AMI observations of northern supernova remnants at 14-18 GHz
We present observations between 14.2 and 17.9 GHz of 12 reported supernova remnants (SNRs) made with the Arcminute Microkelvin Imager Small Array (AMI SA). In conjunction with data from the literature at lower radio frequencies, we determine spectra of these objects. For well-studied SNRs (Cas A, Ty...
| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2009
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| _version_ | 1797077221580472320 |
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| author | Hurley-Walker, N Scaife, A Green, D Davies, M Grainge, K Hobson, M Jones, M Kaneko, T Lasenby, A Pooley, G Saunders, R Scott, P Titterington, D Waldram, E Zwart, J |
| author_facet | Hurley-Walker, N Scaife, A Green, D Davies, M Grainge, K Hobson, M Jones, M Kaneko, T Lasenby, A Pooley, G Saunders, R Scott, P Titterington, D Waldram, E Zwart, J |
| author_sort | Hurley-Walker, N |
| collection | OXFORD |
| description | We present observations between 14.2 and 17.9 GHz of 12 reported supernova remnants (SNRs) made with the Arcminute Microkelvin Imager Small Array (AMI SA). In conjunction with data from the literature at lower radio frequencies, we determine spectra of these objects. For well-studied SNRs (Cas A, Tycho's SNR, 3C 58 and the Crab Nebula), the results are in good agreement with spectra based on previous results. For the less well-studied remnants, the AMI SA observations provide higher-frequency radio observations than previously available, and better constrain their radio spectra. The AMI SA results confirm a spectral turnover at ≃11 GHz for the filled-centre remnant G74.9+1.2. We also see a possible steepening of the spectrum of the filled-centre remnant G54.1+0.3 within the AMI SA frequency band compared with lower frequencies. We confirm that G84.9+0.5, which had previously been identified as a SNR, is rather an H ii region and has a flat radio spectrum. © 2009 RAS. |
| first_indexed | 2024-03-07T00:14:48Z |
| format | Journal article |
| id | oxford-uuid:7a71cdd4-d202-4250-b5a5-23a13db39931 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T00:14:48Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | oxford-uuid:7a71cdd4-d202-4250-b5a5-23a13db399312022-03-26T20:44:10ZAMI observations of northern supernova remnants at 14-18 GHzJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:7a71cdd4-d202-4250-b5a5-23a13db39931EnglishSymplectic Elements at Oxford2009Hurley-Walker, NScaife, AGreen, DDavies, MGrainge, KHobson, MJones, MKaneko, TLasenby, APooley, GSaunders, RScott, PTitterington, DWaldram, EZwart, JWe present observations between 14.2 and 17.9 GHz of 12 reported supernova remnants (SNRs) made with the Arcminute Microkelvin Imager Small Array (AMI SA). In conjunction with data from the literature at lower radio frequencies, we determine spectra of these objects. For well-studied SNRs (Cas A, Tycho's SNR, 3C 58 and the Crab Nebula), the results are in good agreement with spectra based on previous results. For the less well-studied remnants, the AMI SA observations provide higher-frequency radio observations than previously available, and better constrain their radio spectra. The AMI SA results confirm a spectral turnover at ≃11 GHz for the filled-centre remnant G74.9+1.2. We also see a possible steepening of the spectrum of the filled-centre remnant G54.1+0.3 within the AMI SA frequency band compared with lower frequencies. We confirm that G84.9+0.5, which had previously been identified as a SNR, is rather an H ii region and has a flat radio spectrum. © 2009 RAS. |
| spellingShingle | Hurley-Walker, N Scaife, A Green, D Davies, M Grainge, K Hobson, M Jones, M Kaneko, T Lasenby, A Pooley, G Saunders, R Scott, P Titterington, D Waldram, E Zwart, J AMI observations of northern supernova remnants at 14-18 GHz |
| title | AMI observations of northern supernova remnants at 14-18 GHz |
| title_full | AMI observations of northern supernova remnants at 14-18 GHz |
| title_fullStr | AMI observations of northern supernova remnants at 14-18 GHz |
| title_full_unstemmed | AMI observations of northern supernova remnants at 14-18 GHz |
| title_short | AMI observations of northern supernova remnants at 14-18 GHz |
| title_sort | ami observations of northern supernova remnants at 14 18 ghz |
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