Big Bang Observer

Big Bang Observer

Alternative names	BBO
Organization	European Space Agency
Telescope style	gravitational-wave observatory
[edit on Wikidata]

The Big Bang Observer (BBO) is a proposed successor to the Laser Interferometer Space Antenna (LISA) by the European Space Agency. The primary scientific goal is the observation of gravitational waves from the time shortly after the Big Bang, but it would also be able to detect younger sources of gravitational radiation, like binary inspirals. BBO would likely be sensitive to all LIGO and LISA sources, and others. Its extreme sensitivity would come from the higher-power lasers, and correlation of signals from several different interferometers that would be placed around the Sun.

The first phase resembles LISA, consisting of three spacecraft flown in a triangular pattern. The second phase adds three more triangles (twelve spacecraft total), spaced 120° apart in solar orbit, with one position having two overlapping triangles in a hexagram formation.

The individual satellites would differ from those in LISA by having far more powerful lasers. In addition each triangle will be much smaller than the triangles in LISA's pattern, about 50,000 km instead of 1 to 5 million km. Because of this smaller size, the test masses will experience smaller tidal deviations, and thus can be locked on a particular fringe of the interferometer — much as in LIGO. By contrast, LISA's test masses will fly in an essentially free orbit, with the spacecraft flying around them, and interferometer fringes will simply be counted, in a technique called "time-delay interferometry".

The BBO instruments present massive technological challenges. Funding has not been allocated for development, and even if selected for development, optimistic estimates place the instrument's launch date many decades away.

See also

• Cosmic gravitational wave background
• Gravitational wave
• Laser Interferometer Space Antenna
• LISA Pathfinder

Further reading

• Crowder, Jeff; Cronish, Neil J. (October 2005). "Beyond LISA: Exploring Future Gravitational Wave Missions". Physical Review D. 72 (8): 083005. arXiv:gr-qc/0506015. Bibcode:2005PhRvD..72h3005C. doi:10.1103/PhysRevD.72.083005. S2CID 119396842.
• Gravitational Wave Missions from LISA to Big Bang Observer, WM Folkner, JPL - 2005
• The Big Bang Observer, Gregory Harry (MIT), LIGO-G0900426

This article about a specific observatory, telescope or astronomical instrument is a stub. You can help Wikipedia by expanding it.

• v
• t
• e

This spacecraft or satellite related article is a stub. You can help Wikipedia by expanding it.

• v
• t
• e

This page was last edited on 20 December 2022, at 20:17