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Searching for Faint Planetary Nebulae Using the Digital Sky Survey

Published online by Cambridge University Press:  02 January 2013

George H. Jacoby ,
Matthias Kronberger ,
Dana Patchick ,
Philipp Teutsch ,
Jaakko Saloranta ,
Michael Howell ,
Richard Crisp ,
Dave Riddle ,
Agnès Acker  and
David J. Frew
...Show all authors
George H. Jacoby*
Affiliation:
WIYN Observatory, 950 North Cherry Ave, Tucson, AZ 85719, USA
Matthias Kronberger
Affiliation:
Deepskyhunters Collaboration
Dana Patchick
Affiliation:
Deepskyhunters Collaboration
Philipp Teutsch
Affiliation:
Deepskyhunters Collaboration Institut für Astrophysik, Leopold-Franzens-Universität Innsbruck, Austria
Jaakko Saloranta
Affiliation:
Deepskyhunters Collaboration
Michael Howell
Affiliation:
Deepskyhunters Collaboration
Richard Crisp
Affiliation:
Deepskyhunters Collaboration
Dave Riddle
Affiliation:
Deepskyhunters Collaboration
Agnès Acker
Affiliation:
Observatoire Astronomique, Université de Strasbourg, 67000 Strasbourg, France
David J. Frew
Affiliation:
Department of Physics, Macquarie University, Sydney, NSW 2109 Perth Observatory, 337 Walnut Rd, Bickley, WA 6076
Quentin A. Parker
Affiliation:
Department of Physics, Macquarie University, Sydney, NSW 2109 Anglo-Australian Observatory, PO Box 296, Epping, NSW 1710
*
HCorresponding author. Email: jacoby@noao.edu
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Abstract

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Recent Hα surveys such as SHS and IPHAS have improved the completeness of the Galactic planetary nebula (PN) census. We now know of ∼3000 PNe in the Galaxy, but this is far short of most estimates, typically ~25 000 or more for the total population. The size of the Galactic PN population is required to derive an accurate estimate of the chemical enrichment rates of nitrogen, carbon, and helium. In addition, a high PN count (>20 000) is strong evidence that most main-sequence stars of mass 1–8 M⊙ will go through a PN phase, while a low count (<10 000) argues that special conditions (e.g. close binary interactions) are required to form a PN. We describe a technique for finding hundreds more PNe using the existing data collections of the digital sky surveys, thereby improving the census of Galactic PNe.

Keywords

binaries: generalGalaxy: stellar contentplanetary nebulae: generaltechniques: miscellaneous
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 27 , Issue 2 , 2010 , pp. 156 - 165
Copyright
Copyright © Astronomical Society of Australia 2010

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