Visibility stacking in the quest for type Ia supernova radio emission
We describe the process of stacking radio interferometry visibilities to form a deep composite image and its application to the observation of transient phenomena. We apply "visibility stacking" to 46 archival Very Large Array observations of nearby type Ia supernovae (SNeIa). This new app...
| Main Authors: | , , |
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| Format: | Journal Article |
| Published: |
2011
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| Online Access: | http://hdl.handle.net/20.500.11937/34578 |
| _version_ | 1848754260645249024 |
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| author | Hancock, Paul Gaensler, B. Murphy, T. |
| author_facet | Hancock, Paul Gaensler, B. Murphy, T. |
| author_sort | Hancock, Paul |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We describe the process of stacking radio interferometry visibilities to form a deep composite image and its application to the observation of transient phenomena. We apply "visibility stacking" to 46 archival Very Large Array observations of nearby type Ia supernovae (SNeIa). This new approach provides an upper limit on the SNIa ensemble peak radio luminosity of 1.2 × 1025 erg s–1 Hz–1 at 5 GHz, which is 5-10 times lower than previously measured. This luminosity implies an upper limit on the average companion stellar wind mass-loss rate of 1.3 × 10–7 M ☉ yr–1. This mass-loss rate is consistent with the double degenerate scenario for SNeIa and rules out intermediate- and high-mass companions in the single degenerate scenario. In the era of time domain astronomy, techniques such as visibility stacking will be important in extracting the maximum amount of information from observations of populations of short-lived events. |
| first_indexed | 2025-11-14T08:37:35Z |
| format | Journal Article |
| id | curtin-20.500.11937-34578 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:37:35Z |
| publishDate | 2011 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-345782018-03-29T09:09:00Z Visibility stacking in the quest for type Ia supernova radio emission Hancock, Paul Gaensler, B. Murphy, T. We describe the process of stacking radio interferometry visibilities to form a deep composite image and its application to the observation of transient phenomena. We apply "visibility stacking" to 46 archival Very Large Array observations of nearby type Ia supernovae (SNeIa). This new approach provides an upper limit on the SNIa ensemble peak radio luminosity of 1.2 × 1025 erg s–1 Hz–1 at 5 GHz, which is 5-10 times lower than previously measured. This luminosity implies an upper limit on the average companion stellar wind mass-loss rate of 1.3 × 10–7 M ☉ yr–1. This mass-loss rate is consistent with the double degenerate scenario for SNeIa and rules out intermediate- and high-mass companions in the single degenerate scenario. In the era of time domain astronomy, techniques such as visibility stacking will be important in extracting the maximum amount of information from observations of populations of short-lived events. 2011 Journal Article http://hdl.handle.net/20.500.11937/34578 10.1088/2041-8205/735/2/L35 restricted |
| spellingShingle | Hancock, Paul Gaensler, B. Murphy, T. Visibility stacking in the quest for type Ia supernova radio emission |
| title | Visibility stacking in the quest for type Ia supernova radio emission |
| title_full | Visibility stacking in the quest for type Ia supernova radio emission |
| title_fullStr | Visibility stacking in the quest for type Ia supernova radio emission |
| title_full_unstemmed | Visibility stacking in the quest for type Ia supernova radio emission |
| title_short | Visibility stacking in the quest for type Ia supernova radio emission |
| title_sort | visibility stacking in the quest for type ia supernova radio emission |
| url | http://hdl.handle.net/20.500.11937/34578 |