Physics – High Energy Physics
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...199.6408w&link_type=abstract
American Astronomical Society, 199th AAS Meeting, #64.08; Bulletin of the American Astronomical Society, Vol. 33, p.1406
Physics
High Energy Physics
Scientific paper
The Nearby Supernova Factory (SNfactory) is an international collaboration designed to lay the foundation for the next generation of cosmology experiments (such as SNAP) which will measure the expansion history of the Universe using Type Ia supernovae (SNe Ia). The SNfactory will discover and obtain frequent lightcurve spectrophotometry covering λ λ 350--1000 nm for ~ 300 Type Ia supernovae at the low-redshift end of the smooth Hubble flow. The SNfactory search capabilities and follow-up instrumentation are described; they include wide-field CCD imagers on two 1.2-m telescopes (via collaboration with the Near Earth Asteroid Tracking team at JPL), and a two-channel integral-field-unit optical spectrograph on the University of Hawaii 2.2-m telescope on Mauna Kea. In addition to ground-based follow-up, HST is being used to obtain UV coverage for a subsample of the Type Ia supernovae. Due to the quantity, quality, breadth of environments, and homogeneous nature of the SNfactory dataset, it will serve as the premier source of calibration of the SN Ia width-brightness relation and the intrinsic SN Ia colors used for K-correction and correction for extinction by host-galaxy dust. This dataset will also allow an extensive investigation of additional parameters which possibly influence the quality of Type Ia supernovae as cosmological probes. The lowest redshift SNe Ia from the SNfactory can be used to measure galaxy peculiar velocities and thereby constrain Ω M. This work is funded in the United States by the Department of Energy Division of High Energy Physics, and in France by the Centre National de la Recherche Scientifique Institut National de Physique Nucléaire et de Physique des Particles and Institut National des Sciences de l'Univers.
Adam Gerhard
Aldering Greg
Antilogus Pierre
Astier Pierre
Bacon Roland
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