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astro-ph.SR2026
SiO Maser Line-width Diagnostics of AGB Stars and Red Supergiants: The RSG-adjacent Region in the FWZI--Luminosity Plane
Qiu-Yu Tao, Jun-ichi Nakashima, Yong Zhang +3
We investigate whether SiO maser line profiles can distinguish asymptotic giant branch (AGB) stars from red supergiants (RSGs) and identify unusual AGB-classified sources near the…
astro-ph.SR2026
HI envelope around the carbon star V420 Vul
Xu-Jia Ouyang, Yong Zhang, Chuan-Peng Zhang +1
We report the detection of an extended 21-cm parsec-scale \ion{H}{i} structure toward the Mira variable V420\,Vul using archival Galactic Arecibo L-band Feed Array survey data. The…