Nanodiamond dust and the energy distribution of quasars
Research output: Contribution to journal › Journal article › peer-review
The spectral energy distribution of quasars shows a sharp steepening of the continuum shortward of ≃ 1100 Å. The steepening could be a result of dust absorption. We present a dust extinction model which considers crystalline carbon grains and compare it with SMC-like dust extinction consisting of a mixture of silicate grains with graphite or amorphous carbon grains. We show that the sharp break seen in individual quasar spectra of intermediate redshift ∼1-2 can be reproduced by dust absorption provided the extinction curve consists of nanodiamonds, composed of terrestial cubic diamonds or of diamonds similar to the presolar nanodiamonds found in primitive meteorites.
|Number of pages||4|
|Publication status||Published - 3 Apr 2006|
- Galaxies: active, ISM: dust, Ultraviolet emission