Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-05-13
Astrophys.J. 576 (2002) 75-80
Astronomy and Astrophysics
Astrophysics
18 pages, including 6 postscript figures, accepted for publication on ApJ
Scientific paper
10.1086/341546
Using the theoretical models of the QSO formation, we can reproduce optical QSO luminosity functions (LFs) at high redshifts (z > 2.2). Two different models can reproduce LFs successfully, though the lifetime of QSOs, t_Q, and the relation between the black hole mass and the host halo mass are different each other; t_Q = 10^6yr, in one model, t_Q > 10^7yr, in other models. Here, we propose a method to break this degeneracy. We calculate the mass function of supermassive black holes (SMBHs) at z=2.5, and compare the result with the current mass function obtained by Salucci et al.(1999). In the shorter lifetime model, the mass function at z=2.5 exceeds that of z=0.0 by one order of magnitude, then it should be ruled out. We conclude that the lifetime is at least t_Q > 10^7yr. Next, we examine the difference of the formation epoch of SMBHs existing at z=3.0 for each model under the model assumptions. We simply discuss the difference of formation epoch as another possible model-discriminator.
No associations
LandOfFree
Constraining the Lifetime of QSOs with Present-day Mass Function of Supermassive Black Holes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Constraining the Lifetime of QSOs with Present-day Mass Function of Supermassive Black Holes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constraining the Lifetime of QSOs with Present-day Mass Function of Supermassive Black Holes will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-422378