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Article: A search for new emission nebulae from the SHASSA and VTSS surveys

TitleA search for new emission nebulae from the SHASSA and VTSS surveys
Authors
KeywordsISM: HII regions
ISM: planetary nebulae: general
Issue Date2006
Citation
Proceedings of the International Astronomical Union, 2006, v. 2, n. 234, p. 395-396 How to Cite?
AbstractAs an adjunct to the planetary nebula (PN) search from the AAO/UKST Ha survey, a visual search was conducted for new emission nebulae from the SHASSA and VTSS surveys, outside a Galactic latitude of \b| = 10°. Fifteen new objects were found from SHASSA and three from the available fields of VTSS. With one exception, all objects are >5′ across, as smaller nebulae are confused with large numbers of artifacts and compact emitters on these surveys. All previously known PNe larger than this size in the search area, as well as Hewett 1, PG 0108, and PG 0109 were recovered in this blind search. Candidates were selected as discrete, morphologically symmetric Ha enhancements, to differentiate them from the ubiquitous diffuse emission structure of the ISM. These criteria were relaxed for the VTSS survey due to its poorer inherent resolution. Most of the new discoveries are probable Stromgren spheres in the ISM. Some show unusual line ratios (e.g. strong [O III] or [N II] emission) based on slit spectroscopy and WHAM data (see Madsen et al. 2006, this volume), suggesting these are ionised by a hot subdwarf or white dwarf star, and may be possible PNe. Our most interesting discovery is a rare bowshock nebula around a bright, previously unnoticed, nova-like cataclysmic variable. © 2006 International Astronomical Union.
Persistent Identifierhttp://hdl.handle.net/10722/208871
ISSN
2015 SCImago Journal Rankings: 0.105

 

DC FieldValueLanguage
dc.contributor.authorFrew, David J.-
dc.contributor.authorMadsen, Gregory J.-
dc.contributor.authorParker, Quentin A.-
dc.date.accessioned2015-03-23T02:02:01Z-
dc.date.available2015-03-23T02:02:01Z-
dc.date.issued2006-
dc.identifier.citationProceedings of the International Astronomical Union, 2006, v. 2, n. 234, p. 395-396-
dc.identifier.issn1743-9213-
dc.identifier.urihttp://hdl.handle.net/10722/208871-
dc.description.abstractAs an adjunct to the planetary nebula (PN) search from the AAO/UKST Ha survey, a visual search was conducted for new emission nebulae from the SHASSA and VTSS surveys, outside a Galactic latitude of \b| = 10°. Fifteen new objects were found from SHASSA and three from the available fields of VTSS. With one exception, all objects are >5′ across, as smaller nebulae are confused with large numbers of artifacts and compact emitters on these surveys. All previously known PNe larger than this size in the search area, as well as Hewett 1, PG 0108, and PG 0109 were recovered in this blind search. Candidates were selected as discrete, morphologically symmetric Ha enhancements, to differentiate them from the ubiquitous diffuse emission structure of the ISM. These criteria were relaxed for the VTSS survey due to its poorer inherent resolution. Most of the new discoveries are probable Stromgren spheres in the ISM. Some show unusual line ratios (e.g. strong [O III] or [N II] emission) based on slit spectroscopy and WHAM data (see Madsen et al. 2006, this volume), suggesting these are ionised by a hot subdwarf or white dwarf star, and may be possible PNe. Our most interesting discovery is a rare bowshock nebula around a bright, previously unnoticed, nova-like cataclysmic variable. © 2006 International Astronomical Union.-
dc.languageeng-
dc.relation.ispartofProceedings of the International Astronomical Union-
dc.subjectISM: HII regions-
dc.subjectISM: planetary nebulae: general-
dc.titleA search for new emission nebulae from the SHASSA and VTSS surveys-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1017/S1743921306003413-
dc.identifier.scopuseid_2-s2.0-33845546371-
dc.identifier.volume2-
dc.identifier.issue234-
dc.identifier.spage395-
dc.identifier.epage396-
dc.identifier.eissn1743-9221-

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