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Article: The optical emission nebulae in the vicinity of WR 48 (Θ Mus): True Wolf-Rayet ejecta or unconnected supernova remnant?

TitleThe optical emission nebulae in the vicinity of WR 48 (Θ Mus): True Wolf-Rayet ejecta or unconnected supernova remnant?
Authors
KeywordsStars: winds, outflows
Stars: individual: WR 48, HD 113904, Theta (Θ) Muscae
Supernova remnants
ISM: individual: G304.4-3.1
H ii regions
Stars: Wolf-Rayet
Issue Date2010
Citation
Monthly Notices of the Royal Astronomical Society, 2010, v. 401, n. 3, p. 1760-1769 How to Cite?
AbstractDuring 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. © 2009 RAS.
Persistent Identifierhttp://hdl.handle.net/10722/208901
ISSN
2015 Impact Factor: 4.952
2015 SCImago Journal Rankings: 2.806

 

DC FieldValueLanguage
dc.contributor.authorStupar, Milorad-
dc.contributor.authorParker, Quentin A.-
dc.contributor.authorFilipovíc, Miroslav D.-
dc.date.accessioned2015-03-23T02:02:08Z-
dc.date.available2015-03-23T02:02:08Z-
dc.date.issued2010-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, 2010, v. 401, n. 3, p. 1760-1769-
dc.identifier.issn0035-8711-
dc.identifier.urihttp://hdl.handle.net/10722/208901-
dc.description.abstractDuring 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. © 2009 RAS.-
dc.languageeng-
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society-
dc.subjectStars: winds, outflows-
dc.subjectStars: individual: WR 48, HD 113904, Theta (Θ) Muscae-
dc.subjectSupernova remnants-
dc.subjectISM: individual: G304.4-3.1-
dc.subjectH ii regions-
dc.subjectStars: Wolf-Rayet-
dc.titleThe optical emission nebulae in the vicinity of WR 48 (Θ Mus): True Wolf-Rayet ejecta or unconnected supernova remnant?-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1111/j.1365-2966.2009.15814.x-
dc.identifier.scopuseid_2-s2.0-73949123169-
dc.identifier.volume401-
dc.identifier.issue3-
dc.identifier.spage1760-
dc.identifier.epage1769-
dc.identifier.eissn1365-2966-

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