Um cálculo maior da entropia do universo

A Larger Estimate of the Entropy of the Universe

Chas A. Egan, Charles H. Lineweaver
(Submitted on 22 Sep 2009)

Using recent measurements of the supermassive black hole mass function we find that supermassive black holes are the largest contributor to the entropy of the observable Universe, contributing at least an order of magnitude more entropy than previously estimated. The total entropy of the observable Universe is correspondingly higher, and is $S_{obs} = 3.1^{+3.0}_{-1.7}\xt{104} k$. We calculate the entropy of the current cosmic event horizon to be $S_{CEH} = 2.6 \pm 0.3 \xt{122} k$, dwarfing the entropy of its interior, $S_{CEH int} = 1.2^{+1.1}_{-0.7}\xt{103} k$. We make the first tentative estimate of the entropy of dark matter within the observable Universe, $S_{dm} = 10^{88\pm1} k$. We highlight several caveats pertaining to these estimates and make recommendations for future work.

Comments: ApJ Submitted

Subjects: Cosmology and Extragalactic Astrophysics (astro-ph.CO)

Cite as: arXiv:0909.3983v1 [astro-ph.CO]

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