CMB Anisotropies from Outflows in Lyman Break Galaxies

Details CMB Anisotropies from Outflows in Lyman Break Galaxies CMB Anisotropies from Outflows in Lyman Break Galaxies

2006-09-14

arxiv.org/abs/astro-ph/0609399v1

Mon.Not.Roy.Astron.Soc.Lett. 374 (2007) L24-L28

Astronomy and Astrophysics

Astrophysics

5 pages, 2 figures; to be submitted to MNRAS

Scientific paper

10.1111/j.1745-3933.2006.00257.x

Thomson scattering of the Cosmic Microwave Background (CMB) on moving electrons in the outflows of Lyman Break Galaxies (LBGs) at redshifts 2-8 contributes to the small-scale CMB anisotropies. The net effect produced by each outflow depends on its level of deviation from spherical symmetry, caused either by an anisotropic energy injection from the nuclear starburst or quasar activity, or by an inhomogeneous intergalactic environment. We find that for plausible outflow parameters consistent with spectroscopic observations of LBGs, the induced CMB anisotropies on arcminute scales reach up to $\sim 1 \mu$K, comparable to the level produced during the epoch of reionization.

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