Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Lemerle, Alexandre"'
The dynamic activity of stars such as the Sun influences (exo)planetary space environments through modulation of stellar radiation, plasma wind, particle and magnetic fluxes. Energetic stellar phenomena such as flares and coronal mass ejections act a
Externí odkaz:
http://arxiv.org/abs/2303.12648
Publikováno v:
The Astrophysical Journal, 909:87 (12pp), 2021 March 1
The polar precursor method is widely considered to be the most robust physically motivated method to predict the amplitude of an upcoming solar cycle.It uses indicators of the magnetic field concentrated near the poles around sunspot minimum. Here, w
Externí odkaz:
http://arxiv.org/abs/2101.05013
Publikováno v:
J. Space Weather Space Clim. 2020,10,46
An algebraic method for the reconstruction and potentially prediction of the solar dipole moment value at sunspot minimum (known to be a good predictor of the amplitude of the next solar cycle) was suggested in the first paper in this series. The met
Externí odkaz:
http://arxiv.org/abs/2009.02300
Publikováno v:
Advances in Space Research, 2019, Volume 63, Issue 4, p. 1425-1433
The solar dipole moment at activity minimum is a good predictor of the strength of the subsequent solar cycle. Through a systematic analysis using a state-of-the-art 2$\times$2 D solar dynamo model, we found that bipolar magnetic regions (BMR) with a
Externí odkaz:
http://arxiv.org/abs/1909.07672
Autor:
Nagy, Melinda, Lemerle, Alexandre, Labonville, François, Petrovay, Kristóf, Charbonneau, Paul
Publikováno v:
Solar Physics, 2017, Volume 292, Issue 11, 22 pp
The origin of cycle-to-cycle variations in solar activity is currently the focus of much interest. It has recently been pointed out that large individual active regions with atypical properties can have a significant impact on the long term behaviour
Externí odkaz:
http://arxiv.org/abs/1712.02185
Autor:
Lemerle, Alexandre, Charbonneau, Paul
Publikováno v:
The Astrophysical Journal, Volume 834, Issue 2, article id. 133, 18 pp. (2017)
In this paper we complete the presentation of a new hybrid $2\times2$D flux transport dynamo (FTD) model of the solar cycle based on the Babcock-Leighton mechanism of poloidal magnetic field regeneration via the surface decay of bipolar magnetic regi
Externí odkaz:
http://arxiv.org/abs/1606.07375
Publikováno v:
The Astrophysical Journal, Volume 810, Issue 1, article id. 78, 18 pp. (2015)
The need for reliable predictions of the solar activity cycle motivates the development of dynamo models incorporating a representation of surface processes sufficiently detailed to allow assimilation of magnetographic data. In this series of papers
Externí odkaz:
http://arxiv.org/abs/1511.08548
Publikováno v:
Phys.Rev.Lett. 92 (2004) 081801
We present a method of obtaining the entire unitarity triangle from measurements of B -> pi K decay rates alone. Electroweak penguin amplitudes are included, and are related to tree operators. Discrete ambiguities are removed by comparing solutions w
Externí odkaz:
http://arxiv.org/abs/hep-ph/0309061
Publikováno v:
Journal of Space Weather and Space Climate, Vol 10, p 62 (2020)
We examine the impact of surface inflows into activity belts on the operation of solar cycle models based on the Babcock–Leighton mechanism of poloidal field regeneration. Towards this end we introduce in the solar cycle model of Lemerle & Charbonn
Externí odkaz:
https://doaj.org/article/7e3fee8b33fc4f8484198d911f0d5def
