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Session 51 - WIRE, MSX and the Cosmic Background.
Display session, Tuesday, January 14
In models with a cosmological constant, a significant component of the cosmic microwave background (CMB) anisotropy is produced at rather low redshifts, z < 4. In these models, the gravitational potential perturbations begin to evolve at late times, shifting the frequencies of photons passing though them. Since the potential reflects the matter density, the latter should be correlated with the CMB anisotropy. We examine this correlation and discuss the prospects for using an x-ray/CMB comparison to detect a cosmological constant. In particular, we examine the constraints on a cosmological constant resulting from cross correlating 4-year COBE DMR maps with X-ray maps from the HEAO 1 A-2 survey.
Program listing for Tuesday