Effect of Hot Baryons on the Weak-Lensing Shear Power Spectrum

Details Effect of Hot Baryons on the Weak-Lensing Shear Power Spectrum Effect of Hot Baryons on the Weak-Lensing Shear Power Spectrum

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...205.8206z&link_type=abstract

American Astronomical Society Meeting 205, #82.06; Bulletin of the American Astronomical Society, Vol. 36, p.1479

Astronomy and Astrophysics

Astronomy

Scientific paper

We investigate the impact of the intracluster medium on the weak-lensing shear power spectrum (PS). Using a halo model we find that, compared to the dark matter only case, baryonic pressure leads to a suppression of the shear PS on the order of a few percent or more for l ≳ 1000. Cooling/cooled baryons and the intergalactic medium can further alter the shear PS. Therefore, the interpretation of future precision weak lensing data at high multipoles must take into account the effects of baryons.

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