Lithium in giant Star 850 in stellar cluster Be21

FEROS obtained two spectra (each of 90 min exposure) of S50, both showing this strong Lithium line and thus proving that it cannot have been caused by an instrumental effect. These spectra also illustrate the great amount of information that may be obtained in each exposure with FEROS - the shown spectral interval is just 1/280 of the total range recorded. The (visual) magnitude of S50 is 15.6, i.e., about 7,000 times fainter than what can be seen with the unaided eye.

Crediti:

ESO

A proposito dell'immagine

Identificazione:eso9905b
Tipo:Grafico
Data di pubblicazione:02 Febbraio 1999
Notizie relative:eso9905
Dimensione:2936 x 3008 px

A proposito delll'oggetto

Nome:s50, Spectrum
Tipo:Milky Way : Star
Categoria:Stars

Formati delle immagini

JPEG grande
867,2 KB

Colori e filtri

BandaTelescopio
Ottico
R
ESO 1.52-metre telescope
FEROS

Exposure time: 5400s