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A Sub-mm View of Debris Disks: The case for CCAT exploration

A Sub-mm View of Debris Disks: The case for CCAT exploration. η Corvi Wyatt et al. (2005). 450 μm. 850 μm. Sally Dodson-Robinson University of Texas. Spitzer 160 μm. HD 207129: 16 pc 152-158 mJy HD 10647: 17 pc 451-462 mJy HD 115617 (not shown): 8.5 pc 89-141 mJy

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A Sub-mm View of Debris Disks: The case for CCAT exploration

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  1. A Sub-mm View of Debris Disks:The case for CCAT exploration η Corvi Wyatt et al. (2005) 450 μm 850 μm Sally Dodson-Robinson University of Texas

  2. Spitzer 160 μm HD 207129: 16 pc 152-158 mJy HD 10647: 17 pc 451-462 mJy HD 115617 (not shown): 8.5 pc 89-141 mJy All disks marginally resolved at 70, 160 μm Tanner et al. (2009)

  3. Herschel: HD 207129 (16 pc) Flux densities PACS: 70 μm 284 mJy 100 μm 311 mJy 160 μm 211 mJy SPIRE: 250 μm 113 mJy 350 μm 44.3 mJy 500 μm 25.9 mJy APEX: 870 μm 5 mJy Color scale: mJy/arcsec2 Spatial scale: 10” = 160 AU DUNES key project, Marshall et al. (2011)

  4. New Discovery: ζ2 Ret (12 pc) Flux densities: 70 μm 8.9 mJy 100 μm 13.5 mJy Resolved at both wavelengths DUNES; Eiroa et al. (2010)

  5. More Distant Systems HD 33636 29 pc HD 50554 31 pc HD 52265 28 pc HD 105211 20 pc Detections: Spitzer 32, 70 μm Predictions: PACS 70, 100, 160 μm SPIRE 250, 350, 500 μm *Based on Spitzer fluxes, all should be 5σ detectable at CCAT 350 μm Dodson-Robinson, in preparation (OT1_sdodsonr_1)

  6. HD 202206: “Extra Excess” Predicted flux densities (single temperature model): 100 μm 29.6 mJy 160 μm 21.6 mJy 350 μm 7.5 mJy Observed flux densities (work in progress): 100 μm 36 mJy 160 μm 30 mJy ~25-40% “extra excess” *Means there is extra cold dust not seen by Spitzer

  7. HD 202206: Resolved? |---------| 1000 AU Distance: 46.3 pc

  8. CCAT Discovery Potential Hypothetical star: G5V spectral type Tdust = 51 K Ldust/L* = 3 x 10-5 d = 50 pc Flux densities at CCAT wavelengths: 350 μm 2.3 mJy 500 μm 1.3 mJy *5σ detectable in both bands 4% of FGK stars have debris this luminous Targets with dec -60 to 0: 10915 Expected detections: >400

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