Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...374l...9h&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 374, June 10, 1991, p. L9-L12. McDonald Observatory-supported res
Astronomy and Astrophysics
Astronomy
40
Emission Spectra, Infrared Sources (Astronomy), Luminosity, Paschen Series, Quasars, Seyfert Galaxies, Astronomical Spectroscopy, Broadband, Infrared Astronomy Satellite, Infrared Spectra, Spectral Energy Distribution
Scientific paper
The Paschen-alpha emission line in the extremely luminous IRAS-selected galaxies IRAS 20460 + 1925 and IRAS 23060 + 0505 is observed. The observed width of H-alpha of Pa-alpha in IRAS 20460 + 1925 is 3300 km/s, with a possible broader component of about 3860 km/s, while the observed width of H-alpha of Pa-alpha in IRAS 23060 + 0505 is 3270 km/s, with a possible broader component of about 4780 km/s. Considering these results as well as their bolometric luminosities, IRAS 20460 + 1925 and IRAS 23060 + 0505 are proposed to be classified as QSO's. It is suggested that there is a population of obscured QSO's, and that they can be selected by their warmth infrared energy distributions and QSO-like luminosities.
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