Results 191 to 200 of about 4,353 (222)

The Mineralogy of Interstellar and Circumstellar Dust

2003
The study of dust in space was for a long time hampered by the lack of resolution and wavelength coverage in the infrared. The launch of the Infrared Space Observatory (ISO) changed this dramatically. Its unprecedented wavelength range (2.4 - 200 μm) together with its relatively high spectral resolution (λ/Δλ = 2000–150) made this instrument ideal to ...
Frank J. Molster, Laurens B. F. M. Waters   +1 more
openaire   +1 more source

Properties of circumstellar dust in symbiotic Miras

2006
Symbiotic binaries with a cool Mira component are characterized by the presence of substantial dust and by the appearance of near-IR obscuration intervals. To understand such symbiotic Miras, their evolution, mutual interactions between the components and circumstellar matter, the influence of stellar winds and mass transfer mechanism, it is essential ...
Kotnik-Karuza, Dubravka, Jurkić, Tomislav   +1 more
openaire   +3 more sources

Circumstellar Dust Condensation Scenarios

Astrophysics and Space Science, 1997
Circumstellar dust condensation is a ubiquitously observed phenomenon. Its adequate physical description and quantitative theoretical modelling usually require i) the treatment of the microscopic grain formation processes, and ii) the simultaneous determination of the local physical and chemical conditions by calculating a consistent model structure of
openaire   +1 more source

Evidence for the circumstellar formation of dust

Astronomische Nachrichten, 1971
AbstractFrom an examination of the catalogue of early‐type stars by Neckel it follows that O stars generally have a mean circumstellar extinction AV = 0.89 ± 0.55 mag. On the basis of this result the consequences of the hypothesis are considered that all interstellar dust was formed in circumstellar regions in the process of star formation.
openaire   +1 more source

Dust production in circumstellar space

Astronomische Nachrichten, 1971
AbstractObservational indications which point out that the formation of dust particles in the circumstellar space usually accompanies the formation of most stars are discussed. An analytic treatment of circumstellar crushing processes leading to dust grains is presented.
openaire   +1 more source

Circumstellar Dust in Massive Stars

2010
We review observed properties of dust surrounding both hot and cool massive stars. The chemical composition of the dust provides information on the chemical and physical conditions at the time of dust formation, and the geometry of the dust envelope can be used to study the physics of the wind and the interaction between previous and current mass loss.
openaire   +1 more source

Structure and photochemistry of a potential precursor of circumstellar dust: The optical spectrum of Si4C2+

Journal of Molecular Spectroscopy, 2021
Marko Förstel, Kai Pollow, Taarna Studemund   +2 more
exaly  

Circumstellar Dust in Meteorites

Science, 2002
openaire   +1 more source

Properties of circumstellar silicate dust (Review)

Astronomische Nachrichten, 1989
J Gurtler, J Dörschner
exaly  

Circumstellar dust emission in five Large Magellanic Cloud supergiants

Monthly Notices of the Royal Astronomical Society, 1993
Patrick F Roche, David K Aitken, C H Smith   +2 more
exaly