Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1279...24y&link_type=abstract
DECIPHERING THE ANCIENT UNIVERSE WITH GAMMA-RAY BURSTS. AIP Conference Proceedings, Volume 1279, pp. 24-27 (2010).
Astronomy and Astrophysics
Astronomy
Brightness, Dispersion Relations, Gamma-Ray Sources (Astronomical), Dark Matter, Magnitudes And Colors, Luminosities, Emulsions And Suspensions, Gamma-Ray Sources, Gamma-Ray Bursts, Dark Matter
Scientific paper
We formed a GRB cosmology project in Japan, and promote the observational cosmology with Gamma-ray bursts (GRBs). In this paper, we introduce recent result of our project with the spectral Epeak-Luminosity relations. We show the Hubble diagram up to the redshift of z = 8.2, and the confidence contour of the dark energy (ΩΛ) and the dark matter (Ωm) beyond z>2 beyond the current range measured by the Type Ia supernovae. After that, we investigate the origin of data dispersion of the Epeak-brightness relations, and suggest a possible improvement of their accuracy.
Morihara Yoshiyuki
Murakami Toshio
Nakamura Takashi
Takahashi Keitaro
Tsutsui Ryo
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