we propose to use iso to identify high redshift (z>1) galaxies from the iras faint source survey. the strong signature of the redshift in changing the far infrared spectrum towards peaking at longer wavelengths makes iso multiwavelength photometry a powerful tool for identifying high redshift galaxies. the discovery of iras f10214+4724 at z = 2.23, with a bolometric luminosity of 5e14 solar luminosities, has been enermously stimulating for submillimetre continuum and molecular line astronomy, offering the prospect of studying galaxies close to their moment of formation. however it has proved extremely difficult to find other galaxies of this type in the iras catalogues. we have followed up the iras fss 60 mu sources in two areas of the northern hemisphere each 700 sq deg in area, a total sample of over 2800 iras galaxies. for the first area (fss1) we have identified and obtained redshifts for all but 53 of the 1400 sources in the area and for most of these 53 unidentified sources we have obtained vla maps, and where necessary ccd images. most have either very faint identifications on the sky survey plates or ccd frames or are blank, and are thus likely to have z > 0.2 and hence 60 mu luminosities > 1.e12 solar luminosities. for the second area (fss2) the identifications are 90% complete and we have selected 71 objects which are the best candidates for having faint, high redshift idenstifications. the purpose of the iso observations is (1) to confirm the reality of the iras fss source, (2) to measure the sed of this interesting sample, the bulk of which will be ultraluminous galaxies, (3) to identify high redshift galaxies from their sed for further intensive study with large ground-based telescopes.
Instrument
CAM01 , PHT22
Temporal Coverage
1996-08-06T23:34:53Z/1996-12-14T21:34:23Z
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.
European Space Agency, 1999, Photometric Identification Of High Redshift Objects From Iras Fss Blank Fields, 1.0, European Space Agency, https://doi.org/10.5270/esa-j9ty7my
