Mathematics – Logic
Scientific paper
Jul 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8297l&link_type=abstract
HST Proposal ID #8297
Mathematics
Logic
Hst Proposal Id #8297 Interstellar And Intergalactic Matter
Scientific paper
We propose STIS echelle M mode spectroscopy from 1200 Angstrom to 3000 Angstrom of the nearby starburst galaxy NGC1705. Our selected sightline towards the super star cluster NGC1705-1 probes the physical conditions in the starburst- driven galactic superwind. The resolution of ~10 kms is a factor-of-30 improvement over existing HST data and allows a study of the complex outflow kinematics. Multiple supershells are expected to be resolved. Together with FUSE data, the proposed observations will constrain the energetics of the cold and hot gas and help determine if the outflow material can escape from the galaxy. Several weak lines will be measured at sufficiently high S/N to derive column densities and abundances. Previous suggestions of an Alpha-element/Fe enhancement will be verified or rejected using weak Si II, S II, Cr II and Zn II lines. Dust depletion in the outflow will be studied with Fe II lines. No other starburst-driven outflow can be observed with STIS at even remotely similar resolution and S /N. The chosen sightline will allow us to generalize our results to the overall properties of the galaxy outflow, to search for implications for similar galaxies at cosmological distances, and to add to our understanding of QSO absorption lines. We will reduce the proprietary period to six months to allow the community rapid access to these template spectra.
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