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Astron. Astrophys. 318, 673-679 (1997)

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Formation of MACHO-primordial black holes in inflationary cosmology

Jun'ichi Yokoyama

Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-01, Japan

Received 27 July 1995 / Accepted 15 June 1996


As a nonbaryonic explanation of massive compact halo objects, a phenomenological model is presented which predicts formation of primordial black holes at a desired mass scale. The required feature of initial density fluctuation is realized making use of primordially isocurvature fluctuations generated in an inflationary universe model with multiple scalar fields.

Key words: cosmology: theory – early universe – dark matter – Black hole physics

© European Southern Observatory (ESO) 1997

Online publication: July 3, 1998