Zobrazeno 1 - 10
of 264
pro vyhledávání: '"CAMERON, R. H."'
Publikováno v:
A&A 680, A42 (2023)
We investigate whether the Babcock-Leighton flux-transport dynamo model remains in agreement with observations if the meridional flow profile is taken from helioseismic inversions. Additionally, we investigate the effect of the loss of toroidal flux
Externí odkaz:
http://arxiv.org/abs/2309.17328
Publikováno v:
A&A 671, A87 (2023)
The length of the solar activity cycle fluctuates considerably. The temporal evolution of the corresponding cycle phase, that is, the deviation of the epochs of activity minima or maxima from strict periodicity, provides relevant information concerni
Externí odkaz:
http://arxiv.org/abs/2301.07469
Autor:
Nèmec, N. -E., Shapiro, A. I., Işık, E., Sowmya, K., Solanki, S. K., Krivova, N. A., Cameron, R. H., Gizon, L.
Surfaces of the Sun and other cool stars are filled with magnetic fields, which are either seen as dark compact spots or more diffuse bright structures like faculae. Both hamper detection and characterisation of exoplanets, affecting stellar brightne
Externí odkaz:
http://arxiv.org/abs/2207.06816
Publikováno v:
A&A 664, A183 (2022)
The twist of the magnetic field above a sunspot is an important quantity in solar physics. For example, magnetic twist plays a role in the initiation of flares and coronal mass ejections (CMEs). Various proxies for the twist above the photosphere hav
Externí odkaz:
http://arxiv.org/abs/2207.02135
Autor:
Jeffers, S. V., Cameron, R. H., Marsden, S. C., Saikia, S. Boro, Folsom, C. P., Jardine, M. M., Morin, J., Petit, P., See, V., Vidotto, A. A., Wolter, U., Mittag, M.
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 ac
Externí odkaz:
http://arxiv.org/abs/2201.07530
Publikováno v:
ApJ, 911, 71 (2021)
In the stellar chromospheres, radiative energy transport is dominated by only the strongest spectral lines. For these lines, the approximation of local thermodynamic equilibrium (LTE) is known to be very inaccurate, and a state of equilibrium cannot
Externí odkaz:
http://arxiv.org/abs/2104.13650
Autor:
Chaouche, L. Yelles, Cameron, R. H., Solanki, S. K., Riethmüller, T. L., Anusha, L. S., Witzke, V., Shapiro, A. I., Barthol, P., Gandorfer, A., Gizon, L., Hirzberger, J., van Noort, M., Rodríguez, J. Blanco, Iniesta, J. C. Del Toro, Suárez, D. Orozco, Schmidt, W., Pillet, V. Martínez, Knölker, M.
Publikováno v:
A&A 644, A44 (2020)
The solar photosphere provides us with a laboratory for understanding turbulence in a layer where the fundamental processes of transport vary rapidly and a strongly superadiabatic region lies very closely to a subadiabatic layer. Our tools for probin
Externí odkaz:
http://arxiv.org/abs/2010.09037
Autor:
Reinhold, T., Shapiro, A. I., Solanki, S. K., Montet, B. T., Krivova, N. A., Cameron, R. H., Amazo-Gómez, E. M.
This is our reply to the comment of T. Metcalfe and J. van Saders on the Science report "The Sun is less active than other solar-like stars" by T. Reinhold, A. I. Shapiro, S. K. Solanki, B. T. Montet, N. A. Krivova, R. H. Cameron, E. M. Amazo-Gomez.
Externí odkaz:
http://arxiv.org/abs/2007.04817
The relationship between vortex flows at different spatial scales and their contribution to the energy balance in the chromosphere is not yet fully understood. We perform three-dimensional (3D) radiation-magnetohydrodynamic (MHD) simulations of a uni
Externí odkaz:
http://arxiv.org/abs/2004.13996
Publikováno v:
A&A 637, A65 (2020)
Large-scale Rossby waves have recently been discovered from measurements of horizontal surface and near-surface solar flows (L\"optien at al. 2018). We are interested in understanding why only the sectoral modes are seen in the observations and also
Externí odkaz:
http://arxiv.org/abs/2003.05276