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http://www.naic.edu/~gibson/thesis/abs.html.
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1. Galactic Spiral Structure in H I Emission and Self-Absorption
... AAS link ] . ... Our internal perspective makes it difficult to determine the spiral structure of our own galaxy. ... H I absorption, on the other hand, traces colder, denser gas that should be more confined in discrete clouds and perhaps discrete spiral arms. In addition, H I self-absorption (HISA) requires background H I emission at the same velocity as the foreground absorbing gas, thus introducing a much-needed constraint on the large-scale sightline geometry and kinematics. ...
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Ссылки http://www.naic.edu/~gibson/hisa/poster/2006b/ -- 3.6 Кб -- 19.05.2006
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2. http://www.naic.edu/~astro/Links.shtml
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Ссылки http://www.naic.edu/~astro/Links.shtml -- 1.2 Кб -- 01.10.2012
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3. http://www.naic.edu/~phil/mbeam/hipass.pdf
... 2.3 Data acquisition Spectra generated by the Multibeam correlator contain the usual structure seen in spectra from other H i instruments: a bandpass spectrum which is the sum of the sky , ground and receiver temperatures multiplied by the product of the filters in the receiver chain; superimposed on this is a noise ... Note also that sources extended much beyond ,40 arcmin can be imaged poorly in HIPASS images because of the bandpass sidelobe effect described in Section 3.3. ...
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Ссылки http://www.naic.edu/~phil/mbeam/hipass.pdf -- 370.1 Кб -- 14.03.2003
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