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Cosmic microwave background anisotropies from outflows in Lyman break galaxies

Babich, Daniel and Loeb, Abraham (2007) Cosmic microwave background anisotropies from outflows in Lyman break galaxies. Monthly Notices of the Royal Astronomical Society, 374 (1). L24-L28. ISSN 0035-8711. doi:10.1111/j.1745-3933.2006.00257.x.

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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 ~1 μK, comparable to the level produced during the epoch of reionization.

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Loeb, Abraham0000-0003-4330-287X
Additional Information:© 2006 The Authors. Journal compilation © 2006 RAS. Accepted 2006 October 13. Received 2006 October 11; in original form 2006 September 18. This work was supported in part by Harvard university grants. DB thanks the Harvard Institute for Theory and Computation for its hospitality when this work was completed, and acknowledges helpful conversations with Re’em Sari and Niayesh Afshordi.We also thank Matt McQuinn for making available the numerical results from his work.
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Harvard UniversityUNSPECIFIED
Subject Keywords:galaxies : high-redshift; cosmic microwave background
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Record Number:CaltechAUTHORS:20091016-102416247
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:16360
Deposited By: Tony Diaz
Deposited On:26 Oct 2009 19:35
Last Modified:08 Nov 2021 23:26

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