VLT observations of the highly ionized nebula around Brey2

Nazé, Yaël; Rauw, Grégor; Manfroid, Jean; Chu, Y. H.; Vreux, Jean-Marie

doi:10.1051/0004-6361:20030260

Reference : VLT observations of the highly ionized nebula around Brey2


	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
	To cite this reference:	http://hdl.handle.net/2268/3638

Title :	VLT observations of the highly ionized nebula around Brey2
Language :	English
Author, co-author :	Nazé, Yaël [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe d'astrophysique des hautes énergies (GAPHE) >]
	Rauw, Grégor [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe d'astrophysique des hautes énergies (GAPHE) >]
	Manfroid, Jean [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO) >]
	Chu, Y. H. [> > > >]
	Vreux, Jean-Marie [Université de Liège - ULiège > Département d'astrophysique]
Publication date :	Apr-2003
Journal title :	Astronomy and Astrophysics
Publisher :	E D P Sciences
Volume :	401
Issue/season :	2
Pages :	L13-L16
Peer reviewed :	Yes (verified by ORBi)
Audience :	International
ISSN :	0004-6361
City :	Les Ulis Cedexa
Keywords :	[en] stars : individual : Brey2 ; ISM : bubbles ; ISM : abundances ; ISM : supernova remnants
Abstract :	[en] We present the first high resolution He II lambda4686 images of the high excitation nebula around the WR star Brey2 in the LMC. This nebula presents a striking morphology: a small arc-like feature some 3.6 pc in radius is particularly prominent in the He II lambda4686 line. We further discover a previously unknown faint He II emission that extends over an area of 22 x 17 pc(2). An even fainter He II emission is apparently associated with the interstellar bubble blown by the progenitor of Brey2. The total He II flux corresponds to an ionizing flux of 4 x 10(47) photons s(-1). Halpha, [O III], and He I lambda5876 images and long-slit spectra are also examined in this letter, enabling us to investigate the detailed physical properties at various locations of the nebula.
Permalink :	http://hdl.handle.net/2268/3638
DOI :	10.1051/0004-6361:20030260
Other URL :	http://arxiv.org/abs/astro-ph/0302515

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