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Uranium in the Spectrum of an Old Star
The observed spectrum (dots) of the old star HE 1523-0901in the region of the uranium (U II) line at a wavelength of 385.96 nm. The origin of some of the other spectral lines in the region is also indicated (e.g. iron, neodymium, samarium, magnesium). The synthetic spectrum (thin and dotted lines) was computed for the adopted abundances of the stable elements and for four different values of the abundance of uranium atoms in the atmosphere of the star. The uppermost line (corresponding to no uranium at all) clearly does not fit the observed spectrum at all. The best fit is provided by the middle (red) line.
Credit:
ESO
About the Image
| Id: | eso0723b |
| Type: | Chart |
| Release date: | 10 May 2007 |
| Related releases: | eso0723 |
| Size: | 1184 x 795 px |
About the Object
| Name: | HE 1523-0901 |
| Type: | • Milky Way : Star • X - Stars |
| Distance: | 90 light years |
Colours & filters
| Band | Wavelength | Telescope |
| Ultraviolet UII |
385 nm | Very Large Telescope UVES |
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