The Formation and Fragmentation of Disks around Primordial Protostars

Details The Formation and Fragmentation of Disks around Primordial Protostars The Formation and Fragmentation of Disks around Primordial Protostars

2011-01-27

arxiv.org/abs/1101.5284v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

This manuscript has been accepted for publication in Science. This version has not undergone final editing. Please refer to th

Scientific paper

The very first stars to form in the Universe heralded an end to the cosmic dark ages and introduced new physical processes that shaped early cosmic evolution. Until now, it was thought that these stars lived short, solitary lives, with only one extremely massive star, or possibly a very wide binary system, forming in each dark matter minihalo. Here we describe numerical simulations that show that these stars were, to the contrary, often members of tight multiple systems. Our results show that the disks that formed around the first young stars were unstable to gravitational fragmentation, possibly producing small binary and higher-order systems that had separations as small as the distance between the Earth and the Sun.

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