A Cosmological Discriminator Designed to Avoid Selection Bias

Details A Cosmological Discriminator Designed to Avoid Selection Bias A Cosmological Discriminator Designed to Avoid Selection Bias

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21724905s&link_type=abstract

American Astronomical Society, AAS Meeting #217, #249.05; Bulletin of the American Astronomical Society, Vol. 43, 2011

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Scientific paper

We define a new cosmological discriminator -- a ``one-sided Amati relation" -- which is defined by only the bright/soft side of the Eiso versus Epeak (Amati) relation, since this does not suffer from significant selection bias. An advantage of this approach is that changing a GRB redshift would only slide it along the one-sided Amati relation, making actual GRB redshifts less important than how GRB brightness and hardness change with cosmological distance. Therefore, it is the slope of this one-sided Amati relation that makes it a cosmological model discriminator. We investigate the limits of the power of this method to discern between cosmological models where dark energy changes with redshift.

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