Results 181 to 190 of about 3,169 (205)
Gas infall and possible circumstellar rotation in R Leonis [PDF]
Astronomy and Astrophysics, 2019 We present new interferometer molecular observations of R Leo taken at 1.2 mm with the Atacama Large Millimeter Array with an angular resolution up to ≃0.″026. These observations permitted us to resolve the innermost envelope of this star, which revealed a complex structure that involves extended continuum emission and molecular emission showing a non ...
J P Fonfria +2 more
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The circumstellar gas of sigma orionis E
Astrophysics and Space Science, 1985In order to explain the variable Hα emission and the eclipse-like light variation of σ Ori E, we investigated the circumstellar gas trapped by the stellar magnetic field and corotating with the star. By considering the potential along the magnetic field line, we found that the gas concentrates to a potential minimum.
R Nakajima
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Annual Review of Astronomy and Astrophysics, 1996 ▪ Abstract The cooling flows or winds from evolved stars are ideal for the formation of molecules and dust. The main location of molecular synthesis is the outer circumstellar envelope, where UV radiation from the interstellar medium penetrates the ...
A E Glassgold
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The origin of the high-velocity circumstellar gas around SN 1998S [PDF]
Monthly Notices of the Royal Astronomical Society, 2002 9 pages, 6 figures. MNRAS, accepted.
S I Blinnikov +2 more
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Limits on O VI Emission from the Shocked Circumstellar Gas of SN 1987A
, 2009 The Far Ultraviolet Spectroscopic Explorer (FUSE) was used to search for emission from the shock interaction of the ejecta of SN 1987A with its circumstellar material. FUSE observations of SN 1987A between 2000 and 2007 did not detect broad O VI emission.
George Sonneborn +2 more
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Gas phase atomic metals in the circumstellar envelope of IRC+10216
Astronomy and Astrophysics, 2010 We report the results of a search for gas phase atomic metals in the circumstellar envelope of the asymptotic giant branch carbon star IRC+10216. The search was made using high resolution (λ/Δ λ = 50 000) optical absorption spectroscopy of a background ...
N Mauron, P J Huggins
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On the Coupling of Grains to the Gas in Circumstellar Envelopes
Astrophysical Journal, 1972 exaly +2 more sources
Observation of Circumstellar Gas in the Neighborhood of RZ Psc
Astrophysics, 2013The first evidence is found of the existence of circumstellar gas in the nearest surroundings of the UX Ori star RZ Psc. Spectra obtained at the Terskol Observatory, Special Astrophysical Observatory (SAO), and the Nordic Optical Telescope (NOT) reveal a strong variability in the sodium doublet lines that is indicative of a sporadic outflow of matter ...
I S Potravnov, V P Grinin, Potravnov I S
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The chemical history of molecules in circumstellar disks [PDF]
Astronomy and Astrophysics, 2011 18 pages, 12 figures, accepted by A& ...
S D Doty, E F Van Dishoeck
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A PARAMETRIC MODELING APPROACH TO MEASURING THE GAS MASSES OF CIRCUMSTELLAR DISKS [PDF]
Astrophysical Journal, 2014 The disks that surround young stars are mostly composed of molecular gas, which is harder to detect and interpret than the accompanying dust. Disk mass measurements have therefore relied on large and uncertain extrapolations from the dust to the gas. We have developed a grid of models to study the dependencies of isotopologue CO line strengths on disk ...
Jonathan P Williams, William M J Best
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