Exploring the Quenching of Bipolar Magnetic Region Tilts using AutoTAB
arxiv(2024)
摘要
The tilt of the bipolar magnetic region (BMR) is crucial in the
Babcock-Leighton process for the generation of the poloidal magnetic field in
the Sun. We extend the work of Jha et al. (2020) and analyze the recently
reported tracked BMR catalogue based on AutoTAB Sreedevi et al. (2023) from
Michelson Doppler Imager (1996-2011) and Helioseismic and Magnetic Imager
(2010-2018). Using the tracked information of BMRs based on AutoTAB, we confirm
that the distribution of bmax reported by Jha et al. (2020) is not because of
the BMRs are picked multiple times at the different phases of their evolution
instead it is also present if we consider each BMRs only once. Moreover, we
find that the slope of Joy's law initially increases slowly with the increase
of bmax. However, when bmax>2.5 kG, gamma_0 decreases. The decrease of observed
gamma_0 with bmax provides a hint to a nonlinear tilt quenching in the
Babcock-Leighton process.
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