Results 21 to 30 of about 5,710 (349)

Modelling stellar coronal magnetic fields [PDF]

Proceedings of the International Astronomical Union, 2010
AbstractOur understanding of the structure and dynamics of stellar coronae has changed dramatically with the availability of surface maps of both star spots and also magnetic field vectors. Magnetic field extrapolations from these surface maps reveal surprising coronal structures for stars whose masses and hence internal structures and dynamo modes may
M. Jardine, J.‐F. Donati, D. Arzoumanian, A. A. Vidotto   +3 more
openalex   +3 more sources

Magnetic Fields in Stellar Jets [PDF]

The Astrophysical Journal, 2007
International audienceAlthough several lines of evidence suggest that jets from young stars are driven magnetically from accretion disks, existing observations of field strengths in the bow shocks of these flows imply that magnetic fields play only a ...
Hartigan, P., Frank, A., Varniere, P., Blackman, E.G.   +3 more
core   +5 more sources

Diagnosing large-scale stellar magnetic fields using PCA on spectropolarimetric data [PDF]

Monthly Notices of the Royal Astronomical Society, 2022
L T Lehmann, J -F Donati
exaly   +2 more sources

Observations of Cool-Star Magnetic Fields

Living Reviews in Solar Physics, 2012
Cool stars like the Sun harbor convection zones capable of producing substantial surface magnetic fields leading to stellar magnetic activity. The influence of stellar parameters like rotation, radius, and age on cool-star magnetism, and the importance ...
Ansgar Reiners
doaj   +2 more sources

Magnetic Fields of F-Type Stars [PDF]

, 2022
Magnetic fields are an observable feature of many stars, with warm, F-type stars of interest in searching for the transition from the fossil fields in hot stars to dynamos in cool stars driven by convection zones.
Seach, John M.
core   +1 more source

Rotational modulation in A and F stars: Magnetic stellar spots or convective core rotation? [PDF]

, 2023
The Kepler mission revealed a plethora of stellar variability in the light curves of many stars, some associated with magnetic activity or stellar oscillations.
Kurtz, Donald Wayne, Antoci, Victoria, García, Rafael A, Henriksen, Andreea I., Cantiello, Matteo, Santos, Ângela R. G., Kjeldsen, Hans, Murphy, Simon J, Kurtz, Donald W., Santos, Ângela R G, Murphy, Simon J., Henriksen, Andreea I, Saio, Hideyuki, García, Rafael A., Mathur, Savita   +14 more
core   +1 more source

Cosmology with inhomogeneous magnetic fields [PDF]

, 2007
We review spacetime dynamics in the presence of large-scale electromagnetic fields and then consider the effects of the magnetic component on perturbations to a spatially homogeneous and isotropic universe.
Roy Maartens, Christos G. Tsagas, Maartens, Roy, John D. Barrow, Tsagas, Christos G., Barrow, John D.   +5 more
core   +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

Constraints on Magnetic Braking from the G8 Dwarf Stars 61 UMa and τ Cet

The Astrophysical Journal Letters, 2023
During the first half of their main-sequence lifetimes, stars rapidly lose angular momentum to their magnetized winds, a process known as magnetic braking.
Travis S. Metcalfe, Klaus G. Strassmeier, Ilya V. Ilyin, Jennifer L. van Saders, Thomas R. Ayres, Adam J. Finley, Oleg Kochukhov, Pascal Petit, Victor See, Keivan G. Stassun, Sandra V. Jeffers, Stephen C. Marsden, Julien Morin, Aline A. Vidotto   +13 more
doaj   +1 more source

The magnetic fields of intermediate-mass T Tauri stars. I. Magnetic detections and fundamental stellar parameters [PDF]

, 2019
International audienceContext : .The origin of the fossil magnetic fields detected in 5 to 10% of intermediate-mass main sequence stars is still highly debated.
Johns-Krull, C., F. Gallet, Lebreton, Y.,, Johns-Krull, C.,, Bouvier, J.,, Petit, P., Haemmerlé, L., Böhm, T., T. Böhm, Charbonnel, C.,, J. Morin, Haemmerle, L.,, Marsden, S. C., Charbonnel, Corinne, Marsden, C., Morin, J., L. Haemmerlé, Kochukhov, Oleg,, Lebreton, Y., Petit, P.,, C. Charbonnel, Charbonnel, C., Alecian, E.,, Amard, L.,, Hussain, G.,, Alecian, E., Morin, J.,, Folsom, C. P.,, G. Hussain, S. C. Marsden, Folsom, C. P., P. Petit, Hussain, G., Amard, L., E. Alecian, C. Johns-Krull, Marsden, S. C.,, L. Amard, J. Bouvier, C. P. Folsom, Villebrun, F.,, Y. Lebreton, Bouvier, J., O. Kochukhov, Gallet, F.,, Folsom, C., Bohm, T.,, Villebrun, F., Gallet, F., Kochukhov, O., F. Villebrun   +50 more
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