SAINTS: Star Formation and the ISM in Nearby Tidal Streams

Details SAINTS: Star Formation and the ISM in Nearby Tidal Streams SAINTS: Star Formation and the ISM in Nearby Tidal Streams

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sptz.prop50689s&link_type=abstract

Spitzer Proposal ID #50689

Computer Science

Scientific paper

We propose to obtain high quality mid-infrared spectra of a sample of nearby tidal dwarf galaxies and tidal streams. At the present time, the properties of the interstellar matter in tidal features are not well-known. We will determine the strengths of the PAH features relative to the dust continuum, the hardness of the ISRF from the [Ne III]/[Ne II] and [S IV]/[S III] line ratios, the quantity of warm molecular gas from the H2 lines, as well as the neon and sulfur abundances. We will compare these quantities to those of normal dwarf and spiral galaxies. We have already acquired considerable data for most of our sample, including Spitzer broadband images, GALEX UV images, optical images, and HI maps. Tidal features may contribute significantly to the intergalactic medium, and some may evolve into independent galaxies. Since interactions are more common at high redshift, studying nearby examples are important for interpreting the results of high redshift surveys.

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