The galactic HII region RCW 120

Comparison between an image of the Galactic HII region RCW 120 in the visible (R-band; as obtained by the ESO Schmidt Telescope) and in the submillimetre with LABOCA on APEX, highlighting the need to observe in this wavelength range. The LABOCA image has an exposure of only slightly more than 3 hours. The expanding shell causes the surrounding gas to collapse into clumps, which are the cradles of massive stars. As the gas in these clumps is still very cold, around -250 degrees Celsius, they can only be seen at submillimetre wavelengths. Thanks to the high sensitivity and large field of view of LABOCA, astronomers could detect clumps that are four times fainter than was possible before. As the brightness is also a measure of the mass of these stellar embryos, this will allow scientists to study the formation of more representative, less massive stars.

Crédit:

ESO

À propos de l'image

Identification:eso0735b
Type:Observation
Date de publication:5 août 2007
Communiqués de presse en rapport:eso0735
Taille:2434 x 1164 px

À propos de l'objet

Nom:RCW120
Type:Milky Way : Nebula : Appearance : Emission : H II Region
Distance:4500 années lumière
Catégorie:Nebulae

Image Formats

Grand JPEG
1,2 Mio
JPEG taille écran
294,9 Kio

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1024x768
473,2 Kio
1280x1024
690,5 Kio
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Couleurs & filtres

DomaineLongueur d'ondeTélescope
Visible
R
630 nmESO 1-metre Schmidt telescope
Millimétrique
Submillimetre
870 μmAtacama Pathfinder Experiment
LABOCA