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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/8292
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dc.contributor.authorSathish, Keerthipriya-
dc.contributor.authorRao, Mayuri Sathyanarayana-
dc.contributor.authorSarkar, Debdeep-
dc.date.accessioned2024-07-18T04:30:22Z-
dc.date.available2024-07-18T04:30:22Z-
dc.date.issued2024-06-28-
dc.identifier.citationThe Astrophysical Journal, 2024, Vol. 168, p39en_US
dc.identifier.urihttp://hdl.handle.net/2289/8292-
dc.descriptionOpen Accessen_US
dc.description.abstractThere exist inevitable deviations in the cosmic microwave background spectrum from that of a blackbody. The additive distortions from photons emitted over the epoch of recombination are one such deviation. We present a novel scalable broadband antenna design motivated by detecting these spectral distortions in the 2.5–4 GHz band. This antenna is capable of maintaining the spectral quality of the measured sky spectrum to 1 part in 10 3 over the full band and outperforms conventional broadband antennas by at least an order of magnitude. While this is not sufficient to make a direct detection of the cosmological recombination radiation, it meets the baseline design criteria for an experiment that can make an absolute measurement of the sky spectrum at the millikelvin level, thereby making it capable of improving foreground models to global signal detection experiments (including those from cosmic dawn and the epoch of reionization) and addressing the problem of the excess radio background at 3.3 GHz reported by the ARCADE2 experiment.en_US
dc.language.isoenen_US
dc.publisherIOP Publishing Ltd.en_US
dc.relation.urihttps://ui.adsabs.harvard.edu/abs/2024AJ....168...39S/abstracten_US
dc.relation.urihttps://inspirehep.net/literature/2803299en_US
dc.relation.urihttps://doi.org/10.3847/1538-3881/ad4a74en_US
dc.rights2024 The Author(s)en_US
dc.subjectRadio receiversen_US
dc.subjectRadio astronomyen_US
dc.subjectRadio telescopesen_US
dc.subjectGround telescopesen_US
dc.subjectGround-based astronomyen_US
dc.subjectCosmologyen_US
dc.subjectRecombination (cosmology)en_US
dc.subjectReionizationen_US
dc.titleAntenna Design for Absolute Sky Measurements at Gigahertz Frequencies—a First Step toward Detecting CMB Spectral Distortions from Recombinationen_US
dc.typeArticleen_US
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