第25回LSTセミナーのご案内

• 日時：2025年7月10日（木）16:30–18:00

• 講師：Yao-Lun Yangさん（理化学研究所）

• 接続先：[tennet:2586]をご参照ください

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PRIMA：遠赤外線天文学が拓く星形成研究の展望 / PRIMA: Future of Far-Infrared Astronomy for Star Formation

Yao-Lun Yang（理化学研究所）

Understanding the origin of solar-type planetary systems remains one of the fundamental questions in astronomy. These systems form within dense, dusty clouds, where high extinction presents a significant challenge for direct observational studies of the physical and chemical processes at the onset of star and planet formation. Over the past decades, most studies have relied on submillimeter and millimeter interferometric observations --- primarily using ALMA --- to probe the cold dust and gas (~10–100 K), helping to constrain the structures and chemistry of planet-forming disks. More recently, the JWST has enabled unprecedented sensitivity at mid-infrared wavelengths, allowing us to characterize hot gas and dust (>1000 K). However, the bulk of the energy emitted by protostars and protoplanetary disks lies in the far-infrared regime (100–1000 K) --- a spectral window that was once accessible through missions such as ISO, AKARI, SOFIA, and Herschel, but is no longer covered by current observatories. The PRobe far-Infrared Mission for Astrophysics (PRIMA) is a proposed mission designed to uniquely fill this observational gap.

PRIMA aims to probe the dominant components of gas and dust in star-forming regions, with a particular focus on protostellar and protoplanetary systems. In this talk, I will introduce the PRIMA mission concept and the efforts currently led by the Japanese astronomical community. I will also present several key science cases in star formation that PRIMA’s 24–235 μm imaging and spectroscopic capabilities can uniquely address. Additionally, I will highlight the synergy between PRIMA and the LST. Finally, I will share opportunities for researchers to get involved in the PRIMA project and contribute to its scientific goals.

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LSTセミナーとは

将来の大型サブミリ波望遠鏡（LST/AtLAST）建設に向けて、サイエンス面でチャレンジしたいことや技術開発面で必要な研究を考える機会として、2021年12月から毎月1回の頻度で開催中のオンラインセミナーです。講演時間と質疑応答の目安は、それぞれ60分および30分です。また、セミナー終了後残っていただき、講演者の方とざっくばらんに意見交換することも可能です。

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コンタクト

LSTセミナーに関するご質問、講演者のご推薦等ございましたら、世話人のLST Science & Technology Promotion Team（lstpt あっと googlegroups.com）までお気軽にご連絡ください。