@inbook{17768a32a05b4e2b99f8e2c7c350cdc5,
title = "The Planetary nebula Abell 48 and its [WN4] central star",
abstract = "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.",
author = "Boji{\v c}i{\'c}, {I. S.} and Frew, {D. J.} and Parker, {Q. A.} and M. Stupar and S. Wachter and K. DePew",
year = "2013",
language = "English",
isbn = "9781583818206",
series = "Astronomical Society of the Pacific conference series",
publisher = "Astronomical Society of the Pacific",
pages = "309--312",
editor = "J Krzes{\'i}nski and G Stachowski and P Moskalik and K Bajan",
booktitle = "18th European White Dwarf Workshop",
note = "European White Dwarf Workshop (18th : 2012) ; Conference date: 13-08-2012 Through 17-08-2012",
}