The Origin of Gaps and Holes in Transition Disks Uma Gorti (SETI Institute)
Disks - Variability, Gaps & Protoplanets A Practical Guide.
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Transcript of Disks - Variability, Gaps & Protoplanets A Practical Guide.
Disks - Variability, Gaps &
ProtoplanetsA Practical Guide
Young Pre-Main Sequence Disks
Regenerated “Debris Disks” - replenished by collisions
“Older” PMS Disks - grain growth & settling
Zodiacal Light - Our Solar System Today
How do planetary
systems form & evolve?
Need to study the disk
structures as a function of
“age”.
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Stars in the “planet-formation” phase? 2-20 Myr old
Idealized Disksvisible infrared
high T
low TWien’s Law!
TW Hya - Calvet et al. 2002, ApJ, 568, 1008
outer diskwallinner disk
BASS!
“Puffed-Up Inner Disks”
Meeus Groups I and II(Meeus et al. 2001, A&A, 365, 476
Dullemond, Dominik, & Natta 2001, ApJ, 560, 957
Dullemond 2002, A&A, 395, 853
Meeus Group I
Meeus Group
II Looks good, but wait just a minute.... Let’s look at some Meeus
Group I objects more
closely......
“Identifying gaps in flaring Herbig Ae/Be disks using spatially resolved mid-infrared imagingAre all group I disks transitional?”
Maaskant et al. 2013 - arXiv 1305.3183v1
evolutionary scenario?
“Transitional Disks”
Cleared Disks & Puffy Rims
COC March 19, 2008
Hughes et al. 2007, ApJ, 664, 536
Observations
“Hole” ModelNo “Hole” Model
TW Hya
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LkCa 15H-band coronagraphic AO image
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“Debris Disks”
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Regenerated Debris Disks
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There IS NO “The Model”Inner Disk Variability
InterferometryIsella et al. 2006, A&A, 451, 951Monnier et al. 2006, ApJ, 647, 444
http://www.mpifr-bonn.mpg.de/div/ir-interferometry/
Fringes in the JHK bandsQuickTime™ and aGIF decompressorare needed to see this picture.
DG Tau - Spitzer IRS (courtesy of Jeff Bary)
rightafteroutburst
HD 163296 = MWC 275
Exoplanets
“Hot Jupiters”? Who ordered
those?!
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Okay, where did all the “Hot Jupiters” come from?
Cannot form inside the snow/frost line
Formed further out & migrated
A nice “little” (8 MB) of one example, by Phil Armitage, U Colorado
Also, planetary scattering (Nice model...)
Bottom line: current locations
of exoplanets may have little
to do with where they formed.
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Late Heavy Bombardment
but LHB disputed...
Inside the “gap” of SAO 206462
Spiral arm modeling - probably 2 planets
NASA Press releaseUC student on the paper: Chelsea
Werren
Sparse Aperture Mask (SAM) InterferometryKeck II - NIRC2 Camera, January 2012
V1247 Ori - Kraus et al. 2013
PlanetQuest blurb
Sky & Telescope blog
UC students on the paper: Jeremy Swearingen, Chelsea
Werren
HD 142527 - Casassus et al. 2013
observation model artwork
Summary
•Sublimation of dust (planet-forming material)
•gravitational sweeping of formed planets
•protoplanet candidates possibly detected
Study of Inner Disk Variability:•understand the physics of planet-forming disks
•understand the distribution of processed material in the disks
•some variability may be planet-generated
Disks Clear Due To:
Fin
