G64.5+0.9: a new shell supernova remnant with unusual central emission
We present observations between 1.4 and 18 GHz con?rming that G64.5+0.9 is a new Galacticshell supernova remnant, using the Very Large Array and the Arcminute Microkelvin Imager.The remnant is a shell 8 arcmin in diameter with a spectral index of a = 0.47 ± 0.03 (witha de?ned such that ?ux density S...
| Main Authors: | , , , , , , , , , , , , , , , |
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| Format: | Journal Article |
| Published: |
Oxford University Press
2009
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| Online Access: | http://hdl.handle.net/20.500.11937/20172 |
| _version_ | 1848750233606946816 |
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| author | Hurley-Walker, Natasha Davies, M. Franzen, Thomas Grainge, K. Green, D. Hobson, M. Lasenby, A. Pooley, G. Rodriguez-Gonzalvez, C. Saunders, R. Scaife, A. Scott, P. Shimwell, T. Titterington, D. Waldram, E. Zwart, J. |
| author_facet | Hurley-Walker, Natasha Davies, M. Franzen, Thomas Grainge, K. Green, D. Hobson, M. Lasenby, A. Pooley, G. Rodriguez-Gonzalvez, C. Saunders, R. Scaife, A. Scott, P. Shimwell, T. Titterington, D. Waldram, E. Zwart, J. |
| author_sort | Hurley-Walker, Natasha |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We present observations between 1.4 and 18 GHz con?rming that G64.5+0.9 is a new Galacticshell supernova remnant, using the Very Large Array and the Arcminute Microkelvin Imager.The remnant is a shell 8 arcmin in diameter with a spectral index of a = 0.47 ± 0.03 (witha de?ned such that ?ux density S varies with frequency ? as S ? ?-a). There is also emissionnear the centre of the shell,1 arcmin in extent, with a spectral index of a =0.81±0.02. Wedo not ?nd any evidence for spectral breaks for either source within our frequency range. Thenature of the central object is unclear and requires further investigation, but we argue that itis most unlikely to be extragalactic. It is dif?cult to avoid the conclusion that it is associatedwith the shell, although its spectrum is very unlike that of known pulsar wind nebulae. |
| first_indexed | 2025-11-14T07:33:35Z |
| format | Journal Article |
| id | curtin-20.500.11937-20172 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:33:35Z |
| publishDate | 2009 |
| publisher | Oxford University Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-201722017-09-13T13:48:57Z G64.5+0.9: a new shell supernova remnant with unusual central emission Hurley-Walker, Natasha Davies, M. Franzen, Thomas Grainge, K. Green, D. Hobson, M. Lasenby, A. Pooley, G. Rodriguez-Gonzalvez, C. Saunders, R. Scaife, A. Scott, P. Shimwell, T. Titterington, D. Waldram, E. Zwart, J. radiation mechanisms: non-thermal supernova remnants radio continuum: ISM We present observations between 1.4 and 18 GHz con?rming that G64.5+0.9 is a new Galacticshell supernova remnant, using the Very Large Array and the Arcminute Microkelvin Imager.The remnant is a shell 8 arcmin in diameter with a spectral index of a = 0.47 ± 0.03 (witha de?ned such that ?ux density S varies with frequency ? as S ? ?-a). There is also emissionnear the centre of the shell,1 arcmin in extent, with a spectral index of a =0.81±0.02. Wedo not ?nd any evidence for spectral breaks for either source within our frequency range. Thenature of the central object is unclear and requires further investigation, but we argue that itis most unlikely to be extragalactic. It is dif?cult to avoid the conclusion that it is associatedwith the shell, although its spectrum is very unlike that of known pulsar wind nebulae. 2009 Journal Article http://hdl.handle.net/20.500.11937/20172 10.1111/j.1365-2966.2009.15078.x Oxford University Press unknown |
| spellingShingle | radiation mechanisms: non-thermal supernova remnants radio continuum: ISM Hurley-Walker, Natasha Davies, M. Franzen, Thomas Grainge, K. Green, D. Hobson, M. Lasenby, A. Pooley, G. Rodriguez-Gonzalvez, C. Saunders, R. Scaife, A. Scott, P. Shimwell, T. Titterington, D. Waldram, E. Zwart, J. G64.5+0.9: a new shell supernova remnant with unusual central emission |
| title | G64.5+0.9: a new shell supernova remnant with unusual central emission |
| title_full | G64.5+0.9: a new shell supernova remnant with unusual central emission |
| title_fullStr | G64.5+0.9: a new shell supernova remnant with unusual central emission |
| title_full_unstemmed | G64.5+0.9: a new shell supernova remnant with unusual central emission |
| title_short | G64.5+0.9: a new shell supernova remnant with unusual central emission |
| title_sort | g64.5+0.9: a new shell supernova remnant with unusual central emission |
| topic | radiation mechanisms: non-thermal supernova remnants radio continuum: ISM |
| url | http://hdl.handle.net/20.500.11937/20172 |