Are the damped Lyman-Alpha systems at z>3 really spiral galaxies?

Details Are the damped Lyman-Alpha systems at z>3 really spiral galaxies? Are the damped Lyman-Alpha systems at z>3 really spiral galaxies?

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996hst..prop.6582b&link_type=abstract

HST Proposal ID #6582

Computer Science

Hst Proposal Id #6582 Cosmology

Scientific paper

We still do not know well the sizes of the damped Lyman-Alpha systems or their star formation rates. Here we propose to apply a new technique to image continuum emission from two damped Lyman-Alpha systems, z_abs=3.40 & 3.89, seen in the spectrum of the quasar PC 0953+4749 {z_em=4.46}. Continuum emission from these absorbers, uncontaminated by light from the background quasar, is observable at wavelengths shorter than the Lyman limit of a third damped Lyman-Alpha system at z_ abs=4.25. Deep ground-based images are being used to identify the absorbers. The HST images will provide the morphologies of the damped systems. Recent theories suggest that galaxies at high redshift, z>3, are composed of a number of very compact sub-units, that merge at lower redshift. Existing deep HST images in two fields lend support to this view. The imaging proposed here will provide an additional test of this picture, and will clarify the role the damped systems play in the formation of galaxies.

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