The systemic redshift of the quasar 1331 + 170
Item Type:Journal Article
Citation:Carswell, R. F. and Mountain, C. M. and Robertson, D. J. and Beard, S. M. and Glendinning, A. R. and Laird, D. C. and Lawrence, L. C. and Montgomery, D. and Pentland, G. and Pickup, D. A et al., 'The systemic redshift of the quasar 1331 + 170' in Astrophysical Journal, Part 2 - Letters, 381, (1), 1991, pp. L5-L8.
nph-iarticle_query.pdf (publisher pdf) 1.532Mb
Infrared spectra covering the 1.6- and 2-micron regions of the quasar 1331 + 170, redshift z = 2.09, were obtained with the CGS4 spectrometer at the UK Infrared Telescope. These spectra show redshifted H-alpha, H-beta, and (O-III) lines. The redshifts of the forbidden lines are similar to the low-ionization lines measured at optical wavelengths but are significantly higher than the high-ionization-line redshift. Thus, the low-ionization lines are likely to provide a reliable estimate for the systematic redshift in this object, and the high-ionization material is therefore flowing out from, or into, the quasar and is subject to some obscuration.
Author: ESPEY, BRIAN RUSSELL
Publisher:American Astronomical Society
Type of material:Journal Article
Availability:Full text available