SOME THEORETICAL CONSIDERATIONS ABOUT THE ORIGIN OF THE 220 NM INTERSTELLAR HUMP

Authors
PASCOLI G LECLERCQ J
Citation
G. Pascoli et J. Leclercq, SOME THEORETICAL CONSIDERATIONS ABOUT THE ORIGIN OF THE 220 NM INTERSTELLAR HUMP, Astrophysics and space science, 235(2), 1996, pp. 233-243
Citations number
19
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Astrophysics and space science → ACNP
ISSN journal
0004640X
Volume
235
Issue
2
Year of publication
1996
Pages
233 - 243
Database
ISI
SICI code
0004-640X(1996)235:2<233:STCATO>2.0.ZU;2-I
Abstract
The density of state (sigma and pi) of a small graphite-like planar cl uster is computed using a tight binding approach. We point out a possi ble correlation between the presence of surface levels, dependent on t he cluster size and localized near the middle of the sigma band gap, a nd the origin of the 220 nm interstellar hump. The influence of sp(3) sites - or impurities - randomly distributed throughout the cluster, i s also discussed.