Zobrazeno 1 - 10
of 140
pro vyhledávání: '"Leka K. D."'
Solar energetic events are caused by the release of magnetic energy accumulated in the solar atmosphere. To understand their initiating physical mechanisms, the dynamics of the coronal magnetic fields must be studied. Unfortunately, the dominant mech
Externí odkaz:
http://arxiv.org/abs/2408.06430
Autor:
Halford Alexa J., Kellerman Adam C., Garcia-Sage Katherine, Klenzing Jeffrey, Carter Brett A., McGranaghan Ryan M., Guild Timothy, Cid Consuelo, Henney Carl J., Ganushkina Natalia Yu., Burrell Angeline G., Terkildsen Mike, Welling Daniel T., Murray Sophie A., Leka K. D., McCollough James P., Thompson Barbara J., Pulkkinen Antti, Fung Shing F., Bingham Suzy, Bisi Mario M., Liemohn Michael W., Walsh Brian M., Morley Steven K.
Publikováno v:
Journal of Space Weather and Space Climate, Vol 9, p A34 (2019)
The space physics community continues to grow and become both more interdisciplinary and more intertwined with commercial and government operations. This has created a need for a framework to easily identify what projects can be used for specific app
Externí odkaz:
https://doaj.org/article/f4e7e2635ac64946b581cf30a63e3bed
Autor:
Pevtsov, Alexei A., Martinez-Pillet, V., Gilbert, H., de Wijn, A. G., Roth, M., Gosain, S., Upton, L. A., Katsukawa, Y., Burkepile, J., Zhang, Jie, Reardon, K. P., Bertello, L., Jain, K., Tripathy, S. C., Leka, K. D.
Long-term synoptic observations of the Sun are critical for advancing our understanding of Sun as an astrophysical object, understanding the solar irradiance and its role in solar-terrestrial climate, for developing predictive capabilities of solar e
Externí odkaz:
http://arxiv.org/abs/2211.06712
Autor:
Jain, Kiran, Lindsey, C., Adamson, E., Arge, C. N., Berger, T. E., Braun, D. C., Chen, R., Collado-Vega, Y. M., Dikpati, M., Felipe, T., Henney, C. J., Hoeksema, J. T., Komm, R. W., Leka, K. D., Marble, A. R., Pillet, V. Martinez, Miesch, M., Nickisch, L. J., Pevtsov, A. A., Pizzo, V. J., Tobiska, W. K., Tripathy, S. C., Zhao, J.
The purpose of this white paper is to put together a coherent vision for the role of helioseismic monitoring of magnetic activity in the Sun's far hemisphere that will contribute to improving space weather forecasting as well as fundamental research
Externí odkaz:
http://arxiv.org/abs/2210.01291
Autor:
Fouhey, David F., Higgins, Richard E. L., Antiochos, Spiro K., Barnes, Graham, DeRosa, Marc L., Hoeksema, J. Todd, Leka, K. D., Liu, Yang, Schuck, Peter W., Gombosi, Tamas I.
We investigate the cross-calibration of the Hinode/SOT-SP and SDO/HMI instrument meta-data, specifically the correspondence of the scaling and pointing information. Accurate calibration of these datasets gives the correspondence needed by inter-instr
Externí odkaz:
http://arxiv.org/abs/2209.15036
Autor:
Bertello, L., Arge, N., De Wijn, A. G., Gosain, S., Henney, C., Leka, K. D., Linker, J., Liu, Y., Luhmann, J., Macniece, P. J., Petrie, G., Pevtsov, A., Pevtsov, A. A.
This white paper advocates the importance of multi-height measurements of the vector magnetic field in the solar atmosphere. As briefly described in this document, these measurements are critical for addressing some of the most fundamental questions
Externí odkaz:
http://arxiv.org/abs/2209.04453
The problem of bias, meaning over- or underestimation, of the component perpendicular to the line-of-sight, Bperp, in vector magnetic field maps is discussed. Previous works on this topic have illustrated that the problem exists; here we perform nove
Externí odkaz:
http://arxiv.org/abs/2207.11572
Autor:
Higgins, Richard E. L., Fouhey, David F., Zhang, Dichang, Antiochos, Spiro K., Barnes, Graham, Hoeksema, J. Todd, Leka, K. D., Liu, Yang, Schuck, Peter W., Gombosi, Tamas I.
The Helioseismic and Magnetic Imager (HMI) onboard NASA's Solar Dynamics Observatory (SDO) produces estimates of the photospheric magnetic field which are a critical input to many space weather modelling and forecasting systems. The magnetogram produ
Externí odkaz:
http://arxiv.org/abs/2103.17273
In our earlier study of this series (Park et al. 2020, Paper I), we examined the hemispheric sign preference (HSP) of magnetic helicity flux $dH/dt$ across photospheric surfaces of 4802 samples of 1105 unique active regions (ARs) observed during sola
Externí odkaz:
http://arxiv.org/abs/2102.13331
Autor:
Pevtsov, Alexei A., Liu, Yang, Virtanen, Ilpo, Bertello, Luca, Mursula, Kalevi, Leka, K. D., Hughes, Anna L. H.
Full disk vector magnetic fields are used widely for developing better understanding of large-scale structure, morphology, and patterns of the solar magnetic field. The data are also important for modeling various solar phenomena. However, observatio
Externí odkaz:
http://arxiv.org/abs/2101.07204