activity
20232026
most citedAPO & SMARTS flare star campaign observations I. Blue wing asymmetries in chromospheric lines during mid M dwarf flares from simultaneous spectroscopic and photometric observation data

41 citations · 86 across the 14 of their papers we have counts for

collaborators
Showing 2024Show all

5 papers · 1 filter

astro-ph.HE2024

Detection of extended X-ray emission around the PeVatron microquasar V4641 Sgr with XRISM

Hiromasa Suzuki, Naomi Tsuji, Yoshiaki Kanemaru +26

A recent report on the detection of very-high-energy gamma rays from V4641 Sagittarii (V4641 Sgr) up to ~0.8 peta-electronvolt has made it the second confirmed "PeVatron" microquas…

astro-ph.SR2024★ 1 cited

Rising Near-Ultraviolet Spectra in Stellar Megaflares

Adam F. Kowalski, Rachel A. Osten, Yuta Notsu +5

Flares from M-dwarf stars can attain energies up to times larger than solar flares but are generally thought to result from similar processes of magnetic energy release and…

astro-ph.SR2024

Multiwavelength Campaign Observations of a Young Solar-type Star, EK Draconis. II. Understanding Prominence Eruption through Data-Driven Modeling and Observed Magnetic Environment

Kosuke Namekata, Kai Ikuta, Pascal Petit +15

EK Draconis, a nearby young solar-type star (G1.5V, 50-120 Myr), is known as one of the best proxies for inferring the environmental conditions of the young Sun. The star frequentl…

astro-ph.SR2024

A long-duration superflare on the K giant HD 251108

Hans Moritz Günther, Dheeraj Pasham, Alexander Binks +10

Many giant stars are magnetically active, which causes rotational variability, chromospheric emission lines, and X-ray emission. Large outbursts in these emission features can set…

astro-ph.SR2024

High-velocity blue-shifted Fe XXV He line during a superflare of the RS CVn-type star IM Peg

Shun Inoue, Wataru Buz Iwakiri, Teruaki Enoto +8

Monitor of All-sky X-ray Image (MAXI) detected a superflare, releasing erg in 210 keV, of the RS CVn-type star IM Peg at 10:41 UT on 2023 July 23 with its Gas…