Results 171 to 180 of about 55,649 (206)

Ab-initio dynamic study of mechanisms for dust-mediated molecular hydrogen formation in space. [PDF]

Commun Chem
Guo Y, McKenzie DR.
europepmc   +1 more source

Directed Gas-Phase Formation of Azulene (C₁₀H₈): Unraveling the Bottom-Up Chemistry of Saddle-Shaped Aromatics. [PDF]

ACS Cent Sci
Yang Z, Fujioka K, Galimova GR, Medvedkov IA, Goettl SJ, Sun R, Mebel AM, Kaiser RI.   +7 more
europepmc   +1 more source

Discovery of the Seven-ring Polycyclic Aromatic Hydrocarbon Cyanocoronene (C₂₄H₁₁CN) in GOTHAM Observations of TMC-1. [PDF]

Astrophys J Lett
Wenzel G, Gong S, Xue C, Changala PB, Holdren MS, Speak TH, Stewart DA, Fried ZTP, Willis RHJ, Bergin EA, Burkhardt AM, Byrne AN, Charnley SB, Lipnicky A, Loomis RA, Shingledecker CN, Cooke IR, McCarthy MC, Remijan AJ, Wendlandt AE, McGuire BA.   +20 more
europepmc   +1 more source

Imaging the circumstellar envelopes of AGB stars

Astronomy and Astrophysics, 2006
International audienceAims.We report the results of an exploratory program to image the extended circumstellar envelopes of asymptotic giant branch (AGB) stars in dust-scattered galactic light.
N Mauron, P J Huggins
exaly   +2 more sources

Molecular abundances in carbon-rich circumstellar envelopes [PDF]

Astronomy and Astrophysics, 2003
A millimetre molecular line survey of seven high mass-loss rate carbon stars in both the northern and southern skies is presented. A total of 196 emission lines (47 transitions) from 24 molecular species were detected.
Paul Woods, H Olofsson, F L Schoier
exaly   +2 more sources

Interferometric view of the circumstellar envelopes of northern FU Orionis-type stars [PDF]

Astronomy and Astrophysics, 2017
Context. FU Orionis-type objects are pre-main sequence, low-mass stars with large outbursts in visible light that last for several years or decades. They are thought to represent an evolutionary phase during the life of every young star when accretion ...
Peter Abraham, Agnes Kóspál, Christian Brinch   +2 more
exaly   +2 more sources

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The Circumstellar Envelope of S Persei

Astrophysics and Space Science, 1995
We present MERLIN observations of OH and H2O masers in the circumstellar envelope of S Per. The results are consistent with a model of a thick shell of H2O masers in a region which is still accelerating.
Richards, A M S, Cohen, R J, Yates, J A
openaire   +2 more sources

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

The structure of circumstellar envelopes

Astrophysics and Space Science, 1995
Copious mass loss on the Asymptotic Giant Branch dominates the late stages of stellar evolution. Maps of extended circumstellar envelopes provide a history of mass loss and trace out anisotropic mass loss. This review concentrates on observations of millimeter wavelength molecular line emission, on high resolution maps of maser emission and on ...
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Observations in circumstellar envelopes

Journal of Physics G: Nuclear and Particle Physics, 1993
During the very late stages of the red giant phase (late 'asymptotic giant branch' or AGB), the mass-loss rate considerably increases and generates massive and thick circumstellar envelopes. AGB circumstellar envelopes are very luminous infrared sources and emit many millimeter molecular lines.
openaire   +1 more source