File Download
  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Discovery of a Halo around the helix nebula NGC7293 in the wise all-sky survey

TitleDiscovery of a Halo around the helix nebula NGC7293 in the wise all-sky survey
Authors
KeywordsInfrared: ism
Ism: structure
Planetary nebulae: individual: helix nebula (ngc 7293)
Stars: agb and post-agb
Issue Date2012
PublisherInstitute of Physics Publishing, Inc. The Journal's web site is located at http://iopscience.iop.org/0004-637X/
Citation
The Astrophysical Journal, 2012, v. 755 n. 1, article no. 53 How to Cite?
AbstractWe report the discovery of an extended halo (40′ in diameter) around the planetary nebula NGC7293 (the Helix Nebula) observed in the 12 μm band from the Wide-field Infrared Survey Explorer all-sky survey. The mid-infrared halo has an axisymmetric structure with a sharp boundary to the northeast and a more diffuse boundary to the southwest, suggesting an interaction between the stellar wind and the interstellar medium (ISM). The symmetry axis of the halo is well aligned with that of a northeast arc, suggesting that the two structures are physically associated. We have attempted to fit the observed geometry with a model of a moving steady-state stellar wind interacting with the ISM. Possible combinations of the ISM density and the stellar velocity are derived from these fittings. The discrepancies between the model and the observations suggest that the stellar mass loss has a more complicated history, including possible time and angle dependences. © 2012 The American Astronomical Society. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/159788
ISSN
2015 Impact Factor: 5.909
2015 SCImago Journal Rankings: 3.266
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorZhang, Yen_US
dc.contributor.authorHsia, CHen_US
dc.contributor.authorKwok, Sen_US
dc.date.accessioned2012-08-16T05:56:38Z-
dc.date.available2012-08-16T05:56:38Z-
dc.date.issued2012en_US
dc.identifier.citationThe Astrophysical Journal, 2012, v. 755 n. 1, article no. 53en_US
dc.identifier.issn0004-637X-
dc.identifier.urihttp://hdl.handle.net/10722/159788-
dc.description.abstractWe report the discovery of an extended halo (40′ in diameter) around the planetary nebula NGC7293 (the Helix Nebula) observed in the 12 μm band from the Wide-field Infrared Survey Explorer all-sky survey. The mid-infrared halo has an axisymmetric structure with a sharp boundary to the northeast and a more diffuse boundary to the southwest, suggesting an interaction between the stellar wind and the interstellar medium (ISM). The symmetry axis of the halo is well aligned with that of a northeast arc, suggesting that the two structures are physically associated. We have attempted to fit the observed geometry with a model of a moving steady-state stellar wind interacting with the ISM. Possible combinations of the ISM density and the stellar velocity are derived from these fittings. The discrepancies between the model and the observations suggest that the stellar mass loss has a more complicated history, including possible time and angle dependences. © 2012 The American Astronomical Society. All rights reserved.-
dc.languageengen_US
dc.publisherInstitute of Physics Publishing, Inc. The Journal's web site is located at http://iopscience.iop.org/0004-637X/-
dc.relation.ispartofThe Astrophysical Journalen_US
dc.rightsThe Astrophysical Journal. Copyright © Institute of Physics Publishing, Inc.-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectInfrared: ism-
dc.subjectIsm: structure-
dc.subjectPlanetary nebulae: individual: helix nebula (ngc 7293)-
dc.subjectStars: agb and post-agb-
dc.titleDiscovery of a Halo around the helix nebula NGC7293 in the wise all-sky surveyen_US
dc.typeArticleen_US
dc.identifier.emailZhang, Y: zhangy96@hku.hken_US
dc.identifier.emailHsia, CH: xiazh@hku.hken_US
dc.identifier.emailKwok, S: deannote@hku.hken_US
dc.identifier.authorityZhang, Y=rp00841en_US
dc.identifier.authorityHsia, C=rp00706en_US
dc.identifier.authorityKwok, S=rp00716en_US
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1088/0004-637X/755/1/53-
dc.identifier.scopuseid_2-s2.0-84864467802-
dc.identifier.hkuros203243en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84864467802&selection=ref&src=s&origin=recordpage-
dc.identifier.volume755en_US
dc.identifier.issue1, article no. 53-
dc.identifier.eissn1538-4357-
dc.identifier.isiWOS:000306909500053-
dc.publisher.placeUnited States-
dc.identifier.scopusauthoridZhang, Y=23768446500-
dc.identifier.scopusauthoridHsia, CH=14058287100-
dc.identifier.scopusauthoridKwok, S=22980498300-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats