101 citations · 855 across the 27 of their papers we have counts for
27 papers
Extended view on the dust shells around two carbon stars
M. Mečina, B. Aringer, W. Nowotny +4
Stars on the asymptotic giant branch (AGB) lose considerable amounts of matter through their dust-driven stellar winds. A number of such sources have been imaged by Herschel/PACS,…
Carbon stars with increased oxygen and nitrogen abundances: hydrostatic dust-free model atmospheres
Bernhard Aringer, Paola Marigo, Walter Nowotny +3
We have computed a grid of hydrostatic spherical COMARCS models for C stars covering metallicities from [Z/H]=0 to -2 and values of the carbon excess [C-O] from 6.41 to 9.15, plus…
Pulsation-induced atmospheric dynamics in M-type AGB stars. Effects on wind properties, photometric variations and near-IR CO line profiles
S. Liljegren, S. Höfner, K. Eriksson +1
Wind-driving in asymptotic giant branch (AGB) stars is commonly attributed to a two-step process. First, matter in the stellar atmosphere is levitated by shock waves, induced by st…
Aperture synthesis imaging of the carbon AGB star R Sculptoris: Detection of a complex structure and a dominating spot on the stellar disk
M. Wittkowski, K. -H. Hofmann, S. Höfner +16
We present near-infrared interferometry of the carbon-rich asymptotic giant branch (AGB) star R Sculptoris. The visibility data indicate a broadly circular resolved stellar disk wi…
The adventure of carbon stars - Observations and modelling of a set of C-rich AGB stars
Gioia Rau, Josef Hron, Claudia Paladini +5
Modeling stellar atmospheres is a complex, intriguing task in modern astronomy. A systematic comparison of models with multi-technique observations is the only efficient way to con…
Dust-driven winds of AGB stars: The critical interplay of atmospheric shocks and luminosity variations
S. Liljegren, S. Höfner, W. Nowotny +1
Winds of AGB stars are thought to be driven by a combination of pulsation-induced shock waves and radiation pressure on dust. In dynamic atmosphere and wind models, the stellar pul…