The Hubble diagram for QSOs

Details The Hubble diagram for QSOs The Hubble diagram for QSOs

Jul 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978mnras.184p..21n&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 184, July 1978, p. 21P-25P.

Astronomy and Astrophysics

Astronomy

4

Hubble Diagram, Quasars, Stellar Spectrophotometry, Continuous Spectra, Red Shift, Stellar Spectra

Scientific paper

The Hubble diagram of 76 QSOs divided into subgroups according to the spectral index of their optical continua is examined. A strong correlation is found for objects with a flat continuum, and no correlation at all for the ones with a steep continuum. The latter seem to be the main cause for the large scatter in the Hubble diagram of QSOs. Objects with spectral indices of less than 1.2 have an improved Hubble relation which is consistent with a nonevolutionary cosmology characterized by a deceleration parameter equal to unity.

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