VLT observations of the highly ionized nebula around Brey2
Abstract
We present the first high resolution HeII 4686 images of the high excitation nebula around the WR star Brey 2 in the LMC. This nebula presents a striking morphology: a small arc-like feature some 3.6pc in radius is particularly prominent in the HeII 4686 line. We further discover a previously unknown faint HeII emission that extends over an area of 22*17 pc^2. An even fainter HeII emission is apparently associated with the interstellar bubble blown by the progenitor of Brey2. The total HeII flux corresponds to an ionizing flux of 4*10^{47} photons/s. Halpha, [OIII], and HeI 5876 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.
Cite
@article{arxiv.astro-ph/0302515,
title = {VLT observations of the highly ionized nebula around Brey2},
author = {Y. Naze and G. Rauw and J. Manfroid and Y. -H. Chu and J. -M. Vreux},
journal= {arXiv preprint arXiv:astro-ph/0302515},
year = {2011}
}
Comments
4 pages, 3 figures (2 in jpg), accepted by A&A Letters, also available from http://vela.astro.ulg.ac.be/Preprints/P80/index.html