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The Subaru Seminar is usually held in Room 104 of the Hilo Base Facility, adjacent to the main lobby. Everyone is welcome to attend. If you are interested in giving a seminar, please contact Subaru seminar organizers (Tae-Soo Pyo, Sherry Yeh, Nagayoshi Ohashi) by email : (please change"_at" to @).

October 30, Friday, 11:00 am in 104

" Metal-Poor Gas During the Peak of Cosmic Star Formation "

Thomas Cooper


The gas around and between galaxies, generally too faint to see in emission, can be observed via absorption signatures imprinted on the spectra of background quasars. Low redshift surveys of partially ionized absorbers that are optically thick at the Lyman limit (Lyman Limit Systems) have found that they trace both high (approximately solar) and low ([X/H]<-1) metallicity gas, suggesting these absorption features are produced by both accreting and enriched recycling/outflowing winds. I will discuss the results of metallicity studies of Lyman Limit Systems at z~3.5, when the cosmic star formation rate is largest and the distinctions between inflows and outflows should be more pronounced, and the implications for galaxy formation models and simulations.

Seminars are also held at JAC, CFHT, and IfA.

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