Physics
Scientific paper
Oct 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009atnf.prop.2583a&link_type=abstract
ATNF proposal C2118, Semester: October, 2009
Physics
Interstellar Medium In And Around The Milky Way, Atca
Scientific paper
This proposal seeks to utilize CABB mode CFB 64M?32k A bandwidth of 2 GHz with 32 x 64-MHz channel + a fine resolution of 32 kHz. Utilizing ATCA's recent CABB upgrade, we propose to evaluate a novel software frequency-switching technique for measuring extremely weak spectral-lines, e.g. radio lines of molecules, high-order RRLs of hydrogen, helium and carbon, etc. As a test of this technique, we propose to put to rest a decade-old mystery initiated by the observation of the highest transition-order lines of hydrogen ever published (Bell et al. 2000). Specifically, we will test, for the first time, puzzling findings that suggest HI line-widths decrease, while line-areas increase above predicted values for n > 180, delta-n > 6 by observing RRLs in the Orion nebula and NGC 3603 at 6GHz. It is expected that these observations, with the application of our novel technique, will lead to a deeper understanding of the quantum nature of matter, particularly at low densities and high principle quantum numbers.
Alexander Jordan
Gulyaev Sergei
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