From the 1 of 6 linked papers with an AI index.
6 papers
Radio Constraints on the Circumstellar Environment of the Type IIb Supernova SN 2024iss
Yuhei Iwata, Tomoki Matsuoka, Masanori Akimoto +6
Type~IIb supernovae exhibit diverse progenitor properties, and radio observations offer a unique probe of their mass-loss histories shortly before the explosion. We present Japanes…
Low-Frequency VLBI Network Using SKA-LOW
Hideyuki Kobayashi, Tomoaki Oyama, Kazuma Fujita +17
The paper proposes a low‑frequency (100–350 MHz) VLBI network that incorporates the Square Kilometre Array Low (SKA‑LOW) together with other high‑sensitivity radio telescopes in th…
VLBI-Enabled Localization of Continuous GW Sources
Keitaro Takahashi, Takuya Akahori, Kenta Fujisawa +8
Pulsar timing arrays (PTAs) are opening the nanohertz gravitational-wave (GW) band by timing millisecond pulsars (MSPs) to target signals from supermassive black hole binaries (SMB…
Periodic 6.7 GHz maser emission in G353.273+0.641: First candidate for a pulsating high-mass protostar
Sohta Harajiri, Kazuhito Motogi, Ryota Nakamura +3
We report on the periodic flux variations in the 6.7 GHz maser associated with the high-mass protostar G353.273+0.641, based on 13 yr of monitoring mainly by the…
Fast variability and circular polarization of the 6.7 GHz methanol maser in G33.6410.228
Kenta Fujisawa, Yui Sugiura, Yuta Kojima +5
The 6.7 GHz methanol maser in a high-mass star-forming region G33.6410.228 is known to exhibit burst-like flux variability due to an unknown mechanism. To investigate the burst…
Radio Follow-up Observations of SN 2023ixf by Japanese and Korean VLBIs
Yuhei Iwata, Masanori Akimoto, Tomoki Matsuoka +10
We report on radio follow-up observations of the nearby Type II supernova, SN 2023ixf, spanning from 1.7 to 269.9 days after the explosion, conducted using three very long baseline…