The Lyman α forest as a tool for disentangling non-Gaussianities

Chongchitnan, Siri

Abstract

© 2014 IOP Publishing Ltd and Sissa Medialab srl . Detection of primordial non-Gaussianity will give us an unprecedented detail of the physics of inflation. As observational probes are now exploring new expanses of the inflationary landscape, it is crucial to distinguish and disentangle effects of various non-Gaussianities beyond f NL . In this work, we calculate the effects of non-Gaussianities parametrized by f NL and the cubic-order g NL , on the Lyman α-forest flux measurements. We give the expressions of the bias due to f NL and g NL , which can be deduced from accurate measurements of the transmitted flux. We show how these two effects can be cleanly disentangled via a flux transformation, which also keeps the error in check.

Citation

Chongchitnan, S. (2014). The Lyman α forest as a tool for disentangling non-Gaussianities. Journal of cosmology and astroparticle physics, 2014(10), Article ARTN 034. https://doi.org/10.1088/1475-7516/2014/10/034

• Journal Article Type: Article
• Acceptance Date: Sep 28, 2014
• Online Publication Date: Oct 15, 2014
• Publication Date: 2014-09
• Deposit Date: Apr 11, 2016
• Publicly Available Date: Apr 11, 2016
• Journal: Journal of cosmology and astroparticle physics
• Electronic ISSN: 1475-7516
• Publisher: IOP Publishing
• Peer Reviewed: Peer Reviewed
• Volume: 2014
• Issue: 10
• Article Number: ARTN 034
• DOI: https://doi.org/10.1088/1475-7516/2014/10/034
• Keywords: Lyman α forest
• Public URL: https://hull-repository.worktribe.com/output/435678
• Publisher URL: http://iopscience.iop.org/article/10.1088/1475-7516/2014/10/034/meta
• Additional Information: This is the authors accepted manuscript of an article published in Journal of cosmology and astroparticle physics, 2014, v.2014.
• Contract Date: Apr 11, 2016