Article (Scientific journals)
VLT observations of the highly ionized nebula around Brey2
Nazé, Yaël; Rauw, Grégor; Manfroid, Jean et al.
2003In Astronomy and Astrophysics, 401 (2), p. 13-L16
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Keywords :
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.
Disciplines :
Earth sciences & physical geography
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
Language :
English
Title :
VLT observations of the highly ionized nebula around Brey2
Publication date :
April 2003
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
E D P Sciences, Les Ulis Cedexa, France
Volume :
401
Issue :
2
Pages :
L13-L16
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
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