Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/8426
Full metadata record
DC FieldValueLanguage
dc.contributor.authorKrishna, Dhashin-
dc.contributor.authorRao, Mayuri Sathyanarayana-
dc.date.accessioned2025-08-08T08:55:25Z-
dc.date.available2025-08-08T08:55:25Z-
dc.date.issued2025-08-04-
dc.identifier.citationJournal of Astrophysics and Astronomy, 2025, Vol. 46, p49en_US
dc.identifier.urihttp://hdl.handle.net/2289/8426-
dc.descriptionOpen Accessen_US
dc.description.abstractPhotons emitted during the formation of primordial hydrogen and helium atoms over the Epoch of Recombination are expected to be preserved as additive distortions to the Cosmic Microwave Background (CMB) spectrum. The ‘ripple’ like spectral features from Cosmological Recombination Radiation (CRR) have never been detected, and are expected to be 9 orders of magnitude fainter than the CMB. Array of Precision Spectrometers for the Epoch of Recombination (APSERa) is an upcoming ground-based experiment to detect the CRR signal over 2–6 GHz. While astrophysical foregrounds may be theoretically separated from the CRR signal using their inherently different spectral characteristics, instrument-generated systematics present a practical problem. We present the first-ever study to detect the CRR lines in the presence of a non-ideal antenna, adopting a toy model for antenna beam chromaticity. Using Euclidean distance and Pearson correlation coefficient as metrics to distinguish between CRR signal presence and absence in a simulation pipeline, we demonstrate that it is indeed possible to detect the signal using a chromatic antenna. Furthermore, we show that there are different tolerances to the antenna non-ideality based on the type of chromaticity, observing location, and LST. These can inform antenna and experiment design for a practical detection.en_US
dc.language.isoenen_US
dc.publisherSpringer for Indian Academy of Sciencesen_US
dc.relation.urihttps://ui.adsabs.harvard.edu/abs/2024arXiv241118945K/abstracten_US
dc.relation.urihttps://arxiv.org/abs/2411.18945en_US
dc.relation.urihttps://inspirehep.net/literature/2854237en_US
dc.relation.urihttps://doi.org/10.1007/s12036-025-10065-9en_US
dc.rights2025 Indian Academy of Sciencesen_US
dc.subjectCosmic microwave backgrounden_US
dc.subjectastronomical instrumentationen_US
dc.titleDetecting cosmological recombination lines with a non-ideal antenna: A first step to practical realizationen_US
dc.typeArticleen_US
Appears in Collections:Research Papers (A&A)

Files in This Item:
File Description SizeFormat 
2025_JAA_Vol.46_p49.pdfOpen Access2.42 MBAdobe PDFView/Open


Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.