during the last year a new population of galaxies at high redshift (z=2.5-3.5) has been identified which may represent the long sought-after population of protogalaxies -- the progenitors of normal galaxies like the milky way, observed in their initial episode of star-formation. we propose to use iso to study the spectral energy distribution of ms1512-cb58 at z=2.72, which is by far the brightest example in its class -- 3 magnitudes brighter than any other known high redshift protogalaxy candidate. we will combine isocam lw2 and lw3 photometry, and lws1 low resolution spectroscopy from 43-197 microns, with a large body of ground-based spectrophotometry and hst photometry to measure the current star-formation rate, reddening, star-formation history, and dust mass in cb58. the observed mid-ir measured with isocam corresponds to the rest frame h and k band, and so will place important constraints upon the presence of any old population of stars. the far-ir spectral energy distribution obtained with the lws will be combined with ground-based sub-millimeter bolometry to estimate the temperature and mass of the dust in this galaxy.
Instrument
CAM01
Temporal Coverage
1997-01-28T08:09:30Z/1997-01-28T10:31:52Z
Version
1.0
Mission Description
The Infrared Space Observatory (ISO) was the world's first true orbiting infrared observatory. Equipped with four highly-sophisticated and versatile scientific instruments, it was launched by Ariane in November 1995 and provided astronomers world-wide with a facility of unprecedented sensitivity and capabilities for a detailed exploration of the Universe at infrared wavelengths.
