Results 51 to 60 of about 301,064 (245)
Molecular abundances in carbon-rich circumstellar envelopes [PDF]
Astrophysics and Space Science, 1995 Millimetre observations of three southern carbon stars, IRAS 07454-7112, IRAS 15082-4808 and IRAS 15194-5115 detected 14 molecular species and some of their isotopomers. The12C/13C ratio was found to vary between sources.
L.-Å Nyman, H. Olofsson
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TYPE I SUPERLUMINOUS SUPERNOVAE AS EXPLOSIONS INSIDE NON-HYDROGEN CIRCUMSTELLAR ENVELOPES [PDF]
, 2015 A number of Type I (hydrogenless) superluminous supernova (SLSN) events have been discovered recently. However, their nature remains debatable. One of the most promising ideas is the shock interaction mechanism, but only simplified semi-analytical models
E. Sorokina +4 more
semanticscholar +1 more source
The Astrophysical Journal, 2023 We obtained accurate vibrational frequencies, rotational constants, and vertical transition energy for AlNH _2 (X ^1 A _1 ) and HAlNH(X ^1 A′) isomers using ab initio calculations at various levels of theory.
Tarek Trabelsi +2 more
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A Review of AGB Mass Loss Imaging Techniques [PDF]
, 2009 Circumstellar imaging, across the electromagnetic spectrum, allows to derive fundamental diagnostics for the physics of mass loss in the AGB phase. I review the current status of the field, with particular emphasis on the techniques that provide the ...
Bontekoe +70 more
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A sensitive line search in circumstellar envelopes [PDF]
The Astrophysical Journal, 1988 AbstractA molecular line search in the range between 85 and 89 GHz has been performed in the circumstellar envelopes of 11 evolved stars. Emissions of 29SiO J=2−1,28SiO J=2−1, HCN J=1−0, H13CN J=1−0, HC5 N J=33−32, HCO+ J=1−0 transitions and other transitions of C2 H, C4 H, and C3 N have been observed in 11 stars.
null Nguyen-Q-Rieu +6 more
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The detection of heavy metals in the circumstellar envelopes of post-AGB stars [PDF]
, 2015 A new kind of peculiarity is discussed: splitting or asymmetry of strong absorption lines in the optical spectra of selected post-AGB stars with carbon envelopes and atmospheres enriched in carbon and s-process heavy metals.
V. Klochkova, V. Panchuk
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Atomic and molecular hydrogen in the circumstellar envelopes of late-type stars
Monthly Notices of the Royal Astronomical Society, 1983 A. Glassgold, P. Huggins
semanticscholar +3 more sources
Asymptotic giant branch stars in the Large Magellanic Cloud: evolution of dust in circumstellar envelopes [PDF]
, 2014 We calculated theoretical evolutionary sequences of asymptotic giant branch (AGB) stars, including formation and evolution of dust grains in their circumstellar envelope.
F. Dell’Agli +6 more
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AGB Stars and Their Circumstellar Envelopes: An Operative Approach to Computing Their Atmospheres
Universe, 2021 The study of AGB stars necessarily covers a wide range of topics, from the primary astronomical observations to their interpretation in terms of fundamental physics.
Lucio Crivellari +2 more
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Deep optical imaging of asymptotic giant branch circumstellar envelopes [PDF]
, 2013 We report results of a program to image the extended circumstellar envelopes of asymptotic giant branch (AGB) stars in dust-scattered Galactic light. The goal is to characterize the shapes of the envelopes to probe the mass-loss geometry and the presence
N.Mauron, P. Huggins, C. Cheung
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