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

fYear

2011

fDate

13-20 Aug. 2011

Firstpage

1

Lastpage

1

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;

fLanguage

English

Publisher

ieee

Conference_Titel

General Assembly and Scientific Symposium, 2011 XXXth URSI

Conference_Location

Istanbul

Print_ISBN

978-1-4244-5117-3

Type

conf

DOI

10.1109/URSIGASS.2011.6051278

Filename

6051278