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.

Crediti:

ESO

A proposito dell'immagine

Identificazione:eso0140b
Tipo:Osservazione
Data di pubblicazione:05 Dicembre 2001
Notizie relative:eso0140
Dimensione:1003 x 682 px

A proposito delll'oggetto

Nome:Hubble Space Telescope, MACHO, Spectrum, Very Large Telescope
Tipo:Early Universe : Cosmology : Phenomenon : Dark Matter
Milky Way : Cosmology : Phenomenon : Lensing
Categoria:Cosmology
Illustrations

Formati delle immagini

JPEG grande
82,2 KB

Colori e filtri

BandaLunghezza d'ondaTelescopio
Infrarosso
I
800 nmVery Large Telescope
FORS2