Searching for the most distant objects ever detected
DAZLE is an instrument under development by the Anglo-Australian Observatory and the Institute of Astronomy (Cambridge) with the singular aim of detecting galaxies within a narrow redshift band, more distant than any objects yet observed.
DAZLE will do this by looking only at a very narrow wavelength band,
seeking Lyman alpha emission from very distant galaxies. The
ultra-violet Lyman alpha line is expected to be the brightest emission
line of these galaxies, but will be observed in the infrared region of
the spectrum because of the large redshift (z ~ 8). The redshift value
is carefully chosen to place the detected wavelength in a very dark
atmospheric 'window', clear of atmospheric emission that would obscure
the light to broadband instruments.
The plan is to use the camera from the IoA CIRPASS instrument, mounting it to one of ESO's four VLT telescopes in Chile with narrowband filters to isolate the wavelength of interest.
AAO design of the instrument structure was completed in September of 2003, and DAZLE is presently being constructed at Cambridge by the IoA.
Originally created by
on January 25, 2002