Arcminute Microkelvin Imager
The long baseline array of AMI, utilizing antennas from the Ryle Telescope. The telescopes have been re-positioned since this photo was taken.
Location:	Mullard Radio Astronomy Observatory, Cambridge (UK)
Wavelength:	12-18 GHz
Built:	2003-2005
Website:	AMI website

The Arcminute Microkelvin Imager (AMI) is an interferometer radio telescope designed principally to image secondary anisotropies in the cosmic microwave background (CMB) at higher angular resolution than the Very Small Array. It consists of two interferometric arrays sited at the Mullard Radio Astronomy Observatory in Cambridge (UK), both operating in the frequency range 12-18 GHz. The short baseline array consists of ten 3.7-m parabolic antennas while the long-baseline array is composed of seven 13m antennas. The larger 13m antennas are currently being upgraded with new receivers. Wikipedia does not have an article with this exact name. ... The Ryle Telescope was re-arranged to form the long baseline array of AMI after this photo was taken. ... Mullard Radio Astronomy Observatory is home to a number of large aperture synthesis radio telescopes, including the One-Mile Telescope, 5km Ryle Telescope, and the Arcminute Microkelvin Imager. ... Shown within Cambridgeshire Geography Status: City (1951) Region: East of England Admin. ... The wavelength is the distance between repeating units of a wave pattern. ... The 64 meter radio telescope at Parkes Observatory A radio telescope is a form of radio receiver used in astronomy. ... Look up anisotropy in Wiktionary, the free dictionary. ... WMAP image of the CMB anisotropy,Cosmic microwave background radiation(June 2003) The cosmic microwave background radiation (CMB) is a form of electromagnetic radiation that fills the whole of the universe. ... The Very Small Array is a 14-element interferometer perched at an elevation of 3000 metres on Tenerife in the Canary Islands. ... It has been suggested that Optical interferometry be merged into this article or section. ... Mullard Radio Astronomy Observatory is home to a number of large aperture synthesis radio telescopes, including the One-Mile Telescope, 5km Ryle Telescope, and the Arcminute Microkelvin Imager. ...

The main goals of the project are to carry out a survey of clusters of galaxies via the Sunyaev-Zel'dovich effect (the scattering of the CMB off gas in the cluster), with follow-up observations at other wavelengths, and to do pointed observations of individual clusters. AMI will also make very high resolution observations of the primordial CMB power spectrum. The Sunyaev-Zeldovich effect (SZ effect or Sunyaev-Zeldovich theory) is due to high energy electrons distorting the cosmic microwave background radiation (CMB) through the inverse Compton effect, in which some of the high energy of the electrons is transferred to the low energy photons. ...

The resulting catalogue of galaxy clusters could shed light on the nature of dark energy (thought to account for about 70% of the energy density of the Universe). Full survey observations commenced after commissioning observations in August 2005, which mapped the cluster plasma in Abell 1914. The galaxies of HCG 87, about four hundred million light-years distant. ... In physical cosmology, dark energy is a hypothetical form of energy that permeates all of space and has strong negative pressure. ...

See also

• South Pole Telescope
• Sunyaev-Zel'dovich Array

The South Pole Telescope or (SPT) is a project to build a submillimetre telescope at the South Pole. ... The Sunyaev-Zeldovic Array (SZA) in California is surveying the Cosmic Microwave Background to find clusters of galaxies. ...

References

• AMI Collaboration. "High-significance Sunyaev-Zel'dovich measurement: Abell 1914 seen with the Arcminute Microkelvin Imager". Monthly Notices of the Royal Astronomical Society: Letters 369: L1. DOI:10.1111/j.1745-3933.2006.00151.x. arXiv:astro-ph/0509215. 
• Arcminute MicroKelvin Imager official page. Retrieved on 2006-10-18.
• Arcminute Microkelvin Imager unofficial webpage. Retrieved on 2006-10-18.

A digital object identifier (or DOI) is a standard for persistently identifying a piece of intellectual property on a digital network and associating it with related data, the metadata, in a structured extensible way. ... arXiv (pronounced archive, as if the X were the Greek letter χ) is an archive for electronic preprints of scientific papers in the fields of physics, mathematics, computer science and biology which can be accessed via the internet. ... For the Manfred Mann album, see 2006 (album). ... October 18 is the 291st day of the year (292nd in leap years). ... For the Manfred Mann album, see 2006 (album). ... October 18 is the 291st day of the year (292nd in leap years). ...

Further reading

• Jones, Michael (2001). "SZ surveys with the Arcminute MicroKelvin Imager". arXiv:astro-ph/0109351. 
• Kneissl, Rüdiger; et al. (2001). "Surveying the sky with the Arcminute MicroKelvin Imager: expected constraints on galaxy cluster evolution and cosmology". MNRAS 328: 783. arXiv:astro-ph/0103042.