Other
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21725609m&link_type=abstract
American Astronomical Society, AAS Meeting #217, #256.09; Bulletin of the American Astronomical Society, Vol. 43, 2011
Other
Scientific paper
There are many planetary nebulae known in our own galaxy, but the vast majority are located close to the plane. However studies of M31 show thousands of PN in its thick disk and halo, so we surmise that there are more halo PN to be discovered for the MWG. Halo PN are important for studying the chemical evolution of the MWG, since they reflect the composition of the galaxy when the first generation of stars formed. We have been searching for PN within the galactic halo, and have found three new PN that may be classified as "halo" PN. We have also discovered nine other new PN within the thick disk and plane of the galaxy. Candidates for our spectral observations were chosen through a multi-step process. First, colors within SDSS and 2MASS were compared to find initial targets, which were then followed up with imaging in g' and [OIII] filters to pick out [OIII] bright candidates. Apache Point Observatory DIS spectroscopy of our candidates has resulted in indentification of tweleve likely new PN, based on the observed emission lines, and ratios of these lines. We present spectra and images of some for these targets.
Balick Bruce
Gomez Teresa
Kwitter Karen
Lutz Jack
McKeever Jean
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