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[Fizinfo] Szemináriumi meghívó / Invitation to a seminar

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  • From: vidakris AT
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  • Subject: [Fizinfo] Szemináriumi meghívó / Invitation to a seminar
  • Date: Fri, 25 Nov 2022 10:39:14 +0100
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Szemináriumi meghívó / Invitation to a seminar


Date: Dec 01, 2022 (Thursday) 14:00

Attila Moór (Konkoly Observatory, CSFK, Hungary):
New hypotheses for the origin of extreme debris disks

Extreme debris disks (EDDs) are rare systems with unusually large amounts of
warm dust that are thought to stem from recent giant collisions between
planetary embryos during the final phases of terrestrial planet growth. In my
talk I will report on identification and characterization of a new sample of
EDDs - all hosted by Sun-like stars - that triples the number of known
objects of this type. While rocky planet formation models predict that the
majority of giant collisions occur in the first 100 Myr, we found that the
sample of EDDs is dominated by systems older than this age. This may indicate
either that the era of giant impacts is longer than we think, or that some
other mechanism(s) can also produce EDDs. Regarding this last point, I will
outline some alternative models.

The seminar will be held live in the Detre hall with audience, but also
streamed online via Zoom. If you are unable to attend the presentation in
person, you can join us via this link:
or the meeting ID: 828 0691 1982 and passcode: 206265

Everyone is welcome!

Krisztián Vida, Ramon Brasser

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