254 citations · 2.5k across the 66 of their papers we have counts for
67 papers
The variable mass-loss in low-mass red giant stars: Chromospheric motion across stellar evolution in 47 Tuc
Ian Baeza, L. Monaco, H. Frelijj +8
Mass-Loss (ML) is a critical process that remains poorly understood despite its broad implications across astrophysics. Our current knowledge is insufficient to reproduce ML consis…
Red Giant Winds Driven by Alfvén Waves with Magnetic Diffusion
Takeru K. Suzuki, Keiichi Ohnaka, Yuki Yasuda
We investigate the driving mechanism of Alfvén wave-driven stellar winds from red giant stars, Arcturus ( Boo; K1.5 III) and Aldebaran ( Tau; K5 III), with nonideal MHD simul…
Spatially resolving the AGB star V3 in the metal-poor globular cluster 47 Tuc with VLTI/GRAVITY
Keiichi Ohnaka, Gerd Weigelt, Karl-Heinz Hofmann +1
Mass loss at the asymptotic giant branch (AGB) plays an important role not only in the final fates of stars, but also in the chemical evolution of galaxies. Nevertheless, the metal…
Spatially resolved mid-infrared observations of the circumstellar environment of the born-again object FG Sge
K. Ohnaka, B. A. Jara Bravo
FG Sge has evolved from the hot central star of the young planetary nebula Hen 1-5 to a G-K supergiant in the last 100 years. It is one of the three born-again objects that has bee…
VLTI-MATISSE L- and N-band aperture-synthesis imaging of the unclassified B[e] star FS Canis Majoris
K. -H. Hofmann, A. Bensberg, D. Schertl +58
Context: FS Canis Majoris (FS CMa, HD 45677) is an unclassified B[e] star surrounded by an inclined dust disk. The evolutionary stage of FS CMa is still debated. Perpendicular to t…
Infrared interferometric imaging of the compact dust disk around the AGB star HR3126 with the bipolar Toby Jug Nebula
Keiichi Ohnaka, Dieter Schertl, Karl-Heinz Hofmann +1
The asymptotic giant branch (AGB) star HR3126, associated with the arcminute-scale bipolar Toby Jug Nebula, provides a rare opportunity to study the emergence of bipolar structures…