A Composite Extreme Ultraviolet QSO Spectrum from FUSE

Details A Composite Extreme Ultraviolet QSO Spectrum from FUSE A Composite Extreme Ultraviolet QSO Spectrum from FUSE

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...202.4202s&link_type=abstract

American Astronomical Society Meeting 202, #42.02; Bulletin of the American Astronomical Society, Vol. 35, p.759

Astronomy and Astrophysics

Astronomy

Scientific paper

The Far Ultraviolet Spectroscopic Explorer (FUSE) has surveyed a large sample ( > 100) of active galactic nuclei in the low redshift universe (z < 1). Its response at short wavelengths, down to the Galactic Lyman limit at 912 Å, makes it possible to directly measure the EUV spectral shape of QSOs and Seyfert 1 galaxies at z < 0.3, as well as their intrinsic fluxes at the Lyman limit. Using archival FUSE spectra, we form a composite EUV spectrum of QSOs at z < 1 and compare it to UV/optical composite spectra of QSOs at higher redshift from archival Hubble Space Telescope spectra, and from ground-based data from the First Bright Quasar Survey and the Sloan Digital Sky Survey to establish how QSO continuum and emission line characteristics may have evolved with time.

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