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http://hdl.handle.net/2289/2457
Title: | Ionized gas in the Sgr A complex -- VLA observations of H168α and H270α recombination lines |
Authors: | Anantharamaiah, K.R. Pedlar, A. Goss, W.M. |
Issue Date: | 1999 |
Publisher: | Astronomical Society of the Pacific |
Citation: | ASP Conference Series, 1999, Vol.186, p422 |
Abstract: | Radio recombination lines at λ = 20 cm reveal the presence of an extended component of ionized gas of lower density (~100 cm3) in the Sgr A complex. This component extends well beyond the thermal `mini-spiral' Sgr A-West which seem to be embedded in it. The low-density component is present over the entire extent of Sgr A East and possibly beyond and it is responsible for the turnover in the spectrum of Sgr A East and the halo observed by Pedlar et al (1989) at λ = 90 cm. The radial velocity of the extended ionized gas ranges from +50 kms- to --200 kms- with minima of emission near --50 and --150 kms. The total mass of the low-density component is estimated to be ~104 Modot. A possible extended feature at a high velocity of 470 kms- is also detected, but needs further observations to confirm it. |
Description: | Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations). |
URI: | http://hdl.handle.net/2289/2457 |
ISBN: | 1-58381-012-9 |
Alternative Location: | http://adsabs.harvard.edu/cgi-bin/bib_query?1999ASPC..186..422A http://arxiv.org/abs/astro-ph/9903072 |
Copyright: | The Central Parsecs of the Galaxy, ASP Conference Series, Vol. 186. Eds. Heino Falcke, Angela Cotera, Wolfgang J. Duschl, Fulvio Melia, and Marcia J. Rieke, 1999. |
Additional information: | 1999 Astronomical Society of the Pacific |
Appears in Collections: | Research Papers (A&A) |
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File | Description | Size | Format | |
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1999.ASP Conf. V186 p422.pdf Restricted Access | Restricted Access | 970.62 kB | Adobe PDF | View/Open Request a copy |
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