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AKARI presents detailed all-sky map in infrared light

11 July 2007

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The entire sky in infrared light as seen by AKARI

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This image shows the entire sky in infrared light at nine micrometres. The bright stripe extending from left to right is the disc of our own Milky Way Galaxy. Several bright regions corresponding to strong infrared radiation appear along or next to the Galactic Plane. These regions are sites of newly born stars. At the brightest region in the very centre of the image, towards the centre of our Galaxy, old stars crowd together. AKARI observed the infrared radiation emitted from the heated interstellar dust.

Credits: JAXA

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The inscriptions indicate constellations and regions of intense star formation. The data used to create this image have a spatial resolution of about nine arcseconds, several times finer than IRAS in 1983. Further detailed analysis of this data will help to learn more about the physical conditions of these star formation regions.

Credits: JAXA

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The constellation Orion and the winter Milky Way

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AKARI’s Far Infrared Surveyor (FIS) instrument also observed the Milky Way and the Orion region. In this image, two views at visual light (left) and infrared light (right) are juxtaposed, both covering a region of about 30x40 square degrees. AKARI’s view is taken at 140 micrometres. For the first time ever, AKARI provided coverage of the Orion region at infrared wavelengths longer than 100 micrometres at such fine resolution.

The right side of the image covers the constellation Orion while the left side shows the Monoceros. The Galactic Plane is located from the top to bottom in the left side of the image. Cold dust in the Galactic Plane appears as diffuse radiation over the entire image.

Credits: Hideo Fukushima, National Astronomical Observatory Japan (left); JAXA (right)

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Star forming region in the constellation Cygnus

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This false-colour composite was obtained by AKARI’s Far Infrared Surveyor (FIS) instrument at 90 and 140 micrometres. It shows star-forming regions in the constellation Cygnus, one of the brightest regions in the Milky Way. The image covers 7.6 x 10.0 square degrees. This region is in a direction along the so-called ‘Orion arm’, one of the spiral arms of our Galaxy. Many objects at distances of three thousand to ten thousand light years are projected on this small region. The Galactic plane appears from the top-left to bottom-right.

Credits: JAXA

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