A survey of Radio Recombination Lines using Ooty Radio Telescope at 328 MHz in the Inner Galaxy

Abstract

A survey of radio recombination lines in the Galactic plane with longitude $-32^o<l<+80^o$ and latitude $b<\pm 3^o$ using Ooty Radio Telescope(ORT) at 328 MHz has been reported. ORT observations were made using a New Digital Backend(NDB) augmented to it recently. With NDB ORT had a beam of $2^o.3\times 2^o.2sec(\delta )$ and a passband of $\sim$1 MHz in the spectral line mode. The above mentioned Galactic region was divided into $\sim 2^o\times 2^o$ patches with the ORT beam pointed to the center. The ORT observations form a study of distribution of extended low-density warm-ionized medium(ELDWIM) in the inner Galaxy using H271$\alpha$ RL. By obtaining kinematical distances using $V_{LSR}$ of the H271$\alpha$ RLs the distribution of ELDWIM clouds within the inner Galaxy has been deduced for the region given above.

28 pages, Published in The Astronomical Journal with minor differences

References in corpus (1)

• Helium line detections from ELDWIM at 1.4 GHz

Cited by in corpus (2)

• The GBT Diffuse Ionized Gas Survey (GDIGS): Survey Overview and First Data Release
• SIGGMA: A Survey of Ionized Gas in the Galaxy, Made with the Arecibo Telescope