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File:The spectrum of the brown dwarf KELU-1 (eso9709b).jpg

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The_spectrum_of_the_brown_dwarf_KELU-1_(eso9709b).jpg (559 × 526 pixels, file size: 89 KB, MIME type: image/jpeg)

Summary

Description
English: This photo shows the spectrum of the newly found Brown Dwarf object, KELU-1, obtained with the EFOSC1 multimode instrument at the ESO 3.6-m telescope.

A comparison with the spectrum in the visual to near-infrared region (4000 - 10000 A, i.e. 400 - 1000 nm) with that of a normal, cool dwarf star of spectral type dM6e shows significant differences. In particular, it does not display the bands of titanium oxide which are seen in the dwarf star.

The insert shows the visual part of the spectrum (4000 - 7000 A) enlarged. The bands of CaOH and neutral sodium (Na) are seen, and also an absorption line of neutral lithium. There is a weak H-alpha emission line from neutral hydrogen. This is the first blue spectrum ever obtained of a Brown Dwarf object.

This tracing is based on two 30-min spectral exposures in the visual region and two 20-min exposures in the near-infrared region. The other spectrum is of another high-proper-motion object identified during the Calan-ESO proper-motion survey carried out with the ESO 1-m Schmidt telescope and herewith classified as of the dwarf M-type.
Date 28 April 1997 (upload date)
Source
This media was produced by the European Southern Observatory (ESO), under the identifier eso9709b

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Author ESO
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Captions

This photo shows the spectrum of the newly found Brown Dwarf object, KELU-1, obtained with the EFOSC1 multimode instrument at the ESO 3.6-m telescope. A comparison with the spectrum in the visual to near-infrared region (4000 - 10000 A, i.e.

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526 pixel

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559 pixel

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242d5ec8ae1f6f3613a84af723cfd7cf465085ec

determination method or standard: SHA-1

inception

28 April 1997

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current18:34, 24 June 2024Thumbnail for version as of 18:34, 24 June 2024559 × 526 (89 KB)OptimusPrimeBot#Spacemedia - Upload of https://www.eso.org/public/archives/images/large/eso9709b.jpg via Commons:Spacemedia

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