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Gaseous Galactic Halos and QSO Absorption Line Systems
H. J. Mo
Recent observations have shown that (some) metal line absorption systems in QSO spectra arise from gas in galactic halos with radii much larger than the optical radii of galaxies.…
New Statistical Measures of the Lya Forest Spectra for Accurate Comparison to Theoretical Models
J. Miralda-Escude, M. Rauch, W. L. W. Sargent +6
We propose a new method of analysis for the \lya forest, namely to measure the 1-point and 2-point joint probability distribution of the transmitted flux. The results for a sample…
Reionization of the Intergalactic Medium and the Damping Wing of the Gunn-Peterson Trough
Jordi Miralda-Escude
Observations of high-redshift quasars show that the IGM must have been reionized at some redshift . If a source of radiation could be observed at the rest-frame Lya wavelength…
Searching for the Earliest Galaxies using the Gunn-Peterson Trough and the Lyman Alpha Emission Line
Jordi Miralda-Escude, Martin J. Rees
If the universe was reionized by O and B stars in an early population of galaxies, the associated supernovae should have enriched the universe to a mean metallicity $\bar Z = 10^{-…
High-Redshift Supernovae and the Metal-Poor Halo Stars: Signatures of the First Generation of Galaxies
Jordi Miralda-Escude, Martin J. Rees
Recent evidence on the metal content of the high-redshift Lyman alpha forest seen in quasar spectra suggests that an early generation of galaxies enriched the intergalactic medium…
A Lower Bound on the Cosmic Baryon Density
David H. Weinberg, Jordi Miralda-Escude, Lars Hernquist +1
We derive analytic lower bounds on the cosmic baryon density by requiring that the high-redshift IGM contain enough neutral hydrogen to produce the observed \lya absorption in quas…