A circular polarisation survey for radio stars with the Australian SKA Pathfinder
| العنوان: | A circular polarisation survey for radio stars with the Australian SKA Pathfinder |
|---|---|
| المؤلفون: | Andrew Zic, Joshua Pritchard, Emil Lenc, W. Raja, Adam Stewart, Matthew Whiting, C. L. Hale, Christene Lynch, George Heald, David McConnell, Aidan Hotan, Craig S. Anderson, David L. Kaplan, Vanessa A. Moss, Julie Banfield, James K. Leung, Tara Murphy |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | media_common.quotation_subject, Astrophysics::High Energy Astrophysical Phenomena, Continuum (design consultancy), FOS: Physical sciences, Context (language use), Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, law.invention, Telescope, Pulsar, law, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, 010303 astronomy & astrophysics, Solar and Stellar Astrophysics (astro-ph.SR), Circular polarization, Astrophysics::Galaxy Astrophysics, media_common, Physics, 010308 nuclear & particles physics, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Astronomy and Astrophysics, Stars, Astrophysics - Solar and Stellar Astrophysics, 13. Climate action, Space and Planetary Science, Sky, Brightness temperature |
| الوصف: | We present results from a circular polarisation survey for radio stars in the Rapid ASKAP Continuum Survey (RACS). RACS is a survey of the entire sky south of $\delta=+41^\circ$ being conducted with the Australian Square Kilometre Array Pathfinder telescope (ASKAP) over a 288 MHz wide band centred on 887.5 MHz. The data we analyse includes Stokes I and V polarisation products to an RMS sensitivity of 250 $\mu$Jy PSF$^{-1}$. We searched RACS for sources with fractional circular polarisation above 6 per cent, and after excluding imaging artefacts, polarisation leakage, and known pulsars we identified radio emission coincident with 33 known stars. These range from M-dwarfs through to magnetic, chemically peculiar A- and B-type stars. Some of these are well known radio stars such as YZ CMi and CU Vir, but 23 have no previous radio detections. We report the flux density and derived brightness temperature of these detections and discuss the nature of the radio emission. We also discuss the implications of our results for the population statistics of radio stars in the context of future ASKAP and Square Kilometre Array surveys. Comment: 18 pages, 10 figures, to be published in MNRAS |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::452ba367082a572b35994f4475d3fc91 http://arxiv.org/abs/2102.01801 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....452ba367082a572b35994f4475d3fc91 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |