Results 181 to 190 of about 1,478 (224)

Presolar Grains as Probes of Supernova Nucleosynthesis. [PDF]

Space Sci Rev
Liu N, Lugaro M, Leitner J, Meyer BS, Schönbächler M.   +4 more
europepmc   +1 more source

Chemical Evolution of Circumstellar Matter around Young Stellar Objects

Astrophysics and Space Science, 1995
Recent observational studies of the chemical composition of circumstellar matter around both high- and low-mass young stellar objects are reviewed. The molecular abundances are found to be a strong function of evolutionary state, but not of system mass or luminosity. The data are discussed with reference to recent theoretical models.
van Dishoeck, Ewine F., Blake, Geoffrey A.   +1 more
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Circumstellar matter and the nature of the SN1987A progenitor star

Nature, 1987
It is argued that radio observations of the supernova 1987A can be interpreted in terms of its interaction with circumstellar matter. The early turn-on of the radio emission implies a relatively low density circumstellar medium. The optical properties of the supernova imply that the progenitor star had a smaller radius than that of a typical type II ...
R. A. Chevalier, C. Fransson
openaire   +3 more sources

The interaction of supernova 2018evt with a substantial amount of circumstellar matter – An SN 1997cy-like event

Monthly Notices of the Royal Astronomical Society, 2022
A rare class of supernovae (SNe) is characterized by strong interaction between the ejecta and several solar masses of circumstellar matter (CSM) as evidenced by strong Balmer-line emission.
Yi Yang, Aleksandar Cikota, S Schulze
exaly   +2 more sources

Circumstellar Matter in Direct Impact Algol Systems

Astrophysics and Space Science, 1995
Full-orbit Hα observations have been analyzed to determine the two-dimensional distribution of the circumstellar gas in the four short-period Algols, U Sge, U CrB, RS Vul, and SW Cyg. In these systems, the gas stream resulting from Roche-lobe overflow directly impacts the mass-gaining star and feeds material into a structure known as a ‘transient ...
Geary E. Albright, Mercedes T. Richards
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Circumstellar matter in the symbiotic binary EG and

Astrophysics and Space Science, 1993
We present a quantitative model of a proposed common slowly expanding envelope corotating with a symbiotic binary system. The geometry of the envelope is defined by the equipotential surface containing the Lagrangian pointL 2. The model was applied to the symbiotic binary EG And.
A. Skopal, A. Vittone, L. Errico
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Circumstellar Matter in Selected Symbiotic Stars

Astrophysics and Space Science, 1995
A group of symbiotic binaries exhibits periodic variation in the optical continuum during orbital motion. It is suggested that this variation can be produced by different projection of the circumstellar matter, located in major part between the components of the binary, into the line of sight at different orbital phases.
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Extended Atmospheres and Circumstellar Matter in Spectroscopic Binary Systems

, 1973
The proposal to organize a Symposium on circumstellar matter and extended atmo spheres in binary systems was first made by the Dominion Astrophysical Observatory to the Executive Committee of the International Astronomical Union in the summer of 1969. It
Batten, Alan Henry(viaf)66719692edt, Batten, A   +1 more
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Modifications and erosion of circumstellar matter by wind particles

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1987
Erosion effects and chemical modifications induced by the bombardment of circumstellar solids by wind particles around low mass stars is considered. Two different evolutionary phases have been investigated: i) explosive phases, modelled as FU Orionis type bursts, during the contraction toward the main sequence; ii) the red giant stage in which stars ...
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Interaction of Supernovae with Circumstellar Matter

1990
Stars of essentially all masses are known to lose mass during their evolution. The mass loss characteristics at any time are determined by the evolutionary status of the star. The region around a star that is modified by these processes is referred to as the circumstellar medium.
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