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.

Credit:

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

Over de afbeelding

Id:eso0303b
Type:Observatie
Publicatiedatum:13 januari 2003
Gerelateerde berichten:eso0303
Grootte:2200 x 1574 px

Over het object

Naam:Epsilon Indi B
Type:Milky Way : Star : Type : Brown Dwarf
Categorie:Stars

Afbeeldingstypen

Grote JPEG
199,2 KB

Kleuren & filters

BandTelescoop
Infrarood
Near-IR
New Technology Telescope
SOFI