Connection of QSOS with Local Massive Black Holes

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

The existence of massive black holes (BHs) in many or most nearby galactic centers, predicted by some arguments on QSO energetics and demography, has been confirmed. In this paper we present several expected quantitative relations between QSOs and local BHs. Comparison of these relations with observations may provide constraints on BH growth and QSO models. We especially show that the luminosity evolution of individual QSOs can be constrained by comparing the time integral of the QSO luminosity function with the expectation from local BHs. We also further show how to predict the BH mass versus velocity dispersion relation in QSOs/AGNs. Possible directions of future work are discussed.

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