Can I read Measuring Omega Baryon from the Helium Lyman-Alpha Forest on EtoBox?

Measuring Omega Baryon from the Helium Lyman-Alpha Forest by Wadsley, James W.; Hogan, Craig J.; Anderson, Scott F. is a scholarly article available to read on EtoBox.

What is Measuring Omega Baryon from the Helium Lyman-Alpha Forest about?

A new method to extract Omega_b from high redshift intergalactic absorption is described, based on the distribution of HeII Ly-alpha optical depths in the voids in the ionization zone of quasars. A preliminary estimate from recent HST-STIS spectra of PKS 1935-692 at z=3 gives Omega_b h^2 = 0.013^{+0.002}_{-0.001} (1-sigma statistical errors, for a Lambda-CDM cosmology with additional systematic uncertainties) consistent with other estimates.

Author

Wadsley, James W.; Hogan, Craig J.; Anderson, Scott F.

Published

1999

Language

EN