|COOKIES: By using this website you agree that we can place Google Analytics Cookies on your device for performance monitoring.|
Observations of exozodiacal disks
If you have a question about this talk, please contact Mustapha Amrani.
Dynamics of Discs and Planets
The zodiacal cloud has long been suspected to have extrasolar analogs, exozodiacal, debris clouds that remained elusive until very recently. Over the last decade, the presence of exozodiacal dust in the habitable zone around nearby stars, has essentially been discussed as a potential noise source that may compromise the ability of future exo-Earth finding missions to reach their goals. Our pioneering detection of exozodiacal dust around Vega in 2006 by near-IR interferometry shows that exozodis are by themself very interesting astrophysical objects. During this talk, I will review the current observations of exozodiacal dust disks around nearby main sequence stars, and show that, as a rule of thumb, the detected exozodiacal dust disks differ from the zodiacal cloud. I will then discuss possible dynamical scenarios that may give rise to an abundant production of exozodiacal dust. I will show that a promising scenario involves the outward migration of a planet destabilizing a planetesimal belt similar to the Kuiper belt, and responsible for a cometary bombardment.
This talk is part of the Isaac Newton Institute Seminar Series series.
This talk is included in these lists:
Note that ex-directory lists are not shown.
Other listsCambridge Bibliographical Society talks metabolism Denise Schofield
Other talksMoving to low carbon energy provision – do we have a choice? Continuum Models of Active Nematics Hybrid Nanomaterial Platforms For Improved Performance In Sensing And Solar Harnessing Hair braiding demos Mermaids, Cables and the Deep Sea: the telegraphic imagery in the 19th century Object handling session