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Lyman-alpha forest in QSO HE2217-2818
A tracing of one spectral order, corresponding to one horizontal line in the echelle spectrum. It shows part of the Lyman-alpha forest in the ultraviolet spectrum of the southern quasar QSO HE2217-2818 . The absorption lines are caused by intervening, neutral hydrogen gas located at different distances along the line-of-sight towards this quasar.
Kredit:ESO
O snímku
| Id: | eso9944e |
| Typ: | Mapa |
| Datum zveřejnění: | 5. října 1999 |
| Související články: | eso9944 |
| Velikost: | 3003 x 1540 px |
O objektu
| Jméno: | QSO HE2217-2818, Spectrum |
| Typ: | Early Universe : Galaxy : Activity : AGN : Quasar |
| Vzdálenost: | z=2.4 (rudý posuv) |
| Kategorie: | Quasars and Black Holes |
Barvy & filtry
| Pásmo | Dalekohled |
|---|---|
| Ultrafialový | Very Large Telescope UVES |