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Article: High resolution 36 GHz imaging of the supernova remnant of SN 1987A

TitleHigh resolution 36 GHz imaging of the supernova remnant of SN 1987A
Authors
KeywordsRadio continuum: general
Supernovae: general
Supernovae: individual (SN 1987A)
Supernova remnants
Issue Date2009
PublisherInstitute of Physics Publishing, Inc. The Journal's web site is located at http://iopscience.iop.org/0004-637X/
Citation
The Astrophysical Journal, 2009, v. 705 n. 1, p. 261-271 How to Cite?
AbstractThe aftermath of supernova (SN) 1987A continues to provide spectacular insights into the interaction between an SN blastwave and its circumstellar environment. We here present 36 GHz observations from the Australia Telescope Compact Array of the radio remnant of SN 1987A. These new images, taken in 2008 April and 2008 October, substantially extend the frequency range of an ongoing monitoring and imaging program conducted between 1.4 and 20 GHz. Our 36.2 GHz images have a diffraction-limited angular resolution of 03-04, which covers the gap between high resolution, low dynamic range VLBI images of the remnant and low resolution, high dynamic range images at frequencies between 1 and 20 GHz. The radio morphology of the remnant at 36 GHz is an elliptical ring with enhanced emission on the eastern and western sides, similar to that seen previously at lower frequencies. Model fits to the data in the Fourier domain show that the emitting region is consistent with a thick inclined torus of mean radius 085, and a 2008 October flux density of 27 ± 6 mJy at 36.2 GHz. The spectral index for the remnant at this epoch, determined between 1.4 GHz and 36.2 GHz, is α = –0.83. There is tentative evidence for an unresolved central source with flatter spectral index.
Persistent Identifierhttp://hdl.handle.net/10722/180899
ISSN
2015 Impact Factor: 5.909
2015 SCImago Journal Rankings: 3.266
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorPotter, TM-
dc.contributor.authorStaveley-Smith, L-
dc.contributor.authorNg, CY-
dc.contributor.authorBall, L-
dc.contributor.authorGaensler, BM-
dc.contributor.authorKesteven, MJ-
dc.contributor.authorManchester, RN-
dc.contributor.authorTzioumis, AK-
dc.contributor.authorZanardo, G-
dc.date.accessioned2013-02-01T02:55:32Z-
dc.date.available2013-02-01T02:55:32Z-
dc.date.issued2009-
dc.identifier.citationThe Astrophysical Journal, 2009, v. 705 n. 1, p. 261-271-
dc.identifier.issn0004-637X-
dc.identifier.urihttp://hdl.handle.net/10722/180899-
dc.description.abstractThe aftermath of supernova (SN) 1987A continues to provide spectacular insights into the interaction between an SN blastwave and its circumstellar environment. We here present 36 GHz observations from the Australia Telescope Compact Array of the radio remnant of SN 1987A. These new images, taken in 2008 April and 2008 October, substantially extend the frequency range of an ongoing monitoring and imaging program conducted between 1.4 and 20 GHz. Our 36.2 GHz images have a diffraction-limited angular resolution of 03-04, which covers the gap between high resolution, low dynamic range VLBI images of the remnant and low resolution, high dynamic range images at frequencies between 1 and 20 GHz. The radio morphology of the remnant at 36 GHz is an elliptical ring with enhanced emission on the eastern and western sides, similar to that seen previously at lower frequencies. Model fits to the data in the Fourier domain show that the emitting region is consistent with a thick inclined torus of mean radius 085, and a 2008 October flux density of 27 ± 6 mJy at 36.2 GHz. The spectral index for the remnant at this epoch, determined between 1.4 GHz and 36.2 GHz, is α = –0.83. There is tentative evidence for an unresolved central source with flatter spectral index.-
dc.languageeng-
dc.publisherInstitute of Physics Publishing, Inc. The Journal's web site is located at http://iopscience.iop.org/0004-637X/-
dc.relation.ispartofThe Astrophysical Journal-
dc.rightsThe Astrophysical Journal. Copyright © Institute of Physics Publishing, Inc.-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectRadio continuum: general-
dc.subjectSupernovae: general-
dc.subjectSupernovae: individual (SN 1987A)-
dc.subjectSupernova remnants-
dc.titleHigh resolution 36 GHz imaging of the supernova remnant of SN 1987Aen_US
dc.typeArticleen_US
dc.identifier.emailNg, CY: stephen_ng@hku.hk-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1088/0004-637X/705/1/261-
dc.identifier.volume705-
dc.identifier.issue1-
dc.identifier.spage261-
dc.identifier.epage271-
dc.identifier.isiWOS:000270903200022-
dc.publisher.placeUnited States-

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