Quasars and gravitational lenses

Research output: Contribution to journalReview article

Abstract

Despite the expenditure of large amounts of telescope time and other resources, most of the fundamental questions concerning quasi-stellar objects (quasars) remain unanswered. A complex phenomenology of radio, infrared, optical, and x-ray properties has accumulated but has not yielded even a satisfactory classification system. The large red shifts (distances) of quasars make them very valuable tools for studying cosmology and the properties of intervening matter in the Universe through observations of absorption lines and gravitational lenses.

Original languageEnglish (US)
Pages (from-to)1255-1259
Number of pages5
JournalScience
Volume223
Issue number4642
DOIs
StatePublished - Jan 1 1984

All Science Journal Classification (ASJC) codes

  • General

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