Image of a MACHO

This image is based on three exposures from the WFPC2 camera at the NASA/ESA Hubble Space Telescope, obtained in the V-, R- and I-bands (shown as blue, green and red, respectively). It shows the first image of a Dark Matter object — a MACHO (a massive compact object). It is the red object that is indicated with an arrow and very near to the upper left (at 2 o''clock) of a blue background star. This MACHO is a nearby red dwarf star that gravitationally focused light from the blue background star in another galaxy in a so-called microlensing event. Since the event six years ago, the MACHO has moved 0.134 arcseconds on the sky and can now be clearly separated in the Hubble image.

Crediti:

ESO

A proposito dell'immagine

Identificazione:eso0140a
Tipo:Osservazione
Data di pubblicazione:05 Dicembre 2001
Notizie relative:eso0140
Dimensione:793 x 637 px

A proposito delll'oggetto

Nome:MACHO
Tipo:Milky Way : Cosmology : Phenomenon : Dark Matter
Milky Way : Cosmology : Phenomenon : Lensing
Categoria:Cosmology

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Colori e filtri

BandaTelescopio
Ottico
B
Hubble Space Telescope
WFPC2
Ottico
V
Hubble Space Telescope
WFPC2
Infrarosso
I
Hubble Space Telescope
WFPC2