Search Publications
Linking dust emission to fundamental properties in galaxies: the low-metallicity picture
Ciesla, L.; Cooray, A.; Lebouteiller, V. +15 more
Aims: In this work, we aim to provide a consistent analysis of the dust properties from metal-poor to metal-rich environments by linking them to fundamental galactic parameters.
Methods: We consider two samples of galaxies: the Dwarf Galaxy Survey (DGS) and the Key Insights on Nearby Galaxies: a Far-Infrared Survey with Herschel (KINGFIS…
Exploring wind-driving dust species in cool luminous giants. III. Wind models for M-type AGB stars: dynamic and photometric properties
Eriksson, K.; Höfner, S.; Aringer, B. +1 more
Context. Stellar winds observed in asymptotic giant branch (AGB) stars are usually attributed to a combination of stellar pulsations and radiation pressure on dust. Shock waves triggered by pulsations propagate through the atmosphere, compressing the gas and lifting it to cooler regions which creates favourable conditions for grain growth. If suff…
Dusty wind of W Hydrae. Multi-wavelength modelling of the present-day and recent mass loss
Waters, L. B. F. M.; de Koter, A.; Decin, L. +5 more
Context. Low- and intermediate-mass stars go through a period of intense mass-loss at the end of their lives, during the asymptotic giant branch (AGB) phase. While on the AGB a significant part, or even most, of their initial mass is expelled in a stellar wind. This process controls the final stages of the evolution of these stars and contributes …
Herschel observations of extreme OH/IR stars. The isotopic ratios of oxygen as a sign-post for the stellar mass
Waters, L. B. F. M.; Olofsson, H.; Blommaert, J. +10 more
Aims: The late stages of stellar evolution are mainly governed by the mass of the stars. Low- and intermediate-mass stars lose copious amounts of mass during the asymptotic giant branch (AGB) which obscure the central star making it difficult to study the stellar spectra and determine the stellar mass. In this study, we present observational …
Modelling the atmosphere of the carbon-rich Mira RU Virginis
Groenewegen, M. A. T.; Hron, J.; Paladini, C. +3 more
Context. We study the atmosphere of the carbon-rich Mira
Aims: The aim of this work is to analyse the atmosphere of the carbon-rich Mira RU Vir with hydrostatic and dynamic models, in this way deepening the knowledge of the dy…
Micron-sized forsterite grains in the pre-planetary nebula of IRAS 17150-3224. Searching for clues to the mysterious evolution of massive AGB stars
Waters, L. B. F. M.; Blommaert, J. A. D. L.; Min, M. +3 more
Aims: We study the grain properties and location of the forsterite crystals in the circumstellar environment of the pre-planetary nebula (PPN) IRAS 17150-3224 in order to learn more about the as yet poorly understood evolutionary phase prior to the PPN.
Methods: We use the best-fit model for IRAS 17150-3224 of Meixner et al. (2002, ApJ, …
Kinematic and thermal structure at the onset of high-mass star formation
Henning, Th.; Krause, O.; Beuther, H. +6 more
Context. Even though high-mass stars are crucial for understanding a diversity of processes within our galaxy and beyond, their formation and initial conditions are still poorly constrained.
Aims: We want to understand the kinematic and thermal properties of young massive gas clumps prior to and at the earliest evolutionary stages of high-mas…
Absorption of crystalline water ice in the far infrared at different temperatures
Krivov, A. V.; Löhne, T.; Mutschke, H. +2 more
The optical properties of ice in the far infrared are important for models of protoplanetary and debris disks. In this report, we derive a new set of data for the absorption (represented by the imaginary part of the refractive index κ) of crystalline water ice in this spectral range. The study includes a detailed inspection of the temperature depe…