First VLBI Detection of the Radio Remnant of Supernova 1987A: Evidence for Small-Scale Features
We present a detailed analysis of the first very long baseline interferometry (VLBI) detection of the radio remnant of supernova 1987A. The VLBI data taken in 2007 and 2008 at 1.4 and 1.7 GHz, respectively, provide images sensitive to angular scales from 0farcs1 to 0farcs7, the highest resolution to...
| Main Authors: | , , , , , , , |
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| Format: | Journal Article |
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Institute of Physics Publishing Ltd.
2012
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/40177 |
| _version_ | 1848755795358908416 |
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| author | Ng, C Potter, T Staveley-Smith, L Tingay, Steven Gaensler, B Phillips, C Tzioumis, A Zanardo, G |
| author_facet | Ng, C Potter, T Staveley-Smith, L Tingay, Steven Gaensler, B Phillips, C Tzioumis, A Zanardo, G |
| author_sort | Ng, C |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We present a detailed analysis of the first very long baseline interferometry (VLBI) detection of the radio remnant of supernova 1987A. The VLBI data taken in 2007 and 2008 at 1.4 and 1.7 GHz, respectively, provide images sensitive to angular scales from 0farcs1 to 0farcs7, the highest resolution to date at radio frequencies. The results reveal two extended lobes with an overall morphology consistent with observations at lower resolutions. We find evidence of small-scale features in the radio shell, which possibly consist of compact clumps near the inner surface of the shell. These features have angular extent smaller than 0farcs2 and contribute less than 13% of the total remnant flux density. No central source is detected in the VLBI images. We place a 3s flux density limit of 0.3 mJy on any pulsar or pulsar wind nebula at 1.7 GHz. |
| first_indexed | 2025-11-14T09:01:59Z |
| format | Journal Article |
| id | curtin-20.500.11937-40177 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:01:59Z |
| publishDate | 2012 |
| publisher | Institute of Physics Publishing Ltd. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-401772023-02-22T06:24:24Z First VLBI Detection of the Radio Remnant of Supernova 1987A: Evidence for Small-Scale Features Ng, C Potter, T Staveley-Smith, L Tingay, Steven Gaensler, B Phillips, C Tzioumis, A Zanardo, G high angular resolution supernovae supernova remnants instrumentation individual (SN 1987A) ISM We present a detailed analysis of the first very long baseline interferometry (VLBI) detection of the radio remnant of supernova 1987A. The VLBI data taken in 2007 and 2008 at 1.4 and 1.7 GHz, respectively, provide images sensitive to angular scales from 0farcs1 to 0farcs7, the highest resolution to date at radio frequencies. The results reveal two extended lobes with an overall morphology consistent with observations at lower resolutions. We find evidence of small-scale features in the radio shell, which possibly consist of compact clumps near the inner surface of the shell. These features have angular extent smaller than 0farcs2 and contribute less than 13% of the total remnant flux density. No central source is detected in the VLBI images. We place a 3s flux density limit of 0.3 mJy on any pulsar or pulsar wind nebula at 1.7 GHz. 2012 Journal Article http://hdl.handle.net/20.500.11937/40177 10.1088/2041-8205/728/1/L15 Institute of Physics Publishing Ltd. unknown |
| spellingShingle | high angular resolution supernovae supernova remnants instrumentation individual (SN 1987A) ISM Ng, C Potter, T Staveley-Smith, L Tingay, Steven Gaensler, B Phillips, C Tzioumis, A Zanardo, G First VLBI Detection of the Radio Remnant of Supernova 1987A: Evidence for Small-Scale Features |
| title | First VLBI Detection of the Radio Remnant of Supernova 1987A: Evidence for Small-Scale Features |
| title_full | First VLBI Detection of the Radio Remnant of Supernova 1987A: Evidence for Small-Scale Features |
| title_fullStr | First VLBI Detection of the Radio Remnant of Supernova 1987A: Evidence for Small-Scale Features |
| title_full_unstemmed | First VLBI Detection of the Radio Remnant of Supernova 1987A: Evidence for Small-Scale Features |
| title_short | First VLBI Detection of the Radio Remnant of Supernova 1987A: Evidence for Small-Scale Features |
| title_sort | first vlbi detection of the radio remnant of supernova 1987a: evidence for small-scale features |
| topic | high angular resolution supernovae supernova remnants instrumentation individual (SN 1987A) ISM |
| url | http://hdl.handle.net/20.500.11937/40177 |