Planetary Nebulae in the Large Magellanic Cloud: Results from MCELS

Details Planetary Nebulae in the Large Magellanic Cloud: Results from MCELS Planetary Nebulae in the Large Magellanic Cloud: Results from MCELS

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20915604z&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #156.04; Bulletin of the American Astronomical Society,

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As the ejected atmospheres of more common low to intermediate mass stars, planetary nebulae (PNe) represent an important constituent of the interstellar medium (ISM), reflecting the evolutionary histories of the progenitor giant stars and chemically-enriching the ambient ISM. Large samples of PNe are required for the study of general characteristics and evolutionary trends, especially when trying to determine the breakdown of PNe in terms of excitation class, chemical abundances, and other properties. The Galactic PN sample suffers from incompleteness due to interstellar absorption along the line-of-sight and uncertain distance measurements. The Large Magellanic Cloud (LMC), with its low foreground absorption and relative proximity, offers an ideal laboratory to investigate the physical properties of a large sample of PNe. In this work, we present a flux-calibrated set of planetary nebulae (PNe) candidates over the central 8x8 degrees of the LMC using data from the Magellanic Cloud Emission Line Survey (MCELS). With our data pipeline, we subtract continuum images from the emission-line images ([O III], H-alpha, and [S II]) to obtain accurate measurements of the emission-line intensities without significant contamination by the background stellar continuum. Furthermore, our continuum-subtracted data allow us to map out deeper detail in the faint, diffuse emission, improving our selection process and identification of PNe candidates. We compare our results with those from previous surveys.

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