Mg II Detection in the Lyman Alpha Forest: Metal Rich Cloud or LSB/Dwarf Galaxy?

Details Mg II Detection in the Lyman Alpha Forest: Metal Rich Cloud or LSB/Dwarf Galaxy? Mg II Detection in the Lyman Alpha Forest: Metal Rich Cloud or LSB/Dwarf Galaxy?

1997-07-14

arxiv.org/abs/astro-ph/9707155v2

Astronomy and Astrophysics

Astrophysics

2 pages, 1 EPS figures, conf_iap.sty To appear in 13th IAP Workshop (1-5 July 1997) "Evolution of the Intergalactic Medium fro

Scientific paper

We report the detection of Mg II absorption in two Lyman alpha forest clouds along the line of sight to PKS 0454+039. These clouds, at redshifts z=0.6248 and z=0.9315, respectively, also have strong Fe II absorption. We present results on the z=0.9315 cloud. The upper limit on log N(HI) is 16.5 cm^-2. Based upon UV background photoionization models, we infer that the cloud has super-solar metallicity. Photoionization by a late-type stellar population is ruled out.

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