MeerKAT observations of Procyon at 815.5 MHz
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arXiv
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866929551472328704 |
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| author | Heywood, Ian Siemion, Andrew P. V. Czech, Daniel Ertel, Steve Drew, Jamie Grattan, Kyran Wagner, Kevin Worden, S. Pete |
| author_facet | Heywood, Ian Siemion, Andrew P. V. Czech, Daniel Ertel, Steve Drew, Jamie Grattan, Kyran Wagner, Kevin Worden, S. Pete |
| contents | We have conducted observations of the nearby (11.46 ly) star system Procyon, using MeerKAT's UHF (544-1087 MHz) receivers. We produce full-Stokes time and frequency integrated continuum images, as well as total intensity time series imaging at 8 s cadence, and full-Stokes vector-averaged dynamic spectra from the visibilities in order to search for transient activity such as flaring events. We detect no significant radio emission from the system, and estimate an upper limit on the circular polarisation fraction of 65 per cent (3$σ$ confidence level). A comparison with previous VLA observations places a 3$σ$ lower limit on the spectral index between 815.5 and 8400 MHz of 0.26, however long-term significant variability over the last 33 years cannot be ruled out without further, regular radio monitoring of the system. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_15069 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | MeerKAT observations of Procyon at 815.5 MHz Heywood, Ian Siemion, Andrew P. V. Czech, Daniel Ertel, Steve Drew, Jamie Grattan, Kyran Wagner, Kevin Worden, S. Pete Solar and Stellar Astrophysics Instrumentation and Methods for Astrophysics We have conducted observations of the nearby (11.46 ly) star system Procyon, using MeerKAT's UHF (544-1087 MHz) receivers. We produce full-Stokes time and frequency integrated continuum images, as well as total intensity time series imaging at 8 s cadence, and full-Stokes vector-averaged dynamic spectra from the visibilities in order to search for transient activity such as flaring events. We detect no significant radio emission from the system, and estimate an upper limit on the circular polarisation fraction of 65 per cent (3$σ$ confidence level). A comparison with previous VLA observations places a 3$σ$ lower limit on the spectral index between 815.5 and 8400 MHz of 0.26, however long-term significant variability over the last 33 years cannot be ruled out without further, regular radio monitoring of the system. |
| title | MeerKAT observations of Procyon at 815.5 MHz |
| topic | Solar and Stellar Astrophysics Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2410.15069 |