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, Naoyuki Tamura, Tomonori Usuda) by email : (please change"_at_" to @).

Oct 19, Monday, at 11:00 am

" Massive star feedback in starburst galaxies "

Sherry Yeh

(University of Toronto)

Feedback of massive stars is vital to galaxy evolution and important in limiting ISM properties. In this talk, I will discuss massive star feedback mechanisms, such as radiation pressure and stellar winds, employing both theoretical approaches and observational studies. First I will discuss using the ionization parameter as a tool to assess feedback of radiation pressure in starburst galaxies, and HII region structures and their emission line spectra under the influence of radiation pressure and stellar wind feedback. I will then present the first fully calibrated molecular hydrogen emission image of the 30 Doradus Nebula. Molecular hydrogen emission is a key to quantify massive star feedback, and 30 Doradus is the nearest starburst region which allows detailed studies of ISM properties in starburst environments. This is the first time one has direct access to quantify energy feedback from massive stars and its origins with a tremendous amount of spatial details. I will argue that radiation pressure is an important feedback mechanism in starburst systems, whereas stellar winds are not likely as significant a feedback mechanism as previously suggested in the literature.

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

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