Subaru Seminars



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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, Kumiko S. Usuda, Naoyuki Tamura, Tomonori Usuda) by email : sseminar_at_subaru.naoj.org (please change"_at" to @).

January 10, Monday, at 11:00 am

" Comparison of AGN and Nuclear Starburst Activities in Seyfert Galaxies "

Nagisa Oi

(Subaru Telescope / SOKENDAI)


A starburst in the central region of Active Galactic Nucleus (AGN) is thought to be a controller of AGN activity. However, we do not have any common understanding of how the nuclear starburst actually controls the AGN activity yet. There are some models, and these different models predict different relationships between nuclear starburst and AGN. Therefore, measuring the nuclear starburst activities quantitatively and comparing them with AGN activities over a wide range in AGN luminosity can put constraints on the models. In this talk, I will describe our results from the near-IR, K- and L-bands spectra of Seyfert galaxies taken with IRTF/SpeX. We find a positive relationship between the two activities. We also find a significant difference in K-L colors between type 1 and 2 Seyfert galaxies. Our results imply that the AGN activity is triggered by a turbulence induced by the nuclear starburst which is occurring in the outer part of dusty torus.


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



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