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Title: Hydrogen recombination lines near 327 MHz - II: A galactic plane survey with a 2°x 6' beam
Authors: Roshi, Anish D.
Anantharamaiah, K.R.
Keywords: Galaxy,
General - H 11 regions - ISM;
Clouds - ISM;
General - ISM;
Issue Date: 2001
Publisher: Indian Academy of Sciences, Bangalore, India.
Citation: Journal of Astrophysics and Astronomy, 2001, Vol.22, p81-119.
Abstract: In a previous paper we presented a low-resolution (2 deg × 2 deg) survey of radio recombination lines (RRLs) at 327 MHz in the longitude range l = 330 deg to 0 deg to 89 deg. In this paper, we present the results of a higher resolution (2 deg × 6 arcmin) survey of RRLs from seven 2 deg-wide fields and two 6 deg-wide fields in the same longitude range. Observations were made using the Ooty Radio Telescope (ORT). A total of 252 spectra that were obtained are presented. RRLs were detected in almost all the individual positions within the fields with l < 35 deg and at several individual positions within the fields in the longitude range l = 35 deg to 85 deg. Detailed analysis of the data towards the field centered at G45.5+0.0, shows that the line emission consists of discrete zones of ionized gas. The angular extent of these zones are likely to be one degree or more corresponding to a linear size of > 110 pc at the kinematic distance.
ISSN: 0250-6335
Copyright: Indian Academy of Sciences, Bangalore, India.
Appears in Collections:Research Papers (A&A)

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