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Title: A high galactic latitude HI 21cm-line absorption survey using the GMRT: I. observations and spectra
Authors: Mohan, Rekhesh
Dwarakanath, K.S.
Srinivasan, G.
Keywords: ISM:clouds
kinematics and dynamics
Radio lines: ISM
Issue Date: 2004
Publisher: Indian Academy of Sciences, Bangalore, India.
Citation: Journal of Astrophysics and Astronomy, 2004, Vol. 25, p143-183.
Abstract: We have used the Giant Meterwave Radio Telescope (GMRT) to measure the Galactic HI 21-cm line absorption towards 102 extragalactic radio continuum sources, located at high (|b| > 15?) Galactic latitudes. The Declination coverage of the present survey is δ - 45?.With a mean rms optical depth of ? 0.003, this is the most sensitive Galactic HI 21- cm line absorption survey to date. To supplement the absorption data, we have extracted the HI 21-cm line emission profiles towards these 102 lines of sight from the Leiden Dwingeloo Survey of Galactic neutral hydrogen. We have carried out a Gaussian fitting analysis to identify the discrete absorption and emission components in these profiles. In this paper, we present the spectra and the components. A subsequent paper will discuss the interpretation of these results.
ISSN: 0250-6335
Copyright: Indian Academy of Sciences, Bangalore, India.
Appears in Collections:Research Papers (A&A)

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