Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...377l...1b&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 377, Aug. 10, 1991, p. L1-L4.
Astronomy and Astrophysics
Astrophysics
27
Faint Objects, Hubble Space Telescope, Quasars, Spectrographs, Ultraviolet Spectroscopy, Far Ultraviolet Radiation, Helium, Line Spectra
Scientific paper
To investigate the far-UV spectral properties of a QSO and to look for evidence of He I 584 A emission and absorption the Faint Object Spectrograph aboard the HST was used to observed UM 675. Light is detected down to 520 A in the object in the rest frame and limits are set to He I emission, the He I Gunn-Peterson effect at z = 2.148, and Ly-alpha absorption at z roughly 0.5.
Beaver Edward A.
Burbidge Margaret. E.
Cohen Ross D.
Davidsen Arthur F.
Hartig George F.
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