Near-infrared spectrum of Epsilon Indi B

Near-infrared (0.9-2.5 µm) spectrum of Epsilon Indi B, obtained on November 16-17, 2002, with the SOFI multi-mode instrument on the ESO 3.5-m New Technology Telescope (NTT) at the La Silla Observatory (Chile) The total integration time is 360 sec. Regions of strong absorption in the Earth's atmosphere have been removed for clarity. The locations of prominent molecular absorption bands from water (H2O), methane (CH4) and carbon monoxide (CO) in the atmosphere of Epsilon Indi B are indicated. Also labelled are some spectral lines from potassium (KI, at 1.25 and 1.52 µm) and sodium (NaI, at 2.33 µm) atoms. From these data, the spectral type of Epsilon Indi B is determined as T2.5V, corresponding to an effective temperature of 'just' 1000 ± 60 °C.

Kredit:

ESO/R.-D.Scholz et al. (AIP)

O snímku

Id:eso0303b
Typ:Pozorování
Datum zveřejnění:13. ledna 2003
Související články:eso0303
Velikost:2200 x 1574 px

O objektu

Jméno:Epsilon Indi B
Typ:Milky Way : Star : Type : Brown Dwarf
Kategorie:Stars

Image Formats

největší JPEG
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Barvy & filtry

PásmoDalekohled
Infračervený
Near-IR
New Technology Telescope
SOFI