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.

Crédit:

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

À propos de l'image

Identification:eso0303b
Type:Observation
Date de publication:13 janvier 2003
Communiqués de presse en rapport:eso0303
Taille:2200 x 1574 px

À propos de l'objet

Nom:Epsilon Indi B
Type:Milky Way : Star : Type : Brown Dwarf
Catégorie:Stars

Image Formats

Grand JPEG
199,2 Kio

Couleurs & filtres

DomaineTélescope
Infrarouge
Near-IR
New Technology Telescope
SOFI