Results 71 to 80 of about 14,551 (173)

Large-Scale Dynamics of the Convection Zone and Tachocline

Living Reviews in Solar Physics, 2005
The past few decades have seen dramatic progress in our understanding of solar interior dynamics, prompted by the relatively new science of helioseismology and increasingly sophisticated numerical models.
Miesch Mark S.
doaj  

Study of sunspot motion and flow fields associated with solar flares [PDF]

, 2010
Evolution of sunspot structure and photospheric magnetic fields are important to understand how the flare energy is built up and released. With high-resolution optical data, it is possible to examine in details the optical flows of the photosphere and ...
Wang, Shuo, Chang Liu, Haimin Wang, Wang, Haimin, Shuo Wang, Liu, Chang   +5 more
core   +1 more source

Patterns and trends of cloud cover and photosynthetically active solar irradiation in southern England: implications for vegetation productivity [PDF]

, 2013
The aim of the research described in this thesis was to investigate the spatial and temporal variability of photosynthetically active radiation (PAR) over the UK, in particular, to estimate both global PAR and the fraction of diffuse PAR at spatial and ...
Pankaew, Prasan
core  

A decade of the Super Dual Auroral Radar Network (SuperDARN): scientific achievements, new techniques and future directions [PDF]

, 2007
The Super Dual Auroral Radar Network (SuperDARN) has been operating as an international co-operative organisation for over 10 years. The network has now grown so that the fields of view of its 18 radars cover the majority of the northern and southern ...
M. P. Freeman, Sofko, G.J., P. L. Dyson, Ruohoniemi, J. M., Kikuchi, T., J. M. Ruohoniemi, Chisham, G., Walker, A.D.M., Dyson, P. L., R. A. Greenwald, G. J. Sofko, Milan, S.E., T. K. Yeoman, M. Pinnock, J.-P. Villain, Freeman, M. P., A. Grocott, Rash, J.P.S., Sato, N., Yeoman, T. K., Freeman, M.P., Bristow, W.A., Milan, S. E., K. A. McWilliams, N. Sato, Lester, M., Villain, J.-P., Greenwald, R.A., G. Chisham, Bristow, W. A., A. D. M. Walker, Grocott, A., Mcwilliams, K. A., M. Lester, Pinnock, M., Dyson, P.L., Walker, A. D. M., McWilliams, K.A., T. Kikuchi, S. E. Milan, Ruohoniemi, J.M., Greenwald, R. A., Sofko, G. J., J. P. S. Rash, Rash, J. P. S., W. A. Bristow, Yeoman, T.K.   +46 more
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Space- and ground-based investigations of solar wind-magnetosphere-ionosphere coupling [PDF]

, 2006
This paper provides a brief review of the understanding of the coupled solar wind–magnetosphere–ionosphere system that can be attained from observations of the size of the ionospheric polar caps from space and the ground.
Milan, S. E., Wild, J. A., Draper, N. C., Grocott, A.   +3 more
core  

Three years of Sun-as-a-star radial-velocity observations on the approach to solar minimum [PDF]

, 2019
The time-variable velocity fields of solar-type stars limit the precision of radial-velocity determinations of their planets' masses, obstructing detection of Earth twins.
A Sozzetti, Dumusque, X., M Cecconi, Phillips, D., Micela, G., Sasselov, D., A Ghedina, Milbourne, T., A Coffinet, D Phillips, Rice, K., Pepe, F., Mortier, A., M Lodi, G Micela, Udry, S., Cosentino, R., T Milbourne, Latham, D. W., Haywood, R. D., Charbonneau, D., A Szentgyorgyi, S Thompson, Coffinet, A., J Maldonado, Glenday, A., X Dumusque, Li, C. H., M Lopez-Morales, F Pepe, C A Watson, Maldonado, J., Ghedina, A., C Lovis, Cegla, H. M., Walsworth, R., Li, C. -H., E Molinari, K Rice, Li, M. Gonzalez C. -H., A Collier Cameron, R Walsworth, Li, C-H, C-H Li, Costes, J., Watson, C. A., Mortier, A.; id_orcid, Poretti, E., Cameron, A. Collier, E Poretti, Gonzalez, M., A Mortier, Molinari, E., D W Latham, A Glenday, M Gonzalez, N Langellier, N Buchschacher, Langellier, N., Thompson, S., R D Haywood, S Udry, D Charbonneau, Lodi, M., H M Cegla, Buchschacher, N., Szentgyorgyi, A., Lovis, C., J Costes, S H Saar, Sozzetti, A., L Malavolta, D Sasselov, Malavolta, L., Cecconi, M., Saar, S. H., Rice, K.; id_orcid, Lopez-Morales, M., R Cosentino   +78 more
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NNHMC: An Efficient Stokes Inversion Method Using a Neural Network (NN) Model Combined with the Hamiltonian Monte Carlo (HMC) Algorithm

