Near-Infrared Broad-Line Profiles In Low-Redshift QSOs

Date

1992-08

Authors

Thompson, Keith L.

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Abstract

We present near-infrared and optical spectrophotometry of six low-redshift QSOs. The integrated Pa-alpha/H-alpha-ratios cluster near the value 0.1, with one exception having a larger ratio consistent with other evidence of reddening. At least two of the Pa-alpha/H-alpha-profile ratios decrease with observed velocity. We discuss some implications for the dynamics of the broad-line region and this ratio's usefulness as a reddening indicator. We also present a spectrum of the He I-lambda-10830, Pa-lambda-blend of 1226 + 023. The He I/H-alpha-profile ratio shows marginal evidence for decreasing with observed velocity, which is consistent with the interpretation for the Pa-alpha/H-alpha-profile ratios.

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Citation

Thompson, Keith L. "Near-infrared broad-line profiles in low-redshift QSOs." The Astrophysical Journal, Vol. 395 (Aug., 1992): 403-417.