The Chemical History of the SMC Derived From Faint Planetary Nebulae

Details The Chemical History of the SMC Derived From Faint Planetary Nebulae The Chemical History of the SMC Derived From Faint Planetary Nebulae

Aug 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000noao.prop...45j&link_type=abstract

NOAO Proposal ID #2000B-0045

Computer Science

Scientific paper

With the requested spectroscopy and imaging, we will be able to define the history of chemical enrichment in the SMC for O, Ne, N, Ar, and S. Using the ESO 2.2-m with its wide-field Mosaic (8K x 8K) imager, we identified 40 new faint planetary nebula (PN) candidates in the central 2.8 sq. deg. of the Small Magellanic Cloud (Jacoby & DeMarco 1999). Previously, 27 bright PNe and 6 faint PNe were known in this region. We wish to confirm the nature of the new candidates and to derive the chemical compositions for a few (~10) of the PNe in order to derive the chemical enrichment history in the SMC for comparison with similar studies in the LMC and M31. In addition, we wish to extend our survey to the outer regions of the SMC to test for spatial variations in PN production rates that may signal population age variations, to test our preliminary result that the PN luminosity function is highly anomalous, to measure any chemical composition gradients, and to enhance the initial determination of the chemical history.

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