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- Title
- The Optical emission nebulae in the vicinity of WR 48 (Θ Mus) : true Wolf–Rayet ejecta or unconnected supernova remnant?
- Related
- Monthly notices of the Royal Astronomical Society, Vol. 401, No. 2 (2010), p.1760-1771
- DOI
- 10.1111/j.1365-2966.2009.15814.x
- Publisher
- Wiley-Blackwell
- Date
- 2010
- Author/Creator
- Stupar, M
- Author/Creator
- Parker, Q. A
- Author/Creator
- Filipovic, M. D
- Description
- During searches for new optical Galactic supernova remnants (SNRs) in the high-resolution, high-sensitivity Anglo-Australian Observatory/United Kingdom Schmidt Telescope Hα survey of the southern Galactic plane, we uncovered a variety of filamentary and more diffuse, extensive nebular structures in the vicinity of Wolf–Rayet (WR) star 48 (Θ Muscae), only some of which were previously recognized. We used the double-beam spectrograph of the Mount Stromlo and Siding Spring Observatory 2.3-m to obtain low- and mid-resolution spectra of selected new filaments and structures in this region. Despite spectral similarities between the optical spectra of WR star shells and SNRs, a careful assessment of the new spectral and morphological evidence from our deep Hα imagery suggests that the putative shell of Θ Mus is not a WR shell at all, as has been commonly accepted, but is rather part of a more complex area of large-scale overlapping nebulosities in the general field of the WR star. The emission comprises a possible new optical SNR and a likely series of complex H ii regions. Finally, we present the intriguing detection of apparent collimated, directly opposing, ionized outflows close to Θ Mus itself which appears unique among such stars.
- Description
- 12 page(s)
- Subject Keyword
- 020100 Astronomical and Space Sciences
- Subject Keyword
- stars: individual: WR 48, HD 113904
- Subject Keyword
- Theta (Θ) Muscae
- Subject Keyword
- stars: winds, outflows
- Subject Keyword
- stars: Wolf–Rayet
- Subject Keyword
- H ii regions
- Subject Keyword
- ISM: individual: G304.4−3.1
- Subject Keyword
- supernova remnants
- Resource Type
- journal article
- Organisation
- Macquarie University. Dept. of Physics and Astronomy
- Identifier
- http://hdl.handle.net/1959.14/116327
- Identifier
- ISSN:0035-8711
- Identifier
- mq-rm-2010002035
- Language
- eng
- Rights
- Completed. 5/4/11 wy
- Reviewed
Macquarie University ResearchOnline
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