Dust in Supernovae Shells: Evolution and Destiny

Details Dust in Supernovae Shells: Evolution and Destiny Dust in Supernovae Shells: Evolution and Destiny

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsh21b0110m&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #SH21B-0110

Astronomy and Astrophysics

Astrophysics

7500 Solar Physics, Astrophysics, And Astronomy

Scientific paper

It has been observed from visual and infrared spectra that fine dust particles could be condensed into the expanding shells of supernovae explosions. In that environment dust is charged by ion impact and injected in the interstellar medium (ISM) at high initial speeds. Traveling across the ISM, dust loses mass by sputtering and the magnitude of its charge, due to secondary electron emission, is modified continuously. We analyze the dynamical behavior of fine dust solving the charge, momentum and energy equations and taking into account high initial speeds as well as very small dust particles (micrometric size). From the results it is concluded that dust travels long distances and remains in the ISM for a long time. Probably its existence could be related to heavy ions formation.

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