Observational and Theoretical Studies of the Intergalactic Medium

Details Observational and Theoretical Studies of the Intergalactic Medium Observational and Theoretical Studies of the Intergalactic Medium

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21710203s&link_type=abstract

American Astronomical Society, AAS Meeting #217, #102.03; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

The Cosmic Origins Spectrograph (COS) installed on the Hubble Space Telescope provides access to high-quality ultraviolet spectra of the intergalactic medium (IGM) and galactic halos. I will report on new COS results on the physical state, baryon content, and spatial distribution of the the IGM at redshifts z < 0.5. COS has also recently measured the epoch of reionization in helium (He II) toward HE2347-4342 at redshifts z < 2.9. This talk will also describe the Colorado group's numerical simulations of the IGM and dynamical and radiative feedback from galaxy formation, using the adaptive-mesh N-body hydrodynamic code Enzo. These simulations help us understand the effects of IGM shock-heating, metal-transport, radiative cooling, and photoionization of the complex structures in the "Cosmic Web" of matter.

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