Planetary nebulae in the outer disk and halo of M31

Alexei Kniazev*, Eva K. Grebel, Dan Zucker, Eric Bell, Hugh Harris

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

1 Citation (Scopus)


We have developed a method to identify planetary nebula (PN) candidates in imaging data of the Sloan Digital Sky Survey (SDSS). This method exploits the SDSS's five-band sampling of emission lines in PN spectra, which results in a color signature distinct from that of other sources and which can be applied to galaxies where PNe appear as point sources. We tested this method with SDSS data of M31. In areas searched by previous authors, we were able to recover about 6/7 of the previously known PNe. All unrecovered PNe are located in overcrowded fields and were not detected by the standard SDSS pipeline. We then extended this search to the full area of M31's halo and disk sampled by the SDSS.

Original languageEnglish
Title of host publicationPlanetary nebulae beyond the Milky Way
Subtitle of host publicationProceedings of the ESO Workshop held at Garching, Germany, 19-21 May, 2004
EditorsLetizia Stanghellini, Jeremy R. Walsh, Nigel G. Douglas
Place of PublicationHeidelberg
PublisherSpringer, Springer Nature
Number of pages3
ISBN (Electronic)9783540342700
ISBN (Print)3540310118, 9783540310112
Publication statusPublished - 2006
Externally publishedYes
EventPlanetary Nebulae beyond the Milky Way: An ESO Workshop - Garching bei München, Germany
Duration: 19 May 200421 May 2004

Publication series

NameESO astrophysics symposia
ISSN (Print)14312433
ISSN (Electronic)16116143


WorkshopPlanetary Nebulae beyond the Milky Way
CityGarching bei München


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