First Extra-galactic SiO Maser
This is a small part of the microwave spectrum of the maser star IRAS 04553-6825 in the Large Magellanic Cloud (LMC), a satellite galaxy to the Milky Way.
The region shown is centered at a frequency of about 86 GHz (wavelength about 3 mm), where SiO molecules in the atmosphere of this very large star produce a strong emission by the maser effect.
The abscissa shows the velocity, as indicated by the Doppler shift of the SiO emission; the ordinate shows the relative intensity. The line at the centre has a measured velocity of about 275 km/sec, very near the mean velocity of the LMC. There is therefore no doubt that this star is located in the LMC.
The observation was made with a new state-of-art millimetric receiver at the 15-metre Swedish-ESO Submillimetre Telescope (SEST) at the La Silla Observatory. The signal represents 26 hours of observation.
Credit:
ESO
About the Image
| Id: | eso9618b |
| Type: | Chart |
| Release date: | 6 March 1996 |
| Related releases: | eso9618 |
| Size: | 938 x 694 px |
About the Object
| Name: | IRAS 04553-6825, Spectrum |
| Type: | • Local Universe : Star • X - Stars |
| Distance: | 170000 light years |
Colours & filters
| Band | Telescope |
| Swedish–ESO Submillimetre Telescope |
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