The 2200 Å extinction hump and porous graphite grains
| ISSN: |
1572-946X
|
|---|---|
| Source: |
Springer Online Journal Archives 1860-2000
|
| Topics: |
Physics
|
| Notes: |
Abstract We discuss in this paper the possibility of interpreting the 2200 Å band occurring in the interstellar extinction curves as being attributed to porous graphite. The results show that grains with radii smaller than 0.015 μm and a porosity degree within the values 0.02≤f≤0.25 are able to fit satisfactorily the peak at 4.6 μm−1 and the band shape between 4 and 5.2 μm−1. Consideration of the expected density for such particles seems to confirm that interstellar grains may be porous but, at the same time, suggests that care must be taken when data concerning dust in the solar system are extrapolated to the interstellar space.
|
| Type of Medium: |
Electronic Resource
|
| URL: |