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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 (Tadayuki Kodama, Nagayoshi Ohashi, Tomonori Usuda) by email : sseminar_at_subaru.naoj.org (please change"_at_" to @).

Feb 11, Monday, at 11:00 am

" Lyman `bump' galaxies: Strong Lyman continuum emitters "

Akio Inoue

(Osaka Sangyo University)


Motivated by the discovery of galaxies emitting surprisingly strong Lyman continuum (lambda_rest<900A), I have proposed a new spectral model of galaxies, taking into account the escape of stellar and nebular Lyman continua from galaxies. Beyond the classical Stromgren sphere model, I considered matter bounded nebulae and the escape of nebular recombination Lyman continuum. The model predicts a spectral bump just below the Lyman limit, not the break usually expected. Even with this Lyman "bump" model, however, the observed strength of the Lyman continuum of some galaxies may require unusual stellar populations which emit more strong Lyman continuum such as extremely metal-poor or even metal-free stars.


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



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