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.
Créditos:ESO/R.-D.Scholz et al. (AIP)
Sobre a imagem
Id: | eso0303b |
Tipo: | Observação |
Data de divulgação: | 13 de Janeiro de 2003 |
Notícias relacionadas: | eso0303 |
Tamanho: | 2200 x 1574 px |
Sobre o objeto
Nome: | Epsilon Indi B |
Tipo: | Milky Way : Star : Type : Brown Dwarf |
Categoria: | Stars |
Cores e filtros
Banda | Telescópio |
---|---|
Infravermelho Near-IR | New Technology Telescope SOFI |