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.

Credit:

ESO

About the Image

Id:eso0735b
Type:Observation
Release date:5 August 2007
Related releases:eso0735
Size:2434 x 1164 px

About the Object

Name:RCW120
Type:• Milky Way : Nebula : Appearance : Emission : H II Region
• X - Nebulae
Distance:4500 light years

Image Formats

Large JPEG
1.2 MB
Screensize JPEG
294.3 KB

Wallpapers

1024x768
472.6 KB
1280x1024
689.9 KB
1600x1200
942.9 KB
1920x1200
1.1 MB
2048x1536
1.3 MB

Colours & filters

BandWavelengthTelescope
Optical
R
630 nmESO 1-metre Schmidt telescope
Millimeter
Submillimetre
870 μmAtacama Pathfinder Experiment
LABOCA

 

Also see our