Observed spectrum of the old star CS 31082-001

The observed spectrum (dots) of the old star CS 31082-001 in the region of the uranium (U II) line at 385.96 nm. The origin of some of the other spectral lines in the region is also indicated (e.g. iron, neodymium). The synthetic spectrum (thin line) was computed for the adopted abundances of the stable elements and for four different values of the abundance (by number) 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, representing a uranium abundance of approximately 6% of the solar value.

Crediti:

ESO

Riguardo l'immagine

Identificazione:eso0106b
Tipo:Osservazione
Data di rilascio:07 Febbraio 2001
Notizie relative:eso0106
Grandezza:1502 x 1035 px

Riguardo all'oggetto

Nome:CS 31082-001
Tipo:Milky Way : Star
Categoria:Stars

Formati delle immagini

JPEG grande
124,1 KB

Colori e filtri

BandaLunghezza d'ondaTelescopio
Ultravioletto
UII
385 nmVery Large Telescope
UVES