extragalactic background light at 850 μm. The submillimeter excess is found to be strongest in the optically faint X-ray sources that are also seen at 20 cm, which is consistent with these X-ray sources being obscured and at high redshift (z > 1).