Observing SNe Ia at z > 1 with the HST and at z 0.2 with the SDSS-II

Details Observing SNe Ia at z > 1 with the HST and at z 0.2 with the SDSS-II Observing SNe Ia at z > 1 with the HST and at z 0.2 with the SDSS-II

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007hia....14..314l&link_type=abstract

Highlights of Astronomy, Volume 14, p. 314-315

Mathematics

Logic

Cosmological Parameters, Cosmology: Observations, Supernovae: General

Scientific paper

SNe Ia are currently providing the most direct measurements of the accelerated expansion of the Universe and also put constraints on the nature and evolution of the so-called ‘dark energy’. Despite major efforts to increase the number of known high-redshift SNe 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 Hubble Space Telescope and its superior angular resolution to get meaningful distance estimates, while at intermediate redshifts (z 0.2) the large solid angle necessary presents an obstacle to most surveys that can be overcome with the Sloan Digital Sky Survey, SDSS-II.

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