Effect of the Lyman-alpha forest on the ultraviolet continua of very high redshift quasars
Moderate resolution spectra are reported for eight high-redshift quasars (z over 2.7) observed with the Hale 5.08 m telescope. Newly-determined redshifts and apparent continuum visual magnitudes are tabulated for the objects Q0014 + 8118, Q0308 + 1902, Q0731 + 6519, Q0805 + 0441, Q0903 + 1734, Q0941 + 2606, Q0956 + 1217 and Q1358 + 1134 over the observed wavelength range 3200-10,000 A. It is shown that low resolution spectra, such as obtained with the IUE, can yield continuum levels significantly below those detected at very high resolution due to line and continuum absorption by neutral hydrogen along the line of sight to the quasar being studied. Estimates are made of the fractional flux decrement below Lyman-alpha and above Lyman-beta emission due to the intervening material. 38 references.
- Research Organization:
- Palomar Observatory, Pasadena, CA
- OSTI ID:
- 6349374
- Journal Information:
- Astrophys. J.; (United States), Vol. 313
- Country of Publication:
- United States
- Language:
- English
Similar Records
Redshift evolution of the Lyman-line-absorbing clouds in quasar spectra
Reionization history constraints from neural network based predictions of high-redshift quasar continua