588 citations · 3.7k across the 116 of their papers we have counts for
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Silicon isotopic abundance toward evolved stars and its application for presolar grains
T. -C. Peng, E. M. L. Humphreys, L. Testi +8
Galactic chemical evolution (GCE) is important for understanding the composition of the present-day interstellar medium (ISM) and of our solar system. In this paper, we aim to trac…
VLA survey of the 22 GHz H2O masers toward 10 silicate carbon stars
K. Ohnaka, D. A. Boboltz, G. Mulitz-Schimel +2
Despite their carbon-rich photospheres, silicate carbon stars show evidence of oxygen-rich circumstellar material, which is considered to exist in disks. Silicate carbon stars repr…
New insights into the dust formation of oxygen-rich AGB stars
I. Karovicova, M. Wittkowski, K. Ohnaka +3
We observed the AGB stars S Ori, GX Mon and R Cnc with the MIDI instrument at the VLTI. We compared the data to radiative transfer models of the dust shells, where the central stel…
ALMA observations of the variable 12CO/13CO ratio around the asymptotic giant branch star R Sculptoris
W. H. T. Vlemmings, M. Maercker, M. Lindqvist +7
[abridged] The 12CO/13CO ratio is often used as a measure of the 12C/13C ratio in the circumstellar environment, carrying important information about the stellar nucleosynthesis. E…
The atmospheric structure and fundamental parameters of the red supergiants AH Sco, UY Sct and KW Sgr
B. Arroyo-Torres, M. Wittkowski, J. M. Marcaide +1
We present the atmospheric structure and the fundamental properties of the red supergiants (RSGs) AH Sco, UY Sct, and KW Sgr based on VLTI/AMBER observations. We carried out spectr…