activity
20022025
most citedA state change in the low-mass X-ray binary XSS J12270-4859

259 citations · 3.6k across the 86 of their papers we have counts for

collaborators

87 papers

astro-ph.SR2025

TESS and ground-based observations of WZ Sge-type dwarf novae in outburst

Y. Tampo, N. Kojiguchi, K. Isogai +30

Dwarf nova (DN) superoutbursts are accompanied by superhumps, which change their periods and profiles over a superoutburst. We present the TESS and ground-based observations of nin…

astro-ph.EP2025★ 1 cited

KMT-2022-BLG-1818Lb,c: A Cold Super-Jupiter with a Saturn Sibling

Hongyu Li, Jiyuan Zhang, Cheongho Han +72

We present the discovery and analysis of the sixth microlensing two-planet system, KMT-2022-BLG-1818Lb,c, detected by a follow-up program targeting high-magnification events. Both…

astro-ph.SR2025

ASASSN-24hd; a dwarf nova bridging WZ Sge-type and SU UMa-type superoutbursts

Yusuke Tampo, Naoto Kojiguchi, Taichi Kato +9

WZ Sge-type dwarf novae (DNe) form a subclass in cataclysmic variables, characterized by short-period variations called superhumps during an outburst. Here we present optical groun…

astro-ph.SR2025★ 1 cited

V4141 Sgr: Outflows and repeated outbursts

Jaroslav Merc, Joanna Mikołajewska, Thomas Petit +6

In this work, we analyze the ongoing brightening of the poorly studied symbiotic star V4141 Sgr and examine its long-term variability. We present new low-resolution spectroscopic o…

astro-ph.SR2024

Optical and soft X-ray light-curve analysis during the 2022 eruption of U Scorpii: structural changes in the accretion disk

Katsuki Muraoka, Naoto Kojiguchi, Junpei Ito +52

We present our optical photometric observations of the 2022 eruption of the recurrent nova U Scorpii (U Sco) using 49,152 data points over 70 d following the optical peak. We have…

astro-ph.SR2023★ 1 cited

The Accretion History of EX Lup: A Century of Bursts, Outbursts, and Quiescence

Mu-Tian Wang, Gregory J. Herczeg, Hui-Gen Liu +11

EX Lup is the archetype for the class of young stars that undergoes repeated accretion outbursts of mag at optical wavelengths and that last for months. Despite extensive…