The astrophysics of the intergalactic medium at intermediate redshifts

Details The astrophysics of the intergalactic medium at intermediate redshifts The astrophysics of the intergalactic medium at intermediate redshifts

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004hst..prop10288k&link_type=abstract

HST Proposal ID #10288

Statistics

Hst Proposal Id #10288 Quasar Absorption Lines/Igm

Scientific paper

We will use the 334 low resolution FOS spectra and the 31 STIS spectra already in the archive to determine the properties of the 0.3 < z < 2 IGM. All of the mentioned spectra are of bright QSOs and cover part of the Lyman alpha forest. We will compute traditional line statistics, but more importantly we will compute a number of pixel statistics using the same analysis methods used by groups that simulate the Lyman alpha forest. Examples of the pixel statistics include the flux power spectrum, the distribution of flux per pixel, and the mean flux decrement of the Lyman alpha forest. The results will enable for the first time a detailed comparison between data and theory at z < 1.7. Specific scientific issues that will be addressed with the results of this research include {1} The spatial structure of the IGM, {2} The thermo-dynamical state of the IGM, {3} The intensity and evolution of the UV background, and {4} The effects of galaxy feedback on the IGM.

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