Mathematics – Logic
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...208.4917m&link_type=abstract
American Astronomical Society Meeting 208, #49.17; Bulletin of the American Astronomical Society, Vol. 38, p.127
Mathematics
Logic
Scientific paper
Using the DRAO synthesis telescope (1’ resolution) and the GBT (9’ resolution) we have been probing into the relatively unexplored territory of H I in very faint cirrus, in two 25 square degree regions that we dub the DRAO Planck Deep Fields (DPDF). We anticipate an impact in two complementary areas. First, there is the study of the properties of the diffuse cirrus, interesting laboratories for understanding physical processes in the interstellar medium. These regions have both local gas and intermediate velocity (IVC) gas components, and thus complex dynamics. Second, dust usually is present along with the gas, and the dust emission is one of the pesky foregrounds with which both CMB and CIRB studies have to contend. This is challenging when there is more than “normal” cirrus to deal with; here there are IVC and also HVC components, often a prominent fraction of the total H I along these low column density lines of sight. It seems naive to imagine that the dust emission associated with each of these components would be the same, either in emission per unit gas column density or in spectral shape. Using velocity-dependent morphological information we are attempting to examine separately the otherwise superimposed dust emission from the various components.This research is supported by the Natural Sciences and Engineering Research Council of Canada. The DRAO is part of the Herzberg Institute, National Research Council, Canada. The NRAO is operated by Associated Universities, Inc., under a cooperative agreement with the NSF.
DPDF Collaboration
Lockman Felix J.
Martin Peter G.
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