Kép:Proxima centauri.jpg
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[edit] Summary
| Description |
Atlas Image mosaic, covering 8´ × 8´ on the sky of the nearest star to our Sun, Proxima Centauri, which is the nearest member of the Centauri triple star system. It is about 1.295 parsecs (4.22 light years) from us (its parallax is less than the 1 arcsec which defines the parsec distance unit). It is quite red in the optical. This is because it is of very late spectral type, i.e., mid-M type, and therefore has a cool surface temperature. (In the 2MASS image, the star looks relatively "warm.") Proxima Cen is about 12000 astronomical units from Alpha Cen, which itself is at a somewhat larger distance from us of 1.347 pc. Proxima Cen is modestly "active," as a so-called "flare star," characterized by variable emission lines in its spectrum. The flares arise from a surprisingly active corona, similar to that of the Sun's (Wood et al. 2001, ApJ, 547, L49). |
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| Author |
2MASS project |
| Permission |
Under the 2MASS free license, use of this image must be accompanied by the following acknowledgement: "Atlas Image [or Atlas Image mosaic] obtained as part of the Two Micron All Sky Survey (2MASS), a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute, funded by the National Aeronautics and Space Administration and the National Science Foundation." |
| Other versions | none |
[edit] Licensing
Under the 2MASS free license, use of this image must be accompanied by the following acknowledgement: "Atlas Image [or Atlas Image mosaic] obtained as part of the Two Micron All Sky Survey (2MASS), a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute, funded by the National Aeronautics and Space Administration and the National Science Foundation."
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