RRI Banner

Observing Nulling of Primordial Correlations via the 21-cm Signal

Simple item page
dc.contributor.authorBalaji, Shyam
dc.contributor.authorRagavendra, H V
dc.contributor.authorSethi, Shiv
dc.contributor.authorSilk, Joseph
dc.contributor.authorSriramkumar, L
dc.date.accessioned2023-01-24T05:18:58Z
dc.date.available2023-01-24T05:18:58Z
dc.date.issued2022-12-22
dc.descriptionRestricted Access. An open-access version is available at arXiv.org (one of the alternative locations)en_US
dc.description.abstractThe 21-cm line emitted by neutral hydrogen (HI) during the Dark Ages carries imprints of pristine primordial correlations. In models of inflation driven by a single, canonical scalar field, we show that a phase of ultra-slow-roll can lead to a null in all the primordial correlations at a specific wave number kdip. We consider scenarios wherein the null in the correlations occurs over wave numbers 1≲kdip≲10  Mpc−1, and examine the prospects of detecting such a damping in the HI signal due to the nulls at the level of power and bispectra in future observational missions.en_US
dc.identifier.citationPhysical Review Letters, 2022, Vol. 129, p261301en_US
dc.identifier.issn0031-9007
dc.identifier.issn1079-7114 (Online)
dc.identifier.urihttp://hdl.handle.net/2289/8028
dc.language.isoenen_US
dc.publisherAmerican Physical Societyen_US
dc.relation.urihttps://ui.adsabs.harvard.edu/abs/2022PhRvL.129z1301B/abstracten_US
dc.relation.urihttps://arxiv.org/abs/2206.06386en_US
dc.relation.urihttps://doi.org/10.1103/PhysRevLett.129.261301en_US
dc.relation.urihttps://inspirehep.net/literature/2095914en_US
dc.rights2022 American Physical Societyen_US
dc.subjectgravitationen_US
dc.subjectcosmologyen_US
dc.subjectastrophysicsen_US
dc.subjectradioen_US
dc.subjectmicrowaveen_US
dc.subjectinflationen_US
dc.subjectevolution of the universeen_US
dc.titleObserving Nulling of Primordial Correlations via the 21-cm Signalen_US
dc.typeArticleen_US

Files

Collections

Research Papers (A&A)