Observing SN Ia At z>1 With The HST And Around z=0.2 With The SDSS

Details Observing SN Ia At z>1 With The HST And Around z=0.2 With The SDSS Observing SN Ia At z>1 With The HST And Around z=0.2 With The SDSS

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd...9e..21l&link_type=abstract

Supernovae: One Millennium After SN1006, 26th meeting of the IAU, Joint Discussion 9, 17-18 August 2006, Prague, Czech Republic,

Physics

Scientific paper

SN Ia currently provide the most direct measurements of the accelerated expansion of the Universe and constraints on the nature and evolution of the so called 'dark energy'. Despite major efforts to increase the number of high-redshift SN Ia with reliable distance estimates two regions in the Hubble diagram remain only sparsely observed: At redshifts z>1 the limitations of ground based instruments require the HST (Hubble Space Telescope) to get meaningful distance estimates - while at intermediate redshifts (z ~ 0.2) the large solid angle necessary to be surveyed presents the main obstacle. The presentation will review past and on-going efforts to probe 'dark energy' with the HST at high redshifts by the Higher-Z Team. I will also discuss the current program to use the SDSS (Sloan Digital Sky Survey) to fill in the Hubble diagram at intermediate redshifts.

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