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Seminarios SEMINARIO DFI: The radio continuum emission mechanisms from interstellar molecular clouds
Seminarios SEMINARIO DFI: The radio continuum emission mechanisms from interstellar molecular clouds
| SEMINARIO DFI: The radio continuum emission mechanisms from interstellar molecular clouds |
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Expositor: Simón Casassus Departamento de Astronomía---FCFM Viernes 4 de Noviembre, 16:00 h Sala F12 Abstract: An `anomalous' radio continuum was found 10 years ago in the direction of molecular clouds. This emission is consistent with electric dipole radiation from polarized very small grains spinning at GHz frequencies, or `spinning dust'. I will summarise recent observations of this phenomenon, and investigate the nature of the grain spin-up mechanism. The data so far are consistent with spin-up from the recoil of H2 formation on grain surfaces, and are not consistent with radiative torques or collisions. |
