Английская Википедия:Deci-hertz Interferometer Gravitational wave Observatory

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The DECi-hertz Interferometer Gravitational wave Observatory (or DECIGO) is a proposed Japanese, space-based, gravitational wave observatory. The laser interferometric gravitational wave detector is so named because it is designed to be most sensitive in the frequency band between 0.1 and 10 Hz, filling in the gap between the sensitive bands of LIGO and LISA. Its precursor mission, B-DECIGO, is currently planned for launch in the 2030s, with DECIGO launching at some time afterward.

The design is similar to LISA, with four zero-drag satellite clusters (two colocated) in a triangular arrangement, but using a smaller separation of only 1000 km whose relative displacements are measured by a Fabry–Pérot Michelson interferometer.

Description

The DECi-hertz Interferometer Gravitational wave Observatory (DECIGO) is a proposed Japanese, space-based, gravitational wave observatory.[1][2] It was first described as a Шаблон:Nihongo in a presentation given by Seiji Kawamura in an October 2000 presentation given at the ICRR Satellite Symposium held by the National Astronomical Observatory of Japan.[3] The first mention of the observatory as "DECIGO" was in a presentation given by Naoki Seto, Kawamura, and Takashi Nakamura at a September 2001 meeting of the Physical Society of Japan at Okinawa International University.[4]

It was designed as a follow-up project to KAGRA by the Japanese Gravitational Wave Community (JGWC), and it is currently planned to be launched in 2027.[5] A 2008 paper in the Journal of Physics: Conference Series in 2008, authored by 135 scientists headed by Kawamura, went into significantly more detail, describing the basic initial design ideas.[1] It is designed to be most sensitive in the frequency band between 0.1 and 10 Hz, which better detects gravity waves in the gap between the sensitivity bands of LIGO and LISA.[6]

In a 2021 update, it was described as "four clusters of observatories" placed in heliocentric orbits, with each cluster consisting of an equilateral triangle with legs (or sides) of Шаблон:Convert and a zero-drag satellite at each point. Three of the clusters will be spaced equally around the Sun, and the other will be placed in the same location as one of the others. The placement is designed to facilitate "correlation signals for the detection of primordial gravitational waves". It is planned to launch an unspecified time following B-DECIGO, which has a projected launch sometime in the 2030s.[5]

B-DECIGO

B-DECIGO is a preliminary test of various technologies to be used in DECIGO. It will consist of a single cluster of observatories, each having arm lengths of Шаблон:Convert, a laser wattage of 1 (rather than the 10 watts used for DECIGO), and a mirror mass of Шаблон:Convert.[5] The target is an Earth orbit with an average altitude of Шаблон:Convert.[7] Шаблон:As of, it is planned for launch in the 2030s.[5]

See also

References

Шаблон:Reflist

External links

Шаблон:Gravitational wave observatories

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  1. ↑ 1,0 1,1 Ошибка цитирования Неверный тег <ref>; для сносок kawamura 2008 не указан текст
  2. ↑ Ошибка цитирования Неверный тег <ref>; для сносок kawamura et al 2006 не указан текст
  3. ↑ Ошибка цитирования Неверный тег <ref>; для сносок kawamura 2000 presentation не указан текст
  4. ↑ Ошибка цитирования Неверный тег <ref>; для сносок seto kawamura nakamura 200109 не указан текст
  5. ↑ 5,0 5,1 5,2 5,3 Ошибка цитирования Неверный тег <ref>; для сносок kawamura 2021 status не указан текст
  6. ↑ Ошибка цитирования Неверный тег <ref>; для сносок ando 2009 не указан текст
  7. ↑ Ошибка цитирования Неверный тег <ref>; для сносок sato status 2017 не указан текст
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