National Astronomical Observatory of Japan : The Graduate University for Advanced Studies (SOKENDAI)
National Astronomical Observatory of Japan : The Graduate University for Advanced Studies (SOKENDAI)
National Astronomical Observatory of Japan
National Astronomical Observatory of Japan : The Graduate University for Advanced Studies (SOKENDAI)
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)
出版者
宇宙航空研究開発機構(JAXA)
出版者（英）
Japan Aerospace Exploration Agency (JAXA)
雑誌名
宇宙航空研究開発機構特別資料
雑誌名(英)
JAXA Special Publication: The Cosmic Wheel and the Legacy of the AKARI archive: from galaxies and stars to planets and life
巻
JAXA-SP-17-009E
ページ
261 - 264
発行年
2018-03-09
会議概要（会議名, 開催地, 会期, 主催者等）
第4回「あかり」国際会議 (2017年10月17-20日. 東京大学), 文京区, 東京
会議概要（会議名, 開催地, 会期, 主催者等）（英）
The 4th AKARI International Conference: The Cosmic Wheel and the Legacy of the AKARI archive: from galaxies and stars to planets and life (October 17-20, 2017. The University of Tokyo), Bunkyo-ku, Tokyo, Japan
抄録（英）
Future possibility of far-infrared and terahertz intensity interferometry in space is discussed. Fast photon counting detectors with 1 ns time resolution and NEP less than 10(exp -17) W/square root of Hz can resolve all photon arrivals from bright far-infrared sources cataloged by AKARI. Intensity correlation due to photon bunches enable delay time measurements, and complex visibility is obtained for aperture synthesis imaging. Precise timing measurements on independent cryogenic telescopes and formation flights enable a long baseline intensity interferometer in space. In this paper, we discuss on a simulation based study to compare the intensity interferometry with heterodyne (amplitude) interferometry. Although the intensity interferometry requires longer integration time for the delay time measurements, the intensity cross correlation is stable against atmospheric phase fluctuation, which enables long baseline observations from ground. From space, sensitivity gain of direct detectors and photon counting detectors over heterodyne technologies can be several orders of magnitude under low background condition. The THz intensity interferometers can resolve many compact AKARI sources with angular resolution better than ALMA, and resolve inner region of protoplanetary disks and active galactic nuclei.
内容記述
形態: カラー図版あり
内容記述（英）
Physical characteristics: Original contains color illustrations
Proposal of Photon Counting Terahertz Interferometry
AA1730026047.pdf
(591.78KB)
