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http://hdl.handle.net/2248/2721
Title: | Upper Limits on O VI Emission from Voyager Observations |
Authors: | Murthy, M |
Keywords: | Galaxy: Halo ISM: general |
Issue Date: | Jun-2002 |
Publisher: | Indian Academy of Sciences |
Citation: | Journal of Astrophysics and Astronomy, Vol. 23, No. 1-2, pp. 23 – 26 |
Abstract: | We have examined 426 Voyager fields distributed across the sky for O VI (1032/1038 Å) emission from the Galactic diffuse interstellar medium. No such emission was detected in any of our observed fields. Our most constraining limit was a 90% confidence upper limit of 2600 photons cm-2 sr-1 s-1 on the doublet emission in the direction (l, b) = (117.3, 50.6). Combining this with an absorption line measurement in nearly the same direction allows us to place an upper limit of 0.01 cm-3 on the electron density of the hot gas in this direction. We have placed 90% confidence upper limits of less than or equal to 10,000 photons cm-2 sr-1 s-1 on the O VI emission in 16 of our 426 observations. |
URI: | http://hdl.handle.net/2248/2721 |
ISSN: | 0250-6335 |
Appears in Collections: | IIAP Publications |
Files in This Item:
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Murthy J.pdf | 28.95 kB | Adobe PDF | View/Open |
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