Statistical Analysis of Lyman alpha Cloud Parameters at High Redshift

Details Statistical Analysis of Lyman alpha Cloud Parameters at High Redshift Statistical Analysis of Lyman alpha Cloud Parameters at High Redshift

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...195.5211a&link_type=abstract

American Astronomical Society, 195th AAS Meeting, #52.11; Bulletin of the American Astronomical Society, Vol. 31, p.1453

Astronomy and Astrophysics

Astronomy

Scientific paper

A statistical analysis of a sample of Lyman alpha clouds containing more than 400 lines with redshifts exceeding 3 is presented. A new nonparametric approach that does not involve data binning is used to investigate the distributions of the column density and the Doppler width parameter. The distributions display a similar dependence on redshift. Furthermore, a paucity of Lyman alpha lines with Doppler parameters less than about 15 km/s is noticed suggesting a possible lower limit on cloud temperatures. The correlation between column density and Doppler parameter is also investigated. Our analysis indicates a marginal correlation between them, which is shown to be statistically insignificant.

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