Abstract Details
| Name: Mayuri Sathyanarayana Rao Affiliation: Raman Research Institute Conference ID: ASI2015_623 Title : On the detection of spectral ripples from the Epoch of Recombination Authors and Co-Authors : Ravi Subrahmanyan (Raman Research Institute), N Udayashankar (Raman Research Institute), Jens Chluba (The Johns Hopkins University) Abstract Type : Oral Abstract Category : General Relativity and Cosmology Abstract : Photons emitted during epoch of Hydrogen ( 500 < z < 2000 ) and Helium recombination ( 1600 < z <3500 for HeII → HeI and 5000 < z < 8000 for HeIII → HeII ) are predicted to appear as additive spectral distortions in the Cosmic Microwave Background. Detecting the cosmological hydrogen recombination lines would provide a better understanding of the thermal and ionisation history of the Universe and would provide an additional way to determine some of the key parameters of the Universe among others. In this talk we will present a feasibility study to experimentally detect these recombination lines of cosmological origin, the choice of frequency range, integration time for a ground based detection experiment and an algorithm for foreground subtraction. We will also talk about APSERa - Array of Precision Spectrometers for the Epoch of RecombinAtion, a venture to detect these recombination lines. |