A dataset provided by the European Space Agency

Name 53W002
Title STELLAR POPULATIONS IN A CLUSTER OF GALAXIES AT Z=2.4
URL

http://nida.esac.esa.int/nida-sl-tap/data?RETRIEVAL_TYPE=OBSERVATION&PRODUCT_LEVEL=ALL&obsno=521007050
DOI https://doi.org/10.5270/esa-xzjfskw
Author KEEL, WILLIAM C
Description we have found a cluster of galaxies at redshift z=2.4, identified via lyman alpha emission in narrow-band hst images. this cluster offers a special opportunity to determine the time of first widespread star formation in normal galaxies, since most of the members will not be contaminated by significant agn emission as judged from the optical sizes and colors. we propose isocam mapping of the cluster in the lw2 band, which corresponds to emitted k-band radiation. the spectral energy distributions from 0.4-8 microns will provide sensitive limits or measurements of the age of the current bursts of star formation, and detection of any substantial pre-existing stellar population. because we are already seeing this cluster at a substantial lookback time, even a crude measure of the ages of the stellar populations gives a sensitive determination of when they first formed significant numbers of stars, which is a crucial parameter in understanding galaxy evolution. furthermore, the hst data in this field reach limits only 1.0 mag brighter than in the hubble deep field, so that these data can be used as an independent check on the representative nature of the hdf counts extending into the iso bands. the target visibility in this region is superb (practically every orbit in the extended mission), so that this field is an important adjunct in deep survey studies as well as the immediate cluster/protogalaxy science we propose.
Instrument CAM01
Temporal Coverage 1997-03-30T17:06:47Z/1997-04-20T16:52:36Z
Version 1.0
Mission Description The Infrared Space Observatory (ISO) was the worlds 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.
Creator Contact https://support.cosmos.esa.int/iso/
Date Published 1999-06-04T00:00:00Z
Last Update 2026-03-02
Keywords Infrared Space Observatory data, ESA ISO mission dataset, ISO infrared observations, mid-infrared astronomy data, far-infrared spectroscopy dataset, ISOCAM imaging data, ISOPHOT photometry data, SWS short wavelength spectrometer data, LWS long wavelength spectrometer data, infrared spectral line observations, infrared imaging survey data, dust emission infrared observations, star formation infrared dataset, interstellar medium spectroscopy data, polycyclic aromatic hydrocarbons PAH features data, active galactic nuclei infrared observations, circumstellar envelope infrared data, planetary nebula infrared spectroscopy, extragalactic infrared survey data, calibrated ISO data products, FITS files infrared astronomy, spectral energy distribution infrared data, continuum photometry dataset, infrared spectral cubes, flux-calibrated infrared maps, ESA ISO Data Archive, legacy infrared space mission dataset
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, KEEL et al., 1999, 'STELLAR POPULATIONS IN A CLUSTER OF GALAXIES AT Z=2.4', 1.0, European Space Agency, https://doi.org/10.5270/esa-xzjfskw