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 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009noao.prop..265m&link_type=abstract

NOAO Proposal ID #2009A-0265

Mathematics

Logic

Scientific paper

We plan to determine the Hubble constant (H_0) to ≲10% by directly inferring distances to a sample of Type II-P supernovae (SNe) in the Hubble flow (cz ~ 9000 km/s), independent of any of the lower rungs on the distance ladder. Measurements of cosmological parameters are currently limited by the precision of H_0. Continuing our program, we propose to obtain multi- epoch photospheric-phase high signal-to-noise ratio optical spectroscopic observations with GMOS. We will perform a detailed quantitative spectroscopic non-LTE model atmosphere analysis, and infer the SN distance with a ≲10% accuracy. In two recent papers (Dessart & Hillier 2006; Dessart et al. 2008), we find excellent agreement between direct distance measurements to three nearby Type II-P SNe and other distance estimates (Cepheid, SBF). Ultimately, to reduce the statistical uncertainty in the inferred H_0 value, we plan to collect distances for three more SNe over as many semesters, along with a comparable number obtained at the VLT.

Affiliated with

Also associated with

No associations

Rating

Constraining the Hubble Constant with a Type II Supernova does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Constraining the Hubble Constant with a Type II Supernova, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constraining the Hubble Constant with a Type II Supernova will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1244766