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東京大学・天文学教育研究センターでは2003年4月から談話会を開いています。
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ML: semiadm _at_ ioa.s.u-tokyo.ac.jp
please replace _at_ with @
Language: English
Language: English
Abstract: The James Webb Space Telescope (JWST) is NASA’s flagship astronomy and astrophysics mission that was launched on December 25, 2021 and is operating in a halo orbit at Lagrange Point 2 (L2), 1.5 million km from Earth. With a 6.5-meter diameter primary mirror that is cooled to 50K and four infrared instruments, JWST is investigating four major science areas: ・First light and reionization: JWST is a powerful time machine with infrared vision that is looking back 13.5 billion years to see the first stars and galaxies forming in the early Universe. ・Assembly of galaxies: JWST’s unprecedented infrared sensitivity enables astronomers to compare the faintest, earliest galaxies to today’s spiral and elliptical galaxies, helping us understand how galaxies assemble over billions of years. ・Birth of stars and protoplanetary systems: JWST can see into massive clouds of dust that are opaque to visible-light observatories (like Hubble), where stars and planetary systems are being born. ・Planets and origins of life: JWST is telling us more about the atmospheres of extrasolar planets, and perhaps will even find the building blocks of life elsewhere in the Universe. In addition to other planetary systems, JWST will also study objects within our own solar system.
This presentation starts with the scientific motivation of JWST and reviews the major technological innovations that were needed to build the observatory. The four JWST instruments are presented with the optical path of the NIRSpec animated. The infrared focal plane arrays (FPAs) are presented and performance of the FPAs and telescope optics are reviewed; telescope performance is exceeding specification in spite of micrometeoroid hits on the primary mirror. The process of image data collection and processing is demonstrated by the iconic “Cosmic Cliffs” image (shown below). The presentation concludes with scientific examples that demonstrate the breadth of JWST capability and glimpse of the science that will be performed over the next two decades.
| # | Date | Speaker | Title | Chair |
| 419 | 2024年6月25日火) 11:00-12:00 | Meghan Dorn (Teledyne Scientific & Imaging) | Teledyne Imaging Sensors Infrared FPAs for Astronomy & Earth Observation | I.Sakon |
| 420 | 2024年6月25日(火) 16:00-17:00 | James W. Beletic (Teledyne Scientific & Imaging) | The James Webb Space Telescope (JWST) - Humankind’s greatest space science facility | TBA |
| 421 | 2024年8月5日(月) 15:30-16:30 | 郡和範 (国立天文台科学研究部) | ダークマター・ダークエネルギーの正体を暴く天文観測 | I.Sakon |
詳細はこちら: 令和6(2024)年度談話会
| # | Date | Speaker | Title | Chair |
| 418(臨時) | 2024年6月19日(水) 14:00-14:30 | F. Peter Schloerb (Univ. of Massachusetts Amherst) | Thermal stabilization of the Large Millimeter Telescope | I.Sakon/K.Kohno |
| 417(臨時) | 2024年6月19日(水) 13:30-14:00 | David H. Hughes (Instituto Nacional de Astrofísica, Óptica y Electrónica) | The Large Millimeter Telescope (LMT) Alfonso Serrano: current status and future upgrades | I.Sakon/K.Kohno |
| 416 | 2024年6月13日(木) 15:30-16:30 | 服部公平 (統計数理研究所/国立天文台) | Dynamics and chemistry of the Milky Way revealed from Gaia data | I. Sakon |
| 415 | 2024年6月6日(木) 15:30-16:30 | Jong-Hak Woo (Seoul National University) | Understanding black hole engine based on time-domain studies | K. Morokuma |
| 414 | 2024年5月16日(木) 15:30-16:30 | Kana Morokuma (Institute of Astronomy, University of Tokyo) | Galaxy evolution in overdense environments | I. Sakon |
