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SKY-MAP.ORG / WIKISKY • View topic - AKARI: Sharpest infrared sky map takes galaxy census

AKARI: Sharpest infrared sky map takes galaxy census

AKARI: Sharpest infrared sky map takes galaxy census

Postby admin » Wed Jul 11, 2007 1:18 pm

The most detailed survey of the entire sky at infrared wavelengths has been made by Japan's AKARI satellite. It will help astronomers produce a complete census of all nearby galaxies.

AKARI, which uses a 0.7-metre-wide mirror, launched into space in February 2006. Now, it has made the first all-sky infrared survey since the IRAS (Infrared Astronomical Satellite) mission (http://sky-map.org?img_source=IRAS), a joint project of the US, UK and the Netherlands, made such a map more than 20 years ago.

"AKARI seeks to improve and extend the IRAS survey in many ways," says Chris Pearson, an AKARI team member at the Japan Aerospace Exploration Agency (JAXA) in Sagamihara, Japan.

AKARI can resolve much more detail than IRAS (see image at right, below) and surveys the sky at a wider range of wavelengths (six infrared wavebands versus IRAS's four).

It is also the first survey to study wavelengths longer than 100 micrometres, allowing astronomers to detect very cool objects. "We expect to detect objects that were too cold even for IRAS to see, such as populations of extremely cool galaxies," Pearson told New Scientist.

The survey should turn up all of the galaxies in the nearby universe, he says. "Due to the wide coverage of the sky, there also exists the potential for the discovery of extremely rare and unusual objects, such as primeval galaxies . . . [This] will provide important clues to the formation of the very first galaxies in the universe."

AKARI will continue to survey the sky until it loses its 170 litres of liquid helium, which it uses to keep its infrared detectors cold. The helium is expected to last until 9 September 2007, and then mission controllers expect to use mechanical coolers to observe objects at near-infrared wavelengths for another year.

The survey was presented on Wednesday at a cosmology conference called "From IRAS to Herschel and Planck" in London, UK.

Image
Source:
http://space.newscientist.com/article/dn12238-sharpest-infrared-sky-map-takes-galaxy-census.html
Read more:
http://www.esa.int/esaCP/SEM4OXGYX3F_index_0.html
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Re: AKARI: Sharpest infrared sky map takes galaxy census

Postby tsumare » Tue Jan 04, 2011 6:26 am

Does anyone know what the next phase of the 2010 census involves, and what jobs will be available? I worked for the census earlier this year and was just wondering what type of training we will be going through and if we will have to take the initial test again. Also, will this phase pay more, less, about the same?? Any info is appreciated.
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Re: AKARI: Sharpest infrared sky map takes galaxy census

Postby chengliu » Fri Jun 10, 2011 1:54 am

While I have been 'on the road' doing my magic thing for Chef Boyardee, I have read September In The Rain, the Nelson Riddle biograph
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