The Astrophysical Journal
The Milne–Eddington (M-E) atmosphere model is commonly adopted in the inversion of the magnetic fields in the solar photosphere. By applying the Levenberg–Marquardt algorithm or training a neural network (NN) model, the magnetic field vector can be ...
Chong Xu, JinLiang Wang, Hao Li, ZiYao Hu, XianYong Bai, JiaBen Lin, Hui Liu, ZhenYu Jin, KaiFan Ji   +8 more
doaj   +1 more source

Equilibrium and stability properties of collisionless current sheet models [PDF]

, 2013
The work in this thesis focuses primarily on equilibrium and stability properties of collisionless current sheet models, in particular of the force-free Harris sheet model.
Wilson, Fiona
core  

Recurrent flares in active region NOAA 11283 [PDF]

, 2015
Context. Flares and coronal mass ejections (CMEs) are solar phenomena that are not yet fully understood. Several investigations have been performed to single out their related physical parameters that can be used as indices of the magnetic complexity ...
Pietropaolo, E., Villante, U, Carbone, V., Berrilli, F., E. Pietropaolo, Guglielmino, S. L., G. Consolini, A. Elmhamdi, CONSOLINI, Giuseppe, S. Fineschi, I. Ermolli, U. Villante, Vecchio, A, Landi Degl'Innocenti, E., F. Berrilli, Guglielmino, SL, Elmhamdi, A., Pallocchia, G, A. S. Kordi, Laurenza, M, Berrilli, F, Pietropaolo, E, V. Carbone, Fineschi, S., PALLOCCHIA, Giuseppe, P. Francia, Francia, P, M. de Lauretis, Zuccarello, F, Kordi, AS, Elmhamdi, A, Kordi, A. S., Romano, P, De Lauretis, M, Zuccarello, Francesca, M. Vellante, Lepreti, F., E. Landi Degl'innocenti, A. Vecchio, F. Zuccarello, Del Moro, D., Lepreti, F, Romano P., M. F. Marcucci, ERMOLLI, Ilaria, Francia, P., Del Moro, D, D. Del Moro, Ermolli, I, Carbone, V, Landi Degl'Innocenti, E, S. L. Guglielmino, Vellante, M, Bruno, R, Marcucci, MF, P. Romano, E. Landi Degl’Innocenti, Marcucci, M. F., ROMANO, Paolo, LAURENZA, MONICA, R. Bruno, BRUNO, Roberto, M. Romoli, Villante, U., Fineschi, S, de Lauretis, M., Vellante, M., Romoli, M, Romoli, M., M. Laurenza, F. Lepreti, G. Pallocchia, Consolini, G, Vecchio, A.   +73 more
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The ADAHELI Solar Mission [PDF]

, 2008
DAHELI (Advanced Astronomy for HELIOphysics) is an Italian Space project for the investigation of solar photospheric and chromospheric dynamics, via high-resolution spectro-polarimetric observations in the near-infrared spectral range.
Cavallini, F., Carbone, V., Greco, V., I., Roselli, L., Berrilli, F., Di Mauro, Moretti, P. F., Orsini, S., Ventura, P., Consolini, G., Romano, P., Zuccarello, F., Velli, M., M. P. , Ermolli, PIETROPAOLO, Ermanno, Bigazzi, A., Valdettaro, L., Romoli, M., White, S. M., Cauzzi, G.   +20 more
core   +2 more sources