Results 11 to 20 of about 30,768 (165)

The Sun's global photospheric and coronal magnetic fields : observations and models [PDF]

, 2012
2012LRSP....9....6M Funding: STFC, the Leverhulme Trust and European Commission’s Seventh Framework Programme (FP7/2007-2013) under the grant agreement SWIFF (project no.
Anthony Yeates, Yeates, A.R., Duncan Mackay, Mackay, D.H., Yeates, Anthony Robinson, Mackay, Duncan Hendry   +5 more
core   +1 more source

Assessing electron heat flux dropouts as signatures of magnetic field line disconnection from the Sun [PDF]

, 2005
Suprathermal electrons focused along magnetic field lines, called the strahl, carry heat flux away from the Sun. Various factors can cause heat flux dropouts (HFDs), including times when the strahl almost vanishes.
Larson, DE, D. E. Larson, C. Pagel, Crooker, NU, Pagel, C, N. U. Crooker   +5 more
core   +1 more source

Formation of magnetic flux tubes in cylindrical wedge geometry [PDF]

, 2012
Three-dimensional (3D) MHD numerical simulations have not been able to demonstrate convincingly the spontaneous formation of large vertical flux tubes.
Hurlburt, Neal, Botha, G.J.J., Hurlburt, N. E., Botha, Gert, Rucklidge, A.M., Rucklidge, A. M., Botha, G. J. J., Hurlburt, N.E., Rucklidge, Alistair   +8 more
core   +1 more source

Magnetic fields on young, moderately rotating Sun-like stars - I. HD 35296 and HD 29615 [PDF]

, 2015
Observations of the magnetic fields of young solar-type stars provide a way to investigate the signatures of their magnetic activity and dynamos. Spectropolarimetry enables the study of these stellar magnetic fields and was thus employed at the Telescope
Boro Saikia, S., Waite, I. A., Jeffers, Sandra V., Carter, Brad D., Saikia, S. Boro, Donati, J.-F., Marsden, S. C., Petit, P., Donati, J. F., Jeffers, S. V., Carter, B. D.   +10 more
core   +1 more source

The crucial role of surface magnetic fields for stellar dynamos: Epsilon Eridani, 61 Cygni A, and the Sun [PDF]

, 2022
Cool main-sequence stars, such as the Sun, have magnetic fields which are generated by an internal dynamo mechanism. In the Sun, the dynamo mechanism produces a balance between the amounts of magnetic flux generated and lost over the Sun's 11-year ...
S. C. Marsden, Jeffers, S., Folsom, C. P., P. Petit, Jardine, M., Cameron, R.H., Vidotto, A. A., Petit, P., U. Wolter, Marsden, S., R. H. Cameron, Boro Saikia, S., Vidotto, A., M. Mittag, J. Morin, Marsden, S. C., See, V., C. P. Folsom, Mittag, M., De Almeida Vidotto, A., Morin, J., Jardine, M. M., S. V. Jeffers, Folsom, C., Saikia, S. Boro, A. A. Vidotto, Morin, Julien, M. M. Jardine, Cameron, R. H., Cameron, R., V. See, Jardine, M.M., Jeffers, S.V., Folsom, C.P., Vidotto, A.A., Jeffers, S. V., Wolter, U., S. Boro Saikia, Marsden, S.C.   +38 more
core   +1 more source

Magnetic fields on young, moderately rotating Sun-like stars - II. EK Draconis (HD 129333) [PDF]

, 2017
The magnetic fields, activity and dynamos of young solar-type stars can be empirically studied using time series of spectropolarimetric observations and tomographic imaging techniques such as Doppler imaging and Zeeman-Doppler imaging.
Morin, J., Waite, I. A., Jeffers, Sandra V., Carter, Brad D., Morin, Julien, Donati, J.-F., Vidotto, A. A., Marsden, S. C., Petit, P., Jeffers, S. V., Carter, B. D.   +10 more
core   +1 more source

The appearance, motion, and disappearance of three-dimensional magnetic null points [PDF]

, 2015
N.A.M. acknowledges support from NASA grants NNX11AB61G, NNX12AB25G, and NNX15AF43G; NASA contract NNM07AB07C; and NSF SHINE grants AGS-1156076 and AGS-1358342 to SAO. C.E.P.
Parnell, Clare Elizabeth, Haynes, Andrew Lewis, A. Murphy, Nicholas, Nicholas A. Murphy, Clare E. Parnell, Andrew L. Haynes   +5 more
core   +1 more source

Extreme ultraviolet imaging of three-dimensional magnetic reconnection in a solar eruption [PDF]

, 2015
X.C., J.Q.S., M.D.D., Y.G., P.F.C. and C.F. are supported by NSFC through grants 11303016, 11373023, 11203014 and 11025314, and by NKBRSF through grants 2011CB811402 and 2014CB744203. C.E.P. and S.J.E. are supported by the UK STFC. J.Z.
Sun, J.Q., Fang, C., Priest, E.R., Guo, Y., Edwards, S.J., Cheng, X., Parnell, C.E., Zhang, J., Ding, M.D., Chen, P.F.   +9 more
core   +1 more source

Heartbeat of the sun from principal component analysis and prediction of solar activity on a millenium timescale [PDF]

, 2015
We derive two principal components (PCs) of temporal magnetic field variations over the solar cycles 21-24 from full disk magnetograms covering about 39% of data variance, with σ = 0.67. These PCs are attributed to two main magnetic waves travelling from
Shepherd, Simon J., Zharkov, Sergei I., Zharkova, V. V., Zharkov, Sergei, Popova, E., Shepherd, S. J., Zharkova, Valentina, Shepherd, Simon, Zharkov, S. I., Popova, Elena, Zharkova, Valentina V.   +10 more
core   +1 more source

Magnetic particle spectroscopy in two-dimension mixing-frequency magnetic fields [PDF]

, 2023
Magnetic particle spectroscopy (MPS) is one of the most versatile tools to characterize the magnetic properties of magnetic nanoparticles (MNPs). The orientation, amplitude and frequency of excitation magnetic fields significantly affect the MPS signal ...
Zhong, Jing, Sun, Shijie, Sun, Shaoqi, Xu, Lijun, Zhang, Rui   +4 more
core