Exozodiacal dust disks

Details Exozodiacal dust disks Exozodiacal dust disks

Nov 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009sf2a.conf..301a&link_type=abstract

SF2A-2009: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics, held 29 June - 4 July 2009 in

Astronomy and Astrophysics

Astrophysics

Scientific paper

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 using near-IR interferometry shows that exozodiacal disks are
by themself very interesting astrophysical objects. In these
proceedings, I review the current observations of exozodiacal dust
disks around nearby main sequence stars using near-infrared
interferometry, and show that, as a rule of thumb, the detected
exozodiacal dust disks differ from the zodiacal cloud. I then
consider possible dynamical scenarios that may give rise to an
abundant production of exozodiacal dust. I emphasize a promising
scenario involving the outward migration of a planet toward a
planetesimal belt similar to the Kuiper belt, and responsible for a
cometary bombardment.

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