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1978•Monthly Notices of the Royal Astronomical SocietyOpen access

The Hubble diagram for QSOs

H. Netzer, A. Yahil, Roy Yaniv

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Abstract

We look at the Hubble diagram of 76 QSOs which we divide into subgroups according to the spectral index of their optical continua. We find a strong correlation 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 |$\alpha \lt 1.2$| have an improved Hubble relation which is consistent with a non-evolutionary |$q_0 = 1$| cosmology.

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We look at the Hubble diagram of 76 QSOs which we divide into subgroups according to the spectral index of their optical continua. We find a strong correlation 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 |$\alpha \lt 1.2$| have an improved Hubble relation which is consistent with a non-evolutionary |$q_0 = 1$| cosmology.

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Available abstract

We look at the Hubble diagram of 76 QSOs which we divide into subgroups according to the spectral index of their optical continua. We find a strong correlation 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 |$\alpha \lt 1.2$| have an improved Hubble relation which is consistent with a non-evolutionary |$q_0 = 1$| cosmology.

Key concepts: QSOS, Physics, Astrophysics, Hubble's law, Diagram, Cosmology, Hubble volume, Red shift

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