Title :
Zero-spacing interferometer for measurement of continuum spectrum of the low radio frequency background
Author :
Raghunathan, A. ; Patra, Nipanjana ; Shankar, N. Udaya ; Ekers, R.D. ; Subrahmanyan, Ravi
Author_Institution :
Raman Res. Inst., Bangalore, India
Abstract :
We have developed an interferometer method for measurement of broad-band spectrum of the low radio frequency celestial radiation background, which is of importance in understanding the Epoch of Reionization, when the first stars and galaxies formed in the evolving universe. We have used two antennas in a short-spacing east-west interferometer mode, with a resistive semi-transparent screen in between. The system operates in the frequency range 87.5 to 175 MHz, suitable for probing the evolution in the state of the gas during cosmological epochs in the redshift range 7-15.
Keywords :
astronomical techniques; cosmology; galaxies; red shift; Epoch-of-Reionization; broad-band spectrum; continuum spectrum; cosmological epochs; frequency 87.5 MHz to 175 MHz; galaxies; interferometer method; low radio frequency celestial radiation background; redshift 7 to 15; resistive semitransparent screen; short-spacing east-west interferometer mode; universe; zero-spacing interferometer; Antennas; Band pass filters; Broadband communication; Noise; Radio interferometry; Receivers; Switches;
Conference_Titel :
General Assembly and Scientific Symposium, 2011 XXXth URSI
Conference_Location :
Istanbul
Print_ISBN :
978-1-4244-5117-3
DOI :
10.1109/URSIGASS.2011.6051278
