1. Ge/Ay133 Can we study extrasolar Kuiper Belts?
b Pic, A5V star AU Mic, M1Ve star
Ge/Ay133

2. Impossible to see any exo-KBOs themselves, but…

5. How do we find debris disks?
Spitzer Data (FEPS team)
Model has 0.1 Mmoon of
30 mm size dust grains
in a disk from 30–60 AU
Bars are 3 s
Model based on disks
around A stars
Meyer et al., ApJS, 154, 422

6. What have far-IR SED surveys found?:
Overall decay consistent with erosional evolution, fluctuations
dominated by large collisions?
Rieke et al., ApJ, 620, 1010

16. Kalas, Graham, & Clampin – HST, Nature, June 2005
So, when rings are seen around >10 Myr old stars… the dust must be made in place.
CSO/HST have reached similar conclusions about structure of the disk around Fomalhaut and how it is generated. Is there a planet required to maintain it (Kalas et al. 2008)?
Kalas, Graham, & Clampin – HST, Nature, June 2005
Marsh et al. – ApJ, Feb. 2005

17. IRAM Plateau de Bure 1.3 mm
Vega
arcsec
Wilner et al. 2002
arcsec

18. Vega simulation – Marc Kuchner (GSFC)

19. What about “exo-zodii’s? That is, dust in ~1 AU range?
Rare!
Only one
convincing
case so far,
in large
aperture
searches.
Need to get
closer to the
star….
Beichman et al., ApJ, 626, 1061

22. Keck
Interferometer

23. What about gas?
Most searches negative, but “right” tracers (H2, C II) difficult to observe
Sharp rings suggestive of small amount of gas
Falling evaporative bodies? (next page)

24. FEBs = Falling Evaporative Bodies
See transient redshited absoprtion against
stellar continuum. Evaporating comets?
For the brightest sources (e.g. b Pic), you
can actually image things like Na I line
emission and map the disk.

25. Next time: What can comets tell us about the early S.S.?
Kuiper plot
Deep Impact
(Comet Tempel 1)
Comet Hale-Bopp