Zobrazeno 1 - 10
of 813
pro vyhledávání: '"Brooks, P. H."'
Large gradual solar energetic particle (SEP) events can pose a radiation risk to crewed spaceflight and a significant threat to near-Earth satellites however, the origin of the SEP seed particle population, how these particles are released, accelerat
Externí odkaz:
http://arxiv.org/abs/2410.22814
Autor:
Brooks, David H., Warren, Harry P., Baker, Deborah, Matthews, Sarah A., Yardley, Stephanie L.
Plasma composition measurements are a vital tool for the success of current and future solar missions, but density and temperature insensitive spectroscopic diagnostic ratios are sparse, and their underlying accuracy in determining the magnitude of t
Externí odkaz:
http://arxiv.org/abs/2410.15606
Autor:
To, Andy S. H., Brooks, David H., Imada, Shinsuke, French, Ryan J., van Driel-Gesztelyi, Lidia, Baker, Deborah, Long, David M., Ashfield IV, William, Hayes, Laura A.
Solar flares exhibit complex variations in elemental abundances compared to photospheric values. We examine the spatial and temporal evolution of coronal abundances in the X8.2 flare on 2017 September 10, aiming to interpret the often observed high f
Externí odkaz:
http://arxiv.org/abs/2409.18188
Autor:
Baker, D., van Driel-Gesztelyi, L., James, A. W., Demoulin, P., To, A. S. H., Murabito, M., Long, D. M., Brooks, D. H., McKevitt, J., Laming, J. M., Green, L. M., Yardley, S. L., Valori, G., Mihailescu, T., Matthews, S. A., Kuniyoshi, H.
Within the coronae of stars, abundances of those elements with low first ionization potential (FIP) often differ from their photospheric values. The coronae of the Sun and solar-type stars mostly show enhancements of low-FIP elements (the FIP effect)
Externí odkaz:
http://arxiv.org/abs/2405.07755
We present a study of spectral line width measurements from the Extreme Ultraviolet Imaging Spectrometer (EIS) on {\it Hinode}. We used spectral line profiles of Fe {\sc xvi} 262.984 {\AA}, Fe {\sc xiv} 264.787 {\AA}, Fe {\sc xiv} 270.519 {\AA}, Fe {
Externí odkaz:
http://arxiv.org/abs/2404.17037
Autor:
Murabito, Mariarita, Stangalini, Marco, Laming, J. Martin, Baker, Deborah, To, Andy S. H., Long, David M., Brooks, David H., Jafarzadeh, Shahin, Jess, David B., Valori, Gherardo
We investigate the propagation of Alfv\'en waves in the solar chromosphere, distinguishing between upward and downward propagating waves. We find clear evidence for the reflection of waves in the chromosphere and differences in propagation between ca
Externí odkaz:
http://arxiv.org/abs/2404.08305
Autor:
Long, David M., Baker, Deborah, To, Andy S. H., van Driel-Gesztelyi, Lidia, Brooks, David H., Stangalini, Marco, Murabito, Mariarita, James, Alexander W., Mathioudakis, Mihalis, Testa, Paola
The composition of the solar corona differs from that of the photosphere, with the plasma thought to fractionate in the solar chromosphere according to the First Ionisation Potential (FIP) of the different elements. This produces a FIP bias, wherein
Externí odkaz:
http://arxiv.org/abs/2403.06711
Autor:
Brooks, David H., Reep, Jeffrey W., Ugarte-Urra, Ignacio, Unverferth, John E., Warren, Harry P.
A significant impediment to solving the coronal heating problem is that we currently only observe active region (AR) loops in their cooling phase. Previous studies showed that the evolution of cooling loop densities and apex temperatures are insensit
Externí odkaz:
http://arxiv.org/abs/2401.04537
Autor:
Mihailescu, Teodora, Brooks, David H., Laming, J. Martin, Baker, Deborah, Green, Lucie M., James, Alexander W., Long, David M., van Driel-Gesztelyi, Lidia, Stangalini, Marco
The plasma composition of the solar corona is different from that of the solar photosphere. Elements that have a low first ionisation potential (FIP) are preferentially transported to the corona and, therefore, show enhanced abundances in the corona
Externí odkaz:
http://arxiv.org/abs/2310.13677
Autor:
Long, David M., Green, Lucie M., Pecora, Francesco, Brooks, David H., Strecker, Hanna, Orozco-Suárez, David, Hayes, Laura A., Davies, Emma E., Amerstorfer, Ute V., Mierla, Marilena, Lario, David, Berghmans, David, Zhukov, Andrei N., Rüdisser, Hannah T.
Magnetic flux ropes are a key component of coronal mass ejections, forming the core of these eruptive phenomena. However, determining whether a flux rope is present prior to eruption onset and, if so, the rope's handedness and the number of turns tha
Externí odkaz:
http://arxiv.org/abs/2308.14651