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arXiv 0905.3657gr-qc
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Brans-Dicke理论与早期物质支配时代的原初黑洞

Brans-Dicke Theory and primordial black holes in Early Matter-Dominated Era

Bibekananda Nayak, Lambodar Prasad Singh

摘要:

我们证明了原初黑洞可以在Brans-Dicke理论所描述的物质主导的引力时代形成。考虑到在暴胀和再加热之间的早期物质主导时代,我们发现在那个时代形成的原始黑洞蒸发的速度比早期辐射主导时代更快。因此,与后一种情况相比,今天可能存在的原始黑洞数量较少。再次,对太初黑洞形成的约束往往比辐射主导时代的对应物更大,这表明在物质主导时代,太初黑洞的形成显着增强。

英文摘要:

We show that primordial black holes can be formed in the matter-dominated era with gravity described by the Brans-Dicke theory. Considering an early matter-dominated era between inflation and reheating, we found that the primordial black holes formed during that era evaporate at a quicker than those of early radiation-dominated era. Thus, in comparison with latter case, less number of primordial black holes could exist today. Again the constraints on primordial black hole formation tend towards the larger value than their radiation-dominated era counterparts indicating a significant enhancement in the formation of primordial black holes during the matter-dominaed era.

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