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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 : (please change"_at" to @).

January 29, Friday, 11:00 am in 104

" Resolving the Clumpy Structure of the Outflow Winds in Gravitationally Lensed Quasar "

Toru Misawa

(Shinshu University)

The AGN outflow is one of the most important key ingredients for the evolution of quasars as well as for the galaxy formation/evolution. A fraction of absorption lines in quasar spectra are believed to arise via the outflow rather than intervening objects like foreground galaxies and the IGM. Thus, absorption lines are powerful and unique tool to probe the outflows in quasars, which are difficult to be directly observed. However, the weakness of the past studies is that we can trace the outflow through only single sight-line toward the nucleus for each quasar. Using Subaru/HDS and VLT/UVES, we performed high-resolution (R~33,000) spectroscopic observations of images A and B of a gravitationally lensed quasar SDSS J1029+2623 at z~2.197 whose image separation angle (~22.5 arcsec) is the largest among those discovered so far. We discovered that each image has different intrinsic levels of absorptions on the blue side of broad emission lines, and then confirmed that the difference is not due to time variability of the absorption profiles over the time delay between the images (~744 days) but rather due to differences along the sightlines. We discuss a possible geometry and internal structure of the outflowing wind based on these results.

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

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