The variable broad emission line spectrum of 4C37.43

Details The variable broad emission line spectrum of 4C37.43 The variable broad emission line spectrum of 4C37.43

May 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.250..377o&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 250, May 15, 1991, p. 377-384. SERC-supported research.

Astronomy and Astrophysics

Astronomy

10

Emission Spectra, Line Spectra, Quasars, Stellar Spectra, Ultraviolet Spectra, Visible Spectrum, Iue, Light Curve, Lyman Alpha Radiation, Lyman Beta Radiation, Spectral Line Width, Spectrum Analysis

Scientific paper

A short, IUE-satellite observational campaign for the 4C37.43 quasar has yielded data which, in combination with archival data, show clear evidence for both UV continuum and Ly-alpha emission-line variability. An examination of both published and unpublished optical spectra shows that the H-beta line varied during the same period as Ly-alpha and C IV. The Ly-alpha, C IV, and O VI 1034 A line profiles are similar, and have stronger line wings relative to the core than the semiforbidden C III line. The line ratio in the wings is consistent with emission from a high column density region; the line core emission may emerge from a lower-density region than the wings.

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