The luminous quasar HS1700+6416 and the shape of the 'big bump' below 500 A

Details The luminous quasar HS1700+6416 and the shape of the 'big bump' below 500 A The luminous quasar HS1700+6416 and the shape of the 'big bump' below 500 A

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...218...71r&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 218, no. 1-2, July 1989, p. 71-77.

Astronomy and Astrophysics

Astrophysics

62

Accretion Disks, Intergalactic Media, Quasars, Astronomical Spectroscopy, Iue, Lyman Alpha Radiation, Radiant Flux Density, Ultraviolet Spectra

Scientific paper

Optical high-resolution and low-resolution spectrophotometry, together with IUE observations, shows HS1700+6416 to be the second most luminous quasar reported to date and to be the first quasar to be detected down to a rest wavelength of 330 A. The intrinsic quasar flux distribution per unit wavelength was found to unexpectedly rise sharply toward shorter wavelengths up to a rest wavelength of at least 330 A, suggesting that the turn-over of the 'big bump' in quasars and AGN may lie beyond about 3 Rydbergs. In addition to the usual Lyman alpha forest, a strong absorption system is noted at z = 2.43 which shows the presence of H Ly-alpha, Ly-beta, and C IV 1550-A lines, as well as a Lyman continuum edge.

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