Direct Detection of Cosmological Dust

Details Direct Detection of Cosmological Dust Direct Detection of Cosmological Dust

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000cxo..prop..707p&link_type=abstract

Chandra Proposal ID #02900468

Mathematics

Logic

Chandra Proposal Id #02900468

Scientific paper

Detection of an X-ray scattering halo may be the only direct and unambiguous way to reveal dust in the intergalactic medium. Somewhat surprisingly, detecting cosmologically interesting amounts of dust should not be difficult with Chandra. We propose to search for a halo in the image of the soft X-ray bright, distant QSO 1508+5714 (z = 4.30). We can easily detect the amount of dust that could mimic the effect of a non-zero cosmological constant on the Hubble diagram of SNe Ia. Non-detection should settle this issue definitively. As a byproduct, we will obtain constraints on the history of dust from global star formation (or the other way around).

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