Results 11 to 20 of about 3,488,609 (297)

Measuring the magnetic fields in the chromospheres of low-mass stars [PDF]

Nature Communications
Magnetic fields in the upper atmospheres of solar-like stars are believed to provide an enormous amount of energy to power the hot coronae and drive large-scale eruptions that could impact the habitability of planetary systems around these stars. However,
Tianqi Cang, Pascal Petit, Jean-François Donati, Hui Tian, Jianning Fu, Hao Li, Stefano Bellotti, Xueying Hu, Xiaoyu Ma, Arturo Lopez Ariste, Keyu Xing, Julien Morin, Hongpeng Lu, Weikai Zong   +13 more
doaj   +3 more sources

The energy budget of stellar magnetic fields [PDF]

Monthly Notices of the Royal Astronomical Society, 2015
Spectropolarimetric observations have been used to map stellar magnetic fields, many of which display strong bands of azimuthal fields that are toroidal. A number of explanations have been proposed to explain how such fields might be generated though none are definitive.
See, V., Jardine, M., Vidotto, A. A., Donati, J. -F., Folsom, C. P., Saikia, S. Boro, Bouvier, J., Fares, R., Gregory, S. G., Hussain, G., Jeffers, S. V., Marsden, S. C., Morin, J., Moutou, C., Nascimento, J. D., Petit, P., Rosen, L., Waite, I. A.   +17 more
openaire   +8 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

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, Hideyuki Saio, Rafael A García, Simon J Murphy, Andreea I Henriksen, Donald W Kurtz, Hans Kjeldsen, Matteo Cantiello, Savita Mathur, Ângela R G Santos, Victoria Antoci   +24 more
core   +1 more source

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

Two-dimensional numerical experiments of convection. [PDF]

, 1996
PhDI report the results of numerical studies of 2-dimensional fully compressible convection of a fluid in which the dependence of the radiative conductivity on temperature T is taken as K, (V + aT -5)1 so that central regions of the layer are unstable ...
Simmons, John Christopher
core   +4 more sources

Magnetic Fields in Stellar Jets [PDF]

The Astrophysical Journal, 2007
Although 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 minor role in the dynamics at these locations. To investigate this apparent discrepancy we performed numerical simulations of
Hartigan, P., Frank, A., Varniere, P., Blackman, E.G.   +3 more
openaire   +4 more sources

The magnetic fields and stellar winds of the mature late F-stars: β Virginis and θ Draconis [PDF]

, 2021
International audienceMapping the large-scale magnetic field in late F-type stars is important for understanding the nature of the stellar dynamo and the dynamics of thin outer convection zones.
Folsom, C. P., Mengel, M. W., Neiner, C., Seach, J. M., Evensberget, D., Marsden, S. C., Carter, B. D., J M Seach, D Evensberget, S C Marsden, M W Mengel, B D Carter, C P Folsom, C Neiner   +13 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, Mackay, Duncan Hendry; id_orcid   +6 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