Results 151 to 160 of about 536 (176)

Infrared Cooling in an Anharmonic Cascade Framework: 2-Cyanoindene, the Smallest Cyano-PAH Identified in Taurus Molecular Cloud-1. [PDF]

ACS Earth Space Chem
Stockett MH, Esposito VJ, Ashworth EK, Jacovella U, Bull JN.   +4 more
europepmc   +1 more source

Battle of the CH motions: aliphatic versus aromatic contributions to astronomical PAH emission and exploration of the aliphatic, aromatic, and ethynyl CH stretches. [PDF]

Mon Not R Astron Soc
Esposito VJ, Bejaoui S, Billinghurst BE, Boersma C, Fortenberry RC, Salama F.   +5 more
europepmc   +1 more source

Constraining the history of water and climate on Mars through light element stable isotope analysis of volatiles in returned martian samples. [PDF]

Proc Natl Acad Sci U S A
Grady MM.
europepmc   +1 more source

Diversity of protonated mixed pyrene-water clusters investigated by collision induced dissociation.

Phys Chem Chem Phys
M Nair A, Leboucher H, Toucouere L, Zamith S, Joblin C, L'Hermite JM, Marciniak A, Simon A.   +7 more
europepmc   +1 more source

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The Onset of Axial Symmetry in Protoplanetary Nebulae

Astrophysics and Space Science, 1995
We have obtained resolved IR images, at wavelengths from 1.2μm to 12.5μm, of a small sample of protoplanetary nebulae. The results suggest that all PPNe are axially, not spherically, symmetric, that spherical symmetry ends at the tip of the AGB, and that AGB evolution terminates with a burst of remarkably rapid, equatorially concentrated mass-loss.
M. J. Barlow, John F. Arens, Kay Justtanont, C. J. Skinner, Margaret Meixner, J. G. Jernigan   +5 more
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The Dust Subdisk in the Protoplanetary Nebula

Icarus, 1995
Abstract We present a self-consistent computation of the structure of the dust subdisk in the protoplanetary nebula. The main physical processes governing the dynamics of the dust disk are reviewed. A (nonlinear) vertical diffusion equation for the transport of dust particles is derived.
Gregor E. Morfill, Michael Sterzik, Bérengère Dubrulle   +2 more
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Compact reflection nebulae associated with protoplanetary nebulae

Chinese Astronomy and Astrophysics, 1991
Abstract Optical identifications and slit spectra and CCD direct images show that, of the protoplanetary nebulae (PPN) selected from the IRAS Catalogue of Point Sources, three are associated with compact reflection nebulae. In this paper we use a spherically symmetric dust shell model to calculate the brightness and colour evolution of the central ...
Hu Jing-yao, Tang Qing-quan
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Formation of amorphous ice in the protoplanetary nebula

Planetary and Space Science, 1994
Abstract The criteria for formation of amorphous ice in different models of the protoplanetary nebula are developed. Assuming that comets are composed mostly of amorphous ice, it is shown that the inner boundary of formation of cometary nuclei is about 7 A.U.
Y. Mekler, Morris Podolak
openaire   +2 more sources