Cosmological Entropy and Black Holes in Galactic Halos

Abstract

In this talk we discuss intermediate mass black holes (IMBHs) by their amplilification of distant sources; MACHO searches have studied event times $2h\lesssim t_0\lesssim 2y$ corresponding masses in the range $10^{-6}{M}_{\odot }\lesssim M\lesssim 100M_{\odot }$. We suggest that larger masses up to $10^6{M}_{\odot }$ are also of considerable interest by arguments about the entropy of the universe. One percent by mass of dark energy can provide ninety-nine percent of total entropy.

7 pages latex. Talk at Dark Matter Conference, Galileo Galilei Institute Florence Italy, February 9-11, 2009

References in corpus (1)

• Upper and Lower Bounds on Gravitational Entropy

Cited by in corpus (1)

• Positron Excess, Luminous-Dark Matter Unification and Family Structure