3 papers
astro-ph.GA2024
Windy or not: Radio pc-scale evidence for a broad-line region wind in radio-quiet quasars
Sina Chen, Ari Laor, Ehud Behar +6
Does a broad-line region (BLR) wind in radio-quiet (RQ) active galactic nuclei (AGN) extend to pc scales and produce radio emission? We explore the correlations between a pc-scale…
astro-ph.GA2023
Implication of the period-magnitude relation for massive AGB stars and its astronomical applications
Akiharu Nakagawa, Tomoharu Kurayama, Hiroshi Sudou +1
We present astrometric very long baseline interferometry (VLBI) studies of AGB stars. To understand the properties and evolution of AGB stars, distances are an important parameter.…
astro-ph.GA2023
Astrometric VLBI observations of HO masers in an extreme OH/IR star candidate NSV17351
Akiharu Nakagawa, Atsushi Morita, Nobuyuki Sakai +14
Results of astrometric very long baseline interferometry (VLBI) observations towards an extreme OH/IR star candidate NSV17351 are presented. We used the VERA (VLBI Exploration of R…