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.
Källa:ESO/R.-D.Scholz et al. (AIP)
Om bilden
ID: | eso0303b |
Typ: | Observation |
Publiceringsdatum: | 13 januari 2003 |
Relaterade pressmeddelanden: | eso0303 |
Storlek: | 2200 x 1574 px |
Om objektet
Namn: | Epsilon Indi B |
Typ: | Milky Way : Star : Type : Brown Dwarf |
Kategori: | Stars |
Färger och filter
Band | Teleskop |
---|---|
Infrarött Near-IR | New Technology Telescope SOFI |