Computer Science – Performance
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21333903g&link_type=abstract
American Astronomical Society, AAS Meeting #213, #339.03; Bulletin of the American Astronomical Society, Vol. 41, p.401
Computer Science
Performance
Scientific paper
Global cooling of ionized material soon after the Big Bang created a relatively uniform sea of atomic Hydrogen. Over the next billion years, gravity drove formation of large-scale baryonic and non-baryonic structure, self-luminous sources, and consequently pockets of reionization. The process of structure formation is critical to our understanding of the origin of the cosmos we see today however, direct knowledge of how or exactly when reionization proceeded is limited. A new generation of meter-wave interferometers with very wide fields of view (e.g., MWA, PAPER, and LOFAR) are targeting first detection of reionization and the spectrum of HI brightness fluctuations as a function of redshift, from which reionization can be characterized. We compare the technical strengths of these instruments, review recent results in early deployment operations, and discuss how, together, they are anticipated to provide constraints on the theory of reionization. These arrays involve very large data rates. They have been made practical only by recent advances in mass-scale digital signal processing and high performance computing. Knowledge gained in building this first generation of instruments is critically important both to guiding development of next generation of instruments as well as construction of the low-frequency segment of the Square Kilometer Array.
Backer Donald C.
Carilli Chris L.
Furlanetto Steven R.
Greenhill Lincoln J.
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