CHARA array

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The CHARA Array is an optical astronomical interferometer operated by The Center for High Angular Resolution Astronomy (CHARA) of the Georgia State University (GSU). CHARA is the World's highest angular resolution telescope at near-infrared wavelengths.

The CHARA Array is an interferometer formed from six 1 meter (40-inch) telescopes arranged along three axes with a maximum separation length of 330 m. The light beams travel through vacuum tubes and are combined optically, requiring a building 100 meters long with movable mirrors to keep the light in phase as the earth rotates. CHARA began scientific use in 2002 and began "routine operations" in early 2004. In the infrared, the array has an interferometric imaging resolution of 0.0005 arcseconds. All six telescopes are in regular use for scientific observations and as of late 2005 imaging results are routinely acquired. The array captured the first image of the surface of a main sequence star other than the sun published in early 2007.^[1]

The configuration of six 1-meter diameter telescopes with separations up to 330 meter make it the most powerful imaging interferometer in the world. It is located at the Mount Wilson Observatory, near Los Angeles, California.

[edit] See also

• Cambridge Optical Aperture Synthesis Telescope (COAST)
• Navy Prototype Optical Interferometer
• Very Large Telescope
• Infrared Optical Telescope Array
• Magdalena Ridge Observatory Interferometer

[edit] External links

• CHARA website
• First 4-Telescope Fringes at the CHARA Array
• Vega Mystery Solved; Red Dwarf Mystery Grows, Sky and Telescope article about CHARA.
• First Results from the CHARA Array. III. Oblateness, Rotational Velocity and Gravity Darkening of Alderamin archiv.org

[edit] References

1. ^ U-M astronomers capture the first image of surface features on a sun-like star, University of Michigan, 2007-05-31