The magnetic properties of photospheric magnetic bright points with high-resolution spectropolarimetry
| العنوان: | The magnetic properties of photospheric magnetic bright points with high-resolution spectropolarimetry |
|---|---|
| المؤلفون: | Aaron Reid, Sergiy Shelyag, Mihalis Mathioudakis, Rebecca L. Hewitt, Vasco Manuel de Jorge Henriques, Marco Stangalini, David B. Jess, Shahin Jafarzadeh, P. H. Keys, D. Del Moro |
| المصدر: | Keys, P H, Reid, A, Mathioudakis, M, Shelyag, S, Henriques, V M J, Hewitt, R L, Del Moro, D, Jafarzadeh, S, Jess, D B & Stangalini, M 2019, ' The magnetic properties of photospheric magnetic bright points with high-resolution spectropolarimetry ', Monthly Notices of the Royal Astronomical Society: Letters, vol. 488, no. 1, pp. L53-L58 . https://doi.org/10.1093/mnrasl/slz097 Monthly Notices of the Royal Astronomical Society: Letters |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Convection, Activity [Sun], Physics and Astronomy (miscellaneous), photosphere [Sun], FOS: Physical sciences, Flux, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Physics and Astronomy(all), 01 natural sciences, sun: photosphere, sun: activity, sun: evolution, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Diffusion (business), 010303 astronomy & astrophysics, Evolution [Sun], Solar and Stellar Astrophysics (astro-ph.SR), Astrophysics::Galaxy Astrophysics, Physics, Photosphere, Settore FIS/05, 010308 nuclear & particles physics, Track (disk drive), Astronomy and Astrophysics, Magnetic field, Solar telescope, Astrophysics - Solar and Stellar Astrophysics, Point distribution model, Space and Planetary Science |
| الوصف: | Magnetic bright points are small-scale magnetic elements ubiquitous across the solar disk, with the prevailing theory suggesting that they form due to the process of convective collapse. Employing a unique full Stokes spectropolarimetric data set of a quiet Sun region close to disk centre obtained with the Swedish Solar Telescope, we look at general trends in the properties of magnetic bright points. In total we track 300 MBPs in the data set and we employ NICOLE inversions to ascertain various parameters for the bright points such as line-of-sight magnetic field strength and line-of-sight velocity, for comparison. We observe a bimodal distribution in terms of maximum magnetic field strength in the bright points with peaks at ~480 G and ~1700 G, although we cannot attribute the kilogauss fields in this distribution solely to the process of convective collapse. Analysis of MURaM simulations does not return the same bimodal distribution. However, the simulations provide strong evidence that the emergence of new flux and diffusion of this new flux play a significant role in generating the weak bright point distribution seen in our observations. Accepted for publication in MNRAS: Letters |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 0035-8711 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::29357da9a630328d0a42bda978851da9 https://pure.qub.ac.uk/en/publications/the-magnetic-properties-of-photospheric-magnetic-bright-points-with-highresolution-spectropolarimetry(8f72a698-f7a7-40f7-9653-49adabdbc63a).html |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....29357da9a630328d0a42bda978851da9 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 00358711 |
|---|