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

Chongchitnan, Sirichai; Chongchitnan, Siri


Sirichai Chongchitnan

Siri Chongchitnan


© 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.


Chongchitnan, S. (2014). The Lyman α forest as a tool for disentangling non-Gaussianities. Journal of cosmology and astroparticle physics, 2014(10),

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
Keywords Lyman α forest
Public URL
Publisher URL
Copyright Statement ©2016 University of Hull
Additional Information This is the authors accepted manuscript of an article published in Journal of cosmology and astroparticle physics, 2014, v.2014.


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