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By R. W. Goodrich, R. Campbell, F. H. Chaffee, G. M. Hill, D. Sprayberry, D. P. Schneider, S. Kaspi, X. Fan, J. E. Gunn and M. A. Strauss

Abstract

We use the NIRSPEC near-IR spectrometer on Keck II to obtain moderate resolution (R = 1540) spectroscopy that shows conclusively that the C IV emission line in the z = 5.74 quasar SDSSp J104433.04–012502.2 is accompanied by broad, blueshifted C IV absorption. The line has a “balnicity index ” of 900 km s –1 and a rest-frame equivalent width of 13.1 ± 1.3 Å relative to the continuum. This confirms its membership in the class of objects called “broad-absorption line ” (BAL) QSOs. SDSSP J1044–0125 was previously suggested to be a BAL QSO based on its larger UV-to-X-ray flux ratio than most non-BAL QSOs. The C IV emission is of normal strength, implying a metallicity similar to that found in other, lower-redshift QSOs

Year: 2001
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