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

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 proceeding › Chapter › peer-review

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.

Original language	English
Title of host publication	18th European White Dwarf Workshop
Subtitle of host publication	proceedings of a conference held at the Pedagogical University of Cracow, Poland, 13-17 August 2012
Editors	J Krzesínski, G Stachowski, P Moskalik, K Bajan
Place of Publication	San Francisco
Publisher	Astronomical Society of the Pacific
Pages	309-312
Number of pages	4
ISBN (Print)	9781583818206
Publication status	Published - 2013
Event	European White Dwarf Workshop (18th : 2012) - Krakow, Poland Duration: 13 Aug 2012 → 17 Aug 2012

Publication series

Name	Astronomical Society of the Pacific conference series
Publisher	Astronomical Society of the Pacific
Volume	469

Workshop

Workshop	European White Dwarf Workshop (18th : 2012)
City	Krakow, Poland
Period	13/08/12 → 17/08/12

Cite this

Bojičić, I. S., Frew, D. J., Parker, Q. A., Stupar, M., Wachter, S., & DePew, K. (2013). The Planetary nebula Abell 48 and its [WN4] central star. In J. Krzesínski, G. Stachowski, P. Moskalik, & K. Bajan (Eds.), 18th European White Dwarf Workshop: proceedings of a conference held at the Pedagogical University of Cracow, Poland, 13-17 August 2012 (pp. 309-312). (Astronomical Society of the Pacific conference series; Vol. 469). Astronomical Society of the Pacific.

Bojičić, I. S. ; Frew, D. J. ; Parker, Q. A. et al. / The Planetary nebula Abell 48 and its [WN4] central star. 18th European White Dwarf Workshop: proceedings of a conference held at the Pedagogical University of Cracow, Poland, 13-17 August 2012. editor / J Krzesínski ; G Stachowski ; P Moskalik ; K Bajan. San Francisco : Astronomical Society of the Pacific, 2013. pp. 309-312 (Astronomical Society of the Pacific conference series).

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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",

}

Bojičić, IS, Frew, DJ, Parker, QA, Stupar, M, Wachter, S & DePew, K 2013, The Planetary nebula Abell 48 and its [WN4] central star. in J Krzesínski, G Stachowski, P Moskalik & K Bajan (eds), 18th European White Dwarf Workshop: proceedings of a conference held at the Pedagogical University of Cracow, Poland, 13-17 August 2012. Astronomical Society of the Pacific conference series, vol. 469, Astronomical Society of the Pacific, San Francisco, pp. 309-312, European White Dwarf Workshop (18th : 2012), Krakow, Poland, 13/08/12.

The Planetary nebula Abell 48 and its [WN4] central star. / Bojičić, I. S.; Frew, D. J.; Parker, Q. A. et al.
18th European White Dwarf Workshop: proceedings of a conference held at the Pedagogical University of Cracow, Poland, 13-17 August 2012. ed. / J Krzesínski; G Stachowski; P Moskalik; K Bajan. San Francisco: Astronomical Society of the Pacific, 2013. p. 309-312 (Astronomical Society of the Pacific conference series; Vol. 469).

Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

TY - CHAP

T1 - The Planetary nebula Abell 48 and its [WN4] central star

AU - Bojičić, I. S.

AU - Frew, D. J.

AU - Parker, Q. A.

AU - Stupar, M.

AU - Wachter, S.

AU - DePew, K.

PY - 2013

Y1 - 2013

N2 - 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.

AB - 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.

M3 - Chapter

SN - 9781583818206

T3 - Astronomical Society of the Pacific conference series

SP - 309

EP - 312

BT - 18th European White Dwarf Workshop

A2 - Krzesínski, J

A2 - Stachowski, G

A2 - Moskalik, P

A2 - Bajan, K

PB - Astronomical Society of the Pacific

CY - San Francisco

T2 - European White Dwarf Workshop (18th : 2012)

Y2 - 13 August 2012 through 17 August 2012

ER -

Bojičić IS, Frew DJ, Parker QA, Stupar M, Wachter S, DePew K. The Planetary nebula Abell 48 and its [WN4] central star. In Krzesínski J, Stachowski G, Moskalik P, Bajan K, editors, 18th European White Dwarf Workshop: proceedings of a conference held at the Pedagogical University of Cracow, Poland, 13-17 August 2012. San Francisco: Astronomical Society of the Pacific. 2013. p. 309-312. (Astronomical Society of the Pacific conference series).

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

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