期刊
ASTRONOMY & ASTROPHYSICS
卷 401, 期 2, 页码 L13-L16出版社
E D P SCIENCES
DOI: 10.1051/0004-6361:20030260
关键词
stars : individual : Brey2; ISM : bubbles; ISM : abundances; ISM : supernova remnants
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.
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