18 citations · 18 across the 6 of their papers we have counts for
6 papers · 1 filter
Synthetic Ca II 8542 Å Stokes Profile Associated with Chromospheric Magnetic Reconnection in a Simulated Active Region
Xinyu Zhou, Takaaki Yokoyama, Haruhisa Iijima +4
Magnetic reconnection is an important driving mechanism of many chromospheric phenomena, e.g., UV bursts and chromospheric jets. Information about magnetic field is indispensable f…
The Extreme Space Weather Event of 1872 February: Sunspots, Magnetic Disturbance, and Auroral Displays
Hisashi Hayakawa, Edward W. Cliver, Frédéric Clette +19
We review observations of solar activity, geomagnetic variation, and auroral visibility for the extreme geomagnetic storm on 1872 February 4. The extreme storm (referred to here as…
Investigation of non-equilibrium ionization plasma during a giant flare of UX Arietis triggered with MAXI and observed with NICER
Miki Kurihara, Wataru Buz Iwakiri, Masahiro Tsujimoto +7
We detected a giant X-ray flare from the RS-CVn type binary star UX Ari using MAXI on 2020 August 17 and started a series of NICER observations 89 minutes later. For a week, the en…
Persistent Homology analysis for solar magnetograms
Pablo Santamarina Guerrero, Yukio Katsukawa, Shin Toriumi +1
Understanding the magnetic fields of the Sun is essential for unraveling the underlying mechanisms driving solar activity. Integrating topological data analysis techniques into the…
Geocoronal Solar Wind Charge Exchange Process Associated with the 2006-December-13 Coronal Mass Ejection Event
Yu Zhou, Noriko Y. Yamasaki, Shin Toriumi +1
We report the discovery of a geocoronal solar wind charge exchange (SWCX) event corresponding to the well-known 2006 December 13th coronal mass ejection (CME) event. Strong evidenc…
Formulating Mass-Loss Rates for Sun-like Stars: A Hybrid Model Approach
Munehito Shoda, Steven R. Cranmer, Shin Toriumi
We observe an enhanced stellar wind mass-loss rate from low-mass stars exhibiting higher X-ray flux. This trend, however, does not align with the Sun, where no evident correlation…