Results 41 to 50 of about 4,364 (222)
Molecular catastrophes and the formation of circumstellar dust [PDF]
Symposium - International Astronomical Union, 1987 Radiative instabilities due to simple molecules may convert chromospheric material into masering molecules and dust capable of being removed from the star by radiation pressure.
openaire +2 more sources
Circumstellar dust shells around long-period variables [PDF]
, 2001 The existence of warm zones of an enhanced molecular content surrounding the photospheres of AGB stars has been postulated to explain observed molecular absorption/emission components which are in excess of the results obtained from classical hydrostatic
J. M. Winters +3 more
core +1 more source
The Astrophysical Journal, 2023 Dust coagulation in protoplanetary disks is not straightforward and is subject to several slowdown mechanisms, such as bouncing, fragmentation, and radial drift to the star.
Vitaly Akimkin +4 more
doaj +1 more source
Characteristics of Interstellar and Circumstellar Dust [PDF]
International Astronomical Union Colloquium, 1991 Abstract: This paper reviews our current knowledge of interstellar and circumstellar dust from an observational point of view. It is concluded that interstellar dust is highly heterogenous. It consist of a large number of different materials formed in a great variety of stellar birthsites under varying conditions and each with a highly isotopically ...
openaire +1 more source
A search for circumstellar dust disks with ADONIS [PDF]
, 2004 We present results of a coronographic imaging search for circumstellar dust disks with the Adaptive Optics Near Infrared System (ADONIS) at the ESO 3.6 m telescope in La Silla (Chile).
Boehnhardt, H. +15 more
core +1 more source
Non-stoichiometric amorphous magnesium-iron silicates in circumstellar dust shells [PDF]
, 2020 Aims. We study the growth of dust in oxygen-rich stellar outflows in order to find out to which extent dust growth models can quantitatively reconcile with the quantities and nature of dust as derived from observations of the infrared emission from ...
Akemi Tamanai +3 more
core +1 more source
Laboratory Astrophysics of Circumstellar Dust [PDF]
Symposium - International Astronomical Union, 1999 This paper summarizes laboratory investigations of Stardust analogue materials with special emphasis on the spectroscopic behaviour of silicates and carbonaceous materials. The review will also deal with the identification of the observed features in the dust spectra of AGB stars.
openaire +1 more source
Confined Chemistry in Space: Zeolite‐Supported Fe13 Nanoclusters Modulate CS Reactivity
Small Structures, Volume 7, Issue 3, March 2026.The study explores how an Fe13 cluster confined in chabazite reshapes the reaction of CS and H2 under astrochemical conditions. Confinement promotes C–S bond cleavage over hydrogenation, directing chemistry toward CH4 and H2S formation. Additional CS enables CS2 and C2 species. Microkinetic analysis identifies protoplanetary environments where zeolites
Gerard Pareras, Albert Rimola
wiley +1 more source
Modelling and observations of molecules in discs around young stars [PDF]
, 2013 This thesis contains a study of molecules within circumstellar discs around young stars. Firstly, the chemistry of a disc around a young, Class 0 protostar is modelled.
Ilee, John David
core
Perturbations of two planets on the dust component of a circumstellar disk [PDF]
, 2022 I pianeti si formano in dischi circumstellari costituiti di gas e polveri. L’interazione fra il disco e i pianeti dà luogo a caratteristiche peculiari nel disco, come gaps e anelli. Strumenti come ALMA e SPHERE possono rilevare tali caratteristiche. In
Marangoni, Andrea
core