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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 @).

June 03, Tuesday, at 11:00 am

" The symbiotic nature of AGN and SF activities of type-1 AGNs probed by the PAH 3.3 micron emission feature "

Ji Hoon Kim

(Subaru Telescope)


The formation and evolution of supermassive black holes (SMBHs) and their host galaxies are tightly connected based on various correlations between the mass of SMBHs and the mass, or velocity dispersion of host galaxy's bulge. Although they are believed to coevolve through various physical processes, such as gas accretion and mergers, the details of these processes are still under hard scrutiny: what governs BH formation and growth, what regulates host galaxy growth, and if their growths have different phases with respect to each other. Regarding the link between the growth of BHs via active galactic nucleus (AGN) activity and the growth of host galaxies through star formation (SF) activity, probing the direct connection between them has been extremely tricky due to their hugely different size scales and the domination of the UV emission and hydrogen recombination lines from UV flux. Utilizing slit-less spectroscopic capability of AKARI space telescope, several mission projects were carried out to measure the 3.3 micron polycyclic aromatic hydrocarbon (PAH) emission feature as a star formation rate proxy and to investigate if the 3.3 micron PAH can be a reliable SFR proxy and how AGN and SF activities of a wide range of AGNs are inter-connected. I will present the results showing the symbiotic nature of these two activities based on several AKARI projects including Quasar Spectroscopic Observation with NIR Grism (QSONG).


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



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