Results 221 to 230 of about 301,064 (245)

On the shaping of circumstellar envelopes

Publications of the Astronomical Society of the Pacific, 1992
In this paper, we examine the evolutionary process of expansion of a magnetized ring of cool matter ejected from a Red Giant. The subsequent formation of a circumstellar shell or preplanetary nebula is also analyzed. The velocity, density and magnetic field are calculated along a time-sequence, on a large two-dimensional grid of points close to and far
G. Pascoli, J. Leclercq, B. Poulain
openaire   +1 more source

Chemistry in Expanding Circumstellar Envelopes

1988
This review is concerned with the chemistry occurring in the. expanding envelopes around cool, late-type stars. We show that, although many different chemical processes help determine the overall chemical composition of such envelopes, the detailed composition, as evidenced by the many molecules detected at radio wavelengths, is best explained by a ...
openaire   +1 more source

Pyrene synthesis in circumstellar envelopes and its role in the formation of 2D nanostructures

Nature Astronomy, 2018
Long Zhao, R. Kaiser, Bo Xu, U. Ablikim, Musahid Ahmed, D. Joshi, Gregory Veber, F. Fischer, A. Mebel   +8 more
semanticscholar   +1 more source

Interferometric Measurements of Flattend Circumstellar Envelopes

International Astronomical Union Colloquium, 1979
AbstractAn incoherent spatial interferometer has been used to measure the shapes of circumsteliar dust envelopes at infrared wavelengths. The objects IRC +10216, VY CMa, and NML Cyg exhibit a large variation of fringe visibility with position angle Their circumstellar envelopes are probably flattened disks.
openaire   +1 more source

Atmospheric molecular blobs shape up circumstellar envelopes of AGB stars

Nature, 2023
Luis Velilla Prieto, Jose Pablo Fonfría, Guillermo Quintana-Lacaci   +2 more
exaly  

Thermal Radio Emission from Circumstellar Envelopes

1985
The field of thermal radio star research between 1970 and 1984 is reviewed. The impact of Very Large Array telescope on high-resolution studies of stellar sources and the theoretical interpretation of the observations are discussed.
openaire   +1 more source

Circumstellar Envelopes

2004
openaire   +1 more source

Circumstellar envelopes

2008
openaire   +1 more source

Circumstellar Envelopes and Mass Loss of Red Giant Stars

, 1975
D. Reimers
semanticscholar   +1 more source

Isotopes in the interstellar medium and circumstellar envelopes

, 1999
T. Wilson
semanticscholar   +1 more source