Mathematics – Logic
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...198.5206b&link_type=abstract
American Astronomical Society, 198th AAS Meeting, #52.06; Bulletin of the American Astronomical Society, Vol. 33, p.863
Mathematics
Logic
Scientific paper
If galactic winds escape their host galaxies and impact the intergalactic medium (IGM) then probes of the diffuse IGM, such as the Lyman-alpha forest, should reflect this tremendous energy input. Surprisingly, simulations that do not include winds accurately reproduce the observed Lyman-alpha absorption properties. On the other hand, new metal-line observations indicate that the low-density IGM has been polluted with metals (presumably via galactic outflows). In this talk, I will summarize the conflicting observational evidence and then present results from cosmological simulations which include galactic feedback in order to try to answer the following questions: (1) how would energy injection into the IGM modify the predicted Lyman-alpha statistics? (2) what are the metal line observations really telling us? (3) can the low temperature of the IGM be reconciled with the large amount of pre-heating that gas in groups and clusters seems to have undergone?
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