Constraining the Hubble Constant with a Type II Supernova

Details Constraining the Hubble Constant with a Type II Supernova Constraining the Hubble Constant with a Type II Supernova

Feb 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007noao.prop..389m&link_type=abstract

NOAO Proposal ID #2007A-0389

Mathematics

Logic

Scientific paper

We propose to obtain multi-epoch photospheric-phase high signal-to- noise ratio optical spectroscopic observations of a Type II supernova in the Hubble flow (cz ~ 6000-10,000 km/s). These observations will enable us to measure the Hubble Constant, H_0, to ~10%, independent of the distance to the Large Magellanic Cloud. Precision measurements of cosmological parameters (e.g., via the CMB power spectrum) are currently limited by the precision of H_0. Moreover, the modeling of such rare high-quality data will enable us to constrain the properties of the progenitor massive star, i.e., its structure and composition, as well as develop a better understanding of the explosion mechanism at the origin of the event.

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