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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 : sseminar_at_subaru.naoj.org (please change"_at" to @).

August 4, Monday, at 11:00 am

" Precious Metals in SDSS Quasar Spectra "

Kathy Cooksey

(UH Hilo)


Spectroscopic surveys of quasars yield a random sample of intervening absorbing gas clouds that can be used to constrain the on-going and summative enrichment processes in the universe. The CIV and MgII doublets have proven to be important tracers of the circum-galactic medium and its evolution from z = 6 to 0. We vastly improved the 1.5 < z < 4.5 absorber measurements by identifying over 15,000 CIV systems from a survey of thousands of SDSS DR7 QSOs. MgII absorption systems have been well-studied at 0.4 < z < 2.3, in SDSS quasar spectra, since the early data-release, and we surveyed the SDSS DR7 quasar catalog for MgII absorbers, as part of our on-going effort to compile fairly comparable samples of metal lines. I will summarize the SDSS CIV and MgII absorbers, relate them to galaxies and galaxy evolution, and discuss what's next.


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



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