An Upper Limit on the Granularity of the Local Stellar Halo

Details An Upper Limit on the Granularity of the Local Stellar Halo An Upper Limit on the Granularity of the Local Stellar Halo

2003-04-15

arxiv.org/abs/astro-ph/0304267v1

Astrophys.J. 592 (2003) L63-L66

Astronomy and Astrophysics

Astrophysics

Submitted to ApJ Letters, 6 pages

Scientific paper

10.1086/377525

I use the statistical properties of 4588 nearby halo stars to show that if
the local stellar halo is composed of cold streams from disrupted dwarf
satellites as is predicted by popular cosmologies, then at 95% confidence there
are at least 1350 such streams. Moreover, no stream can contain more than 2.3%
of the local stars, while average streams must contain less than 0.08%.

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