Results 11 to 20 of about 30,680 (264)

The Magnetic Field Inside the Sun [PDF]

Symposium - International Astronomical Union, 1988
Duvall, Harvey and Pomerantz (1986) reported the existence of a ‘structural asymmetry’ inside the Sun. We show that this asymmetry is not a consequence of the Sun's rotation. We attribute the asymmetry, rather, to a toroidal magnetic field inside the Sun.
W. Dziembowski, Philip R. Goode
openaire   +1 more source

The Sun's General Magnetic Field [PDF]

Nature, 1956
SOME of the recent theoretical discussions of the magnetic field of the Sun have tended to throw the subject into a state of confusion1–3. In particular, H. Alfven3 asserts that “… it is at present impossible to derive a value of the sun's general magnetic field from spectroscopic measurements”, and that “quite without justification it is assumed that ...
H. ALFVÉN, B. LEHNERT
  +6 more sources

The toroidal magnetic field inside the Sun [PDF]

International Astronomical Union Colloquium, 1991
Analysis of the fine structure of the solar oscillations has enabled us to determine the internal rotation of the Sun and to estimate the magnitude of the large-scale magnetic field inside the Sun. According to the data of Duvall et al. (1984), the core of the Sun rotates about twice as fast as the solar surface. Recently Dziembowski et al. (1989) have
V.N. Krivodubskij, A.E. Dudorov, A.A. Ruzmaikin, T.V. Ruzmaikina   +3 more
openaire   +1 more source

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

The Sun's global magnetic field [PDF]

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2012
Our present-day understanding of solar and stellar magnetic fields is discussed from both an observational and theoretical viewpoint. To begin with, observations of the Sun's large-scale magnetic field are described, along with recent advances in measuring the spatial distribution of magnetic fields on other stars.
openaire   +2 more sources

THE EMERGENCE OF WEAKLY TWISTED MAGNETIC FIELDS IN THE SUN [PDF]

The Astrophysical Journal, 2013
We have studied the emergence of a weakly twisted magnetic flux tube from the upper convection zone into the solar atmosphere. It is found that the rising magnetized plasma does not undergo the classical, single Ω-shaped loop emergence, but it becomes unstable in two places, forming two magnetic lobes that are anchored in small-scale bipolar structures
Archontis, Vasilis, Hood, Alan William, Tsinganos, K   +2 more
openaire   +4 more sources

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
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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
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Mapping the Hidden Magnetic Field of the Quiet Sun [PDF]

The Astrophysical Journal Letters, 2021
Abstract The Sun is the only star where we can resolve the intricate magnetism that all convective stars harbor. Yet, more than 99% of its visible surface along the solar cycle (the so-called quiet Sun) is filled with a tangled, unresolved magnetism.
J. C. Trelles Arjona, M. J. Martínez González, B. Ruiz Cobo   +2 more
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