Stratified dust grains in the interstellar medium - II. Time-dependent interstellar extinction (Articolo in rivista)

Type
Label
  • Stratified dust grains in the interstellar medium - II. Time-dependent interstellar extinction (Articolo in rivista) (literal)
Anno
  • 2010-01-01T00:00:00+01:00 (literal)
Alternative label
  • Cecchi-Pestellini C.; Cacciola A.; Iatì M.A.; Saija R.; Borghese F.; Denti P.; Giusto A.; Williams D.A. (2010)
    Stratified dust grains in the interstellar medium - II. Time-dependent interstellar extinction
    in Monthly notices of the Royal Astronomical Society (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Cecchi-Pestellini C.; Cacciola A.; Iatì M.A.; Saija R.; Borghese F.; Denti P.; Giusto A.; Williams D.A. (literal)
Pagina inizio
  • 535 (literal)
Pagina fine
  • 541 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 408 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1) INAF - Osservatorio Astronomico di Cagliari, Strada n. 54, Loc. Poggio dei Pini, 09012 Capoterra (CA), Italy 2) Dipartimento di Fisica della Materia e Ingegneria Elettronica, Università di Messina, Viale F. Stagno d'Alcontres 31, 98166 Messina, Italy 3) Istituto per i Processi Chimico-Fisici del CNR, Viale F. Stagno d'Alcontres 37, 98158 Messina, Italy 4) Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT (literal)
Titolo
  • Stratified dust grains in the interstellar medium - II. Time-dependent interstellar extinction (literal)
Abstract
  • We consider a model of diffuse cloud dust in which carbon is deposited slowly on the surfaces of silicate cores. The solid carbon is also processed by the interstellar radiation so that its optical properties change with time. The computed interstellar extinction curves (ISECs) for this model evolve in time, lie close to the observed mean ISEC for substantial periods but generate at later times significant dispersions in the far-ultraviolet (for ISECs normalized in the visual). The requirement on the carbon budget is well within that available, while essentially all the available silicon must be in the silicate cores. The variety of observed ISECs may therefore be interpreted (at least, in part) as due to evolutionary changes in a time-dependent model of interstellar dust. (literal)
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