Silke Maes

MACE: a Machine-learning Approach to Chemistry Emulation

Silke Maes, Frederik De Ceuster, Marie Van de Sande, L. Decin

Astrochemistry is the study of chemical species in astrophysical objects.By combining observations and theoretical predictions, the physical conditions of the object can be analysed as well as its chemical composition and yields, since chemistry is closely coupled to the dynamics of the …

ru, be, nl, gb (code pays fourni par la source)

SPH modelling of AGB wind morphology in hierarchical triple systems \& comparison to observation of R Aql

Jolien Malfait, L. Siess, O. Vermeulen, M. Esseldeurs et autres

Asymmetric 3D structures are observed in the outflows of evolved low- and intermediate-mass stars, and are believed to be shaped through the interaction of companions that are hidden within the dense wind. We investigate how triple systems can shape the outflow of …

MACE: A Machine-learning Approach to Chemistry Emulation

Silke Maes, Frederik De Ceuster, Marie Van de Sande, L. Decin

Abstract The chemistry of an astrophysical environment is closely coupled to its dynamics, the latter often found to be complex. Hence, to properly model these environments a 3D context is necessary. However, solving chemical kinetics within a 3D hydro simulation is computationally …

MACE: A Machine learning Approach to Chemistry Emulation

Silke Maes, F. De Ceuster, Marie Van de Sande, L. Decin

The chemistry of an astrophysical environment is closely coupled to its dynamics, the latter often found to be complex. Hence, to properly model these environments a 3D context is necessary. However, solving chemical kinetics within a 3D hydro simulation is computationally infeasible …

Chemical tracers of a highly eccentric AGB–main-sequence star binary

T. Danilovich, Jolien Malfait, Marie Van de Sande, M. Montargès et autres

au, ru, be, gb, fr, us, se, de, nl, th (code pays fourni par la source)

ATOMIUM: Molecular inventory of 17 oxygen-rich evolved stars observed with ALMA

S. H. J. Wallström, T. Danilovich, Holger S P Müller, C. A. Gottlieb et autres

Context.The dusty winds of cool evolved stars are a major contributor of the newly synthesised material enriching the Galaxy and future generations of stars. However, the details of the physics and chemistry behind dust formation and wind launching have yet to be …

us, be, de, gb, fr, sk, nl, cl, se, th (code pays fourni par la source)

Sensitivity study of chemistry in AGB outflows using chemical kinetics

Silke Maes, Marie Van de Sande, T. Danilovich, Frederik De Ceuster et autres

ABSTRACT Asymptotic giant branch (AGB) stars shed a significant amount of their mass in the form of a stellar wind, creating a vast circumstellar envelope (CSE). Owing to the ideal combination of relatively high densities and cool temperatures, CSEs serve as rich …

be, gb, au (code pays fourni par la source)

3D simulations of AGB stellar winds

M. Esseldeurs, L. Siess, Frederik De Ceuster, W. Homan et autres

Context. Stars with an initial mass below ~8 M ⊙ evolve through the asymptotic giant branch (AGB) phase, during which they develop a strong stellar wind, due to radiation pressure on newly formed dust grains. Recent observations have revealed significant morphological complexities …

be (code pays fourni par la source)

3D simulations of AGB stellar winds -- II. Ray-tracer implementation and impact of radiation on the outflow morphology

M. Esseldeurs, L. Siess, Frederik De Ceuster, W. Homan et autres

Stars with an initial mass below ~ 8 Msun evolve through the asymptotic giant branch (AGB) phase, during which they develop strong stellar winds. Recent observations have revealed significant morphological complexities in their outflows, most likely caused by a companion. We study …

Chemical tracers of a highly eccentric binary orbit

T. Danilovich, Jolien Malfait, Marie Van de Sande, M. Montargès et autres

au, ru, be, gb, fr, us, se, de, nl, th (code pays fourni par la source)

The VLT/SPHERE view of the ATOMIUM cool evolved star sample

M. Montargès, Emily Cannon, A. de Koter, T. Khouri et autres

Context. Low- and intermediate-mass asymptotic giant stars and massive red supergiant stars are important contributors to the chemical enrichment of the Universe. They are among the most efficient dust factories of the Galaxy, harboring chemically rich circumstellar environments. Yet, the processes that …

fr, ru, be, nl, se, gb, us, th, de (code pays fourni par la source)

The VLT/SPHERE view of the ATOMIUM cool evolved star sample. I. Overview: Sample characterization through polarization analysis

M. Montargès, E. Cannon, A. de Koter, T. Khouri et autres

Aims. Through the ATOMIUM project, based on an ALMA large program, we aim to present a consistent view of a sample of 17 nearby cool evolved stars (Aymptotic Giant Branch and red supergiant stars). Methods. Here we present VLT/SPHERE-ZIMPOL polarimetric maps obtained …