Lowell Observatory Colloquia

Lyman Alpha and Galaxy Formation: An Observer's Perspective

Arjun Dey, NOAO

Lowell Observatory, Giclas Lecture Hall, 05 April, 2012 at 3:30 p.m.

Lyman alpha has long been used as a signpost of young galaxies in the distant Universe. I will describe some recent results and work in progress on two ongoing searches for Lyman alpha emission at "low"-redshift (z~2) for Lyman alpha "blobs" (giant, 100-kpc clouds of glowing, galaxy-forming gas) and much lower mass Lyman alpha emitters, which may be the building blocks of larger galaxies. I will also report on our discovery of a strong HeII emitting Lya blob, which may be the first case of an extremely low-metallicity galaxy forming environment. Finally, I will talk briefly about the BigBOSS project planned for the Mayall telescope, a cost-effective dark energy project for this decade.

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