scholarly journals Silicate and ice emission bands in the ISO spectrum of the PAH-emitting carbon-rich planetary nebula CPD-56°8032

1999 ◽  
Vol 191 ◽  
pp. 291-296
Author(s):  
Martin Cohen ◽  
M. J. Barlow ◽  
R. J. Sylvester ◽  
X.-W. Liu ◽  
P. Cox ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Planetary Nebula ◽  
Kuiper Belt ◽  
Simultaneous Presence ◽  
Water Ice ◽  
Polycyclic Aromatic ◽  
Crystalline Water ◽  
History Of ◽  
Bright Emission

Combined ISO SWS and LWS spectroscopy is presented of the late WC-type planetary nebula nucleus CPD-56†8032 and its carbon-rich nebula. The extremely broad coverage (2.4–197 μm) enables us to recognize the clear and simultaneous presence of emission features from both oxygen- and carbon-rich circumstellar materials. Removing a smooth continuum highlights bright emission bands characteristic of polycyclic aromatic hydrocarbons (hereafter PAHs) in the 3–15 μm region, bands from crystalline silicates longwards of 18 μm, and the 43- and 62-μm bands of crystalline water ice. We discuss the probable evolutionary state and history of this unusual object in terms of (a) a recent transition from an O-rich to a C-rich outflow following a helium shell flash; or (b) a carbon-rich nebular outflow encountering an O-rich comet cloud orbiting in a Kuiper-belt-like distribution.

scholarly journals Biological risk and pollution history of polycyclic aromatic hydrocarbons (PAHs) in Nansha mangrove, South China

2014 ◽  
Vol 85 (1) ◽  
pp. 92-98 ◽  
Author(s):  
Qihang Wu ◽  
Jonathan Y.S. Leung ◽  
Nora F.Y. Tam ◽  
Shejun Chen ◽  
Bixian Mai ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
South China ◽  
Aromatic Hydrocarbons ◽  
Pollution History ◽  
Biological Risk ◽  
Polycyclic Aromatic ◽  
History Of

scholarly journals PHOTOCHEMISTRY OF POLYCYCLIC AROMATIC HYDROCARBONS IN COSMIC WATER ICE: THE ROLE OF PAH IONIZATION AND CONCENTRATION

2015 ◽  
Vol 799 (1) ◽  
pp. 14 ◽  
Author(s):  
Amanda M. Cook ◽  
Alessandra Ricca ◽  
Andrew L. Mattioda ◽  
Jordy Bouwman ◽  
Joseph Roser ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Water Ice ◽  
Polycyclic Aromatic

scholarly journals Water–Ice Analogues of Polycyclic Aromatic Hydrocarbons: Water Nanoclusters on Cu(111)

2017 ◽  
Vol 139 (18) ◽  
pp. 6403-6410 ◽  
Author(s):  
Melissa L. Liriano ◽  
Chiara Gattinoni ◽  
Emily A. Lewis ◽  
Colin J. Murphy ◽  
E. Charles H. Sykes ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Water Ice ◽  
Polycyclic Aromatic

Theoretical determination of adsorption and ionisation energies of polycyclic aromatic hydrocarbons on water ice

2018 ◽  
Vol 20 (17) ◽  
pp. 11941-11953 ◽  
Author(s):  
Eric Michoulier ◽  
Nadia Ben Amor ◽  
Mathias Rapacioli ◽  
Jennifer A. Noble ◽  
Joëlle Mascetti ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Local Structure ◽  
Theoretical Determination ◽  
P Adsorption ◽  
Water Ice ◽  
Polycyclic Aromatic

Adsorption of interstellar PAHs on various ice geometries at the DFTB level: correlation between ionisation potentials and local structure. Example of pyrene adsorbed on Ih ice.

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