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The first MACHO spectrum
Composite spectrum of the two very close objects seen on the HST image (ESO Press Photo eso0140). It is based on four 1500-second exposures that were obtained with the FORS2 multi-mode instrument at the 8.2-m VLT KUEYEN telescope on February 2, 2001. The presence of certain metal and alkali resonance lines, in particular of sodium (Na), is typical of a cool stellar object. Telluric molecular bands (from the Earth's atmosphere) are indicated with an earth-symbol.
Credit:ESO
Over de afbeelding
Id: | eso0140b |
Type: | Observatie |
Publicatiedatum: | 5 december 2001 |
Gerelateerde berichten: | eso0140 |
Grootte: | 1003 x 682 px |
Over het object
Naam: | Hubble Space Telescope, MACHO, Spectrum, Very Large Telescope |
Type: | Early Universe : Cosmology : Phenomenon : Dark Matter Milky Way : Cosmology : Phenomenon : Lensing |
Categorie: | Cosmology Illustrations |
Kleuren & filters
Band | Golflengte | Telescoop |
---|---|---|
Infrarood I | 800 nm | Very Large Telescope FORS2 |