Bibcode
Decarli, R.; Falomo, R.; Treves, A.; Labita, M.; Kotilainen, J. K.; Scarpa, R.
Referencia bibliográfica
Monthly Notices of the Royal Astronomical Society, Volume 402, Issue 4, pp. 2453-2461.
Fecha de publicación:
3
2010
Número de citas
151
Número de citas referidas
143
Descripción
We study the dependence of the relation on the redshift up to z = 3 for
a sample of 96 quasars, the host galaxy luminosities of which are known.
Black hole masses were estimated assuming virial equilibrium in the
broad-line regions, while the host galaxy masses were inferred from
their luminosities. With these data, we are able to pin down the
redshift dependence of the relation along 85 per cent of the Universe
age. We show that, in the sampled redshift range, the relation remains
nearly unchanged. Once we take into account the ageing of the stellar
population, we find that the / ratio (Γ) increases by a factor of
~7 from z = 0 to z = 3. We show that Γ evolves with z regardless
of the radio loudness and of the quasar luminosity. We propose that the
most massive black holes, living their quasar phase at high redshift,
become extremely rare objects in host galaxies of similar mass in the
Local Universe.
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