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| Paper: |
GASKAP – A Galactic Spectral Line Survey with the Australian Square Kilometer Array Pathfinder |
| Volume: |
438, The Dynamic Interstellar Medium: A Celebration of the Canadian Galactic Plane Survey |
| Page: |
428 |
| Authors: |
Dickey, J. M.; Gibson, S. J.; Gomez, J. F.; Imai, H.; Jones, P. A.; McClure-Griffiths, N. M.; Stanimirović, S.; van Loon, J. T. |
| Abstract: |
One of the Survey Science Projects that the Australian Square Kilometre Array Pathfinder (ASKAP) telescope will do in its
first few years of operation is a study of the λ21-cm line of HI and the λ18-cm lines of OH in the Galactic Plane and the
Magellanic Clouds and Stream. The wide-field ASKAP can survey a large area with very high sensitivity
much faster than a conventional telescope because of its focal plane array of receiver elements.
The brightness sensitivity for the widespread spectral line emission of the interstellar medium depends
on the beam size and the survey speed. In the GASKAP survey, maps with different resolutions will be synthesized
simultaneously; these will be matched to different scientific applications such as diffuse HI and OH emission, OH masers, and
HI absorption toward background continuum sources. A great many scientific questions will be answered by
the GASKAP survey results; a central topic is the exchange of matter and energy between the Milky Way disk
and halo. The survey will show how neutral gas at high altitude (z) above the disk, like the
Magellanic Stream, makes its way down through the halo, what changes it experiences along the way,
and how much is left behind. |
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