Intergalactic D/H, Metals, and Ionizing Background

Details Intergalactic D/H, Metals, and Ionizing Background Intergalactic D/H, Metals, and Ionizing Background

May 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...192.4904s&link_type=abstract

American Astronomical Society, 192nd AAS Meeting, #49.04; Bulletin of the American Astronomical Society, Vol. 30, p.885

Astronomy and Astrophysics

Astronomy

Scientific paper

Measurements of D/H, trace heavy elements, and He II Gunn-Peterson absorption in the intergalactic medium (IGM) provide key diagnostics of the baryon density and its spatial distribution, the ionizing background radiation, and processes of star formation and chemical evolution. I will describe the current state of these measurements, together with theoretical implications for related subjects: the first quasars and starburst galaxies, IGM reionization, and stellar astration of deuterium. Two future NASA ultraviolet missions (FUSE and HST/COS) will provide powerful diagnostics of these processes at redshifts z = 2-4.

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