HST imaging of the two most distant radio galaxies

Details HST imaging of the two most distant radio galaxies HST imaging of the two most distant radio galaxies

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996hst..prop.6576l&link_type=abstract

HST Proposal ID #6576

Computer Science

Hst Proposal Id #6576 Agn

Scientific paper

The recent discovery of two radio galaxies at z>4, 8C1435+635 {z=4.25} and 6C0140+326 {z=4.41} has allowed us to investigate spatially resolved objects within the first Gyr of the lifetime of a closed Universe. We require high-resolution imaging of these objects with the HST in LyAlpha and continuum. In conjuction with ground based data, HST images will allow us to study the neutral gas and dust content of these galaxies, and constrain the UV emission mechanism and the LyAlpha ionisation mechanism. In the case of 6C0140+326, LyAlpha falls within the narrow-band F658N filter, facilitating a deep narrow-band search of the field for companion galaxies. Such a search will be highly sensitive to small scale-size sub-units of star-forming gas which will later merge into more massive galaxies. A candidate emission- line object has already been found using ground-based observations; this can be observed at the same pointing as the radio galaxy itself.

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