Near-infrared broad-line profiles in low-redshift QSOs

Details Near-infrared broad-line profiles in low-redshift QSOs Near-infrared broad-line profiles in low-redshift QSOs

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...395..403t&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 395, no. 2, Aug. 20, 1992, p. 403-417.

Astronomy and Astrophysics

Astronomy

8

Active Galactic Nuclei, Astronomical Spectroscopy, Infrared Astronomy, Line Spectra, Quasars, Data Reduction, H Alpha Line, Palladium, Photoionization, Red Shift

Scientific paper

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 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 lambda10830, Pa-gamma 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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