Zobrazeno 1 - 10
of 117
pro vyhledávání: '"Leamon, Robert J."'
Autor:
McIntosh, Scott W., Leamon, Robert J.
The Sun exhibits episodic surges of magnetic activity across a range of temporal and spatial scales, the most prominent of which is the 11-ish year modulation of sunspot production. Beside the ~170 (min to max) decadal variation in sunspot production
Externí odkaz:
http://arxiv.org/abs/2408.10354
We previously identified an event in the solar timeline that appeared to play a role in how Sunspot Cycle 23 (SC23) transitioned into Sunspot Cycle 24 (SC24). The timeframe for this transition was rapid, taking place over a very short time and perhap
Externí odkaz:
http://arxiv.org/abs/2209.10577
Through meticulous daily observation of the Sun's large-scale magnetic field the Wilcox Solar Observatory (WSO) has catalogued two magnetic (Hale) cycles of solar activity. Those two (~22-year long) Hale cycles have yielded four ($\sim$11-year long)
Externí odkaz:
http://arxiv.org/abs/2208.09026
Autor:
McIntosh, Scott W., Leamon, Robert J., Egeland, Ricky, Dikpati, Mausumi, Altrock, Richard C., Banerjee, Dipankar, Chatterjee, Subhamoy, Srivastava, Abhishek K., Velli, Marco
We investigate the occurrence of the "extended solar cycle" (ESC) as it occurs in a host observational data spanning 140 years. Investigating coronal, chromospheric, photospheric and interior diagnostics we develop a consistent picture of solar activ
Externí odkaz:
http://arxiv.org/abs/2010.06048
Autor:
McIntosh, Scott W., Chapman, Sandra C., Leamon, Robert J., Egeland, Ricky, Watkins, Nicholas W.
The Sun exhibits a well-observed modulation in the number of spots on its disk over a period of about 11 years. From the dawn of modern observational astronomy sunspots have presented a challenge to understanding -- their quasi-periodic variation in
Externí odkaz:
http://arxiv.org/abs/2006.15263
We study the solar wind helium-to-hydrogen abundance's ($A_\mathrm{He}$) relationship to solar cycle onset. Using OMNI/Lo data, we show that $A_\mathrm{He}$ increases prior to sunspot number (SSN) minima. We also identify a rapid depletion and recove
Externí odkaz:
http://arxiv.org/abs/2006.04669
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Recent research has demonstrated the existence of a new type of solar event, the "terminator." Unlike the Sun's signature events, flares and Coronal Mass Ejections, the terminator most likely originates in the solar interior, at or near the tachoclin
Externí odkaz:
http://arxiv.org/abs/1909.06603
Autor:
Chatterjee, Subhamoy, Banerjee, Dipankar, McIntosh, Scott W., Leamon, Robert J., Dikpati, Mausumi, Srivastava, Abhishek K., Bertello, Luca
In the recent years there has been a resurgence of the study of Extended Solar Cycles (ESCs) through observational proxies mainly in Extreme Ultraviolet. But most of them are limited only to space-based era covering only about two solar cycles. Long-
Externí odkaz:
http://arxiv.org/abs/1903.03598
Autor:
McIntosh, Scott W., Leamon, Robert J., Egeland, Ricky, Dikpati, Mausumi, Fan, Yuhong, Rempel, Matthias
We observe the abrupt end of solar activity cycles at the Sun's equator by combining almost 140 years of observations from ground and space. These "terminator" events appear to be very closely related to the onset of magnetic activity belonging to th
Externí odkaz:
http://arxiv.org/abs/1901.09083