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Absorption spectrum of the z=3.78 QSO 2000-330 at high resolution

Published online by Cambridge University Press:  19 July 2016

R.W. Hunstead ,
H.S. Murdoch ,
J.C. Blades  and
M. Pettini
R.W. Hunstead
Affiliation:
School of Physics, University of Sydney, Australia
H.S. Murdoch
Affiliation:
School of Physics, University of Sydney, Australia
J.C. Blades
Affiliation:
Space Telescope Science Institute, Baltimore, U.S.A.
M. Pettini
Affiliation:
Royal Greenwich Observatory, Hailsham, U.K.

Extract

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The forest of absorption lines observed in all high-redshift QSOs at wavelengths shorter than Ly α emission is generally accepted as being due to a population of intergalactic hydrogen clouds. In order to study the physical properties of these clouds and possible changes in the properties with redshift it is first necessary to establish the true continuum level. The difficulty in defining continuum levels in the Ly α forest region is readily acknowledged in the literature but only rarely do published spectra show the adopted continuum.

Type
VI. Quasars as Probes of the Intervening Medium
Information
Symposium - International Astronomical Union , Volume 119: Quasars , 1986 , pp. 569 - 570
Copyright
Copyright © Reidel 1986 

References

Hunstead, R.W., Murdoch, H.S., Peterson, B.A., Blades, J.C., Jauncey, D.L., Wright, A.E., Pettini, M. & Savage, A., 1986. Ap. J. (in press) Google Scholar