The Planetary nebula Abell 48 and its [WN4] central star

I. S. Bojičić, D. J. Frew, Q. A. Parker, M. Stupar, S. Wachter, K. DePew

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


    We have conducted a multi-wavelength study of the planetary nebula Abell 48 and give a revised classification of its nucleus as a hydrogen-deficient star of type [WN4]. The surrounding nebula has a morphology typical of PNe and importantly, is not enriched in nitrogen, and thus not the 'peeled atmosphere' of a massive star. Indeed, no WN4 star is known to be surrounded by such a compact nebula. The ionized mass of the nebula is also a powerful discriminant between the low-mass PN and high-mass WR ejecta interpretations. The ionized mass would be impossibly high if a distance corresponding to a Pop I star was adopted, but at a distance of 2 kpc, the mass is quite typical of moderately evolved PNe. At this distance, the ionizing star then has a luminosity of ~5000 L⊙, again rather typical for a PN central star. We give a brief discussion of the implications of this discovery for the late-stage evolution of intermediate-mass stars.
    Original languageEnglish
    Title of host publication18th European White Dwarf Workshop
    Subtitle of host publicationproceedings of a conference held at the Pedagogical University of Cracow, Poland, 13-17 August 2012
    EditorsJ Krzesínski, G Stachowski, P Moskalik, K Bajan
    Place of PublicationSan Francisco
    PublisherAstronomical Society of the Pacific
    Number of pages4
    ISBN (Print)9781583818206
    Publication statusPublished - 2013
    EventEuropean White Dwarf Workshop (18th : 2012) - Krakow, Poland
    Duration: 13 Aug 201217 Aug 2012

    Publication series

    NameAstronomical Society of the Pacific conference series
    PublisherAstronomical Society of the Pacific


    WorkshopEuropean White Dwarf Workshop (18th : 2012)
    CityKrakow, Poland


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