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Ultraviolet emission line imaging of planetary nebulae with GALEX

Published online by Cambridge University Press:  30 August 2012

Luciana Bianchi ,
Arturo Manchado  and
Karl Forster
Luciana Bianchi
Affiliation:
Johns Hopkins University, Dept. of Physics and Astronomy 3400 N. Charles St. Baltimore, MD 21218, USA email: bianchi@pha.jhu.edu
Arturo Manchado
Affiliation:
Instituto de Astrofísica de Canarias, Tenerife, Spain
Karl Forster
Affiliation:
California Institute of Technology, Pasadena, USA
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Abstract

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GALEX (the Galaxy Evolution Explorer) has provided far-UV(1344-1786Å) and near-UV(1771-2831Å) imaging of several Planetary Nebulae (e.g., Bianchi et al. 2008, Bianchi 2012), with flux limits ~27.5 mag/sq.arcsec for objects in the Medium-deph Imaging Survey (MIS). PNe images in the GALEX broad-band UV filters include flux from both nebular line and continuum emission. We use the GALEX grism observing mode to obtain slitless spectral imaging of a sample of PNe with diameters >1′, in the near-UV. We show the first data from this program. The grism produces 2D images of the prominent UV nebular emission lines, when such lines dominate the flux. Combined with monochromatic images of diagnostic lines in the optical domain, such data help detect and interpret ionization and shock fronts, especially in faint nebular regions.

Keywords

atlasesplanetary nebulae: generalultraviolet: ISMultraviolet: starsstars: AGB and post-AGB
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S283: Planetary Nebulae: An Eye to the Future , July 2011 , pp. 308 - 309
Copyright
Copyright © International Astronomical Union 2012

References

Bianchi, L., 2012, these proceedings Google Scholar
Bianchi, L. & Herald, J. 2008, in Gomez de Castro, A. I. & Brosh, N. (eds.), Space Astronomy: The UV Window to the Universe (Springer)Google Scholar