| Name: | PRIYANSH JASWAL |
| Affiliation: | Center of Excellence in Space Sciences India (CESSI), Indian Institute of Science Education and Research (IISER) Kolkata |
| Conference ID : | ASI2024_303 |
| Title : | Discovery of a relationship between the Sun’s dipole moment and the sunspot cycle: A novel extension to the Waldmeier effect |
| Authors : | Priyansh Jaswal, Chitradeep Saha, Dibyendu Nandy |
| Authors Affiliation: | 1 Priyansh Jaswal, Chitradeep Saha, Dibyendu Nandy (Center of Excellence in Space Sciences India, Indian Institute of Science Education and Research Kolkata, Mohanpur-741246, India)
2 Dibyendu Nandy (Department of Physical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur-741246, India) |
| Mode of Presentation: | Poster |
| Abstract Category : | Sun, Solar System, Exoplanets, and Astrobiology |
| Abstract : | Our nearest star, the Sun, exhibits variable magnetic activity which is of fundamental importance for planetary environments such as that of the Earth. On the Sun’s surface, strong magnetic fields buoyantly emerge from the interior creating relatively dark regions known as sunspots. The observed number of sunspots vary periodically creating a phenomena known as the solar cycle. Sunspots govern dynamic solar activity as well as the evolution of its large scale magnetic field which permeates the heliosphere. Sunspots also host energetic events like flares and coronal mass ejections that drive near-Earth space weather conditions. Due to this, understanding and forecasting the solar cycle is important. Based on large-scale magnetic field observations from the Wilcox Solar Observatory and an analysis of the long-term sunspot time series, we discover a – hitherto unappreciated – causal connection between the Sun’s dipole moment and the sunspot cycle, namely, the rate of decay of the Sun’s dipole moment is related to the rate of rise of the following sunspot cycle. This discovery provides a novel extension to the well known Waldmeier effect in solar activity and can be used to predict the amplitude and timing of sunspot cycles. |
