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Overlap of Direct Imaging and Radial Velocity Searches

Explore the advantages and potential drawbacks of combining direct imaging and radial velocity searches for planet detection. Learn how overlapping these methods can improve efficiency in identifying planetary systems. Consider the implications on observing protocols and understanding stellar characteristics.

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Overlap of Direct Imaging and Radial Velocity Searches

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  1. Overlap of Direct Imaging and Radial Velocity Searches Nick Cowan, SAG 9 (Northwestern University)

  2. IWA = 100 mas known planets RV = 1 m/s Contrast = 10-9 T = 140 K T = 1000 K T = 255 K

  3. Virgin Territory

  4. Is Overlap a GOOD THING? Pros: • Know which stars to observe • Know where and when to observe given stars • Know planetary mass Cons: • Not probing new parameter space

  5. 20% of FGK Stars Have Gas Giant within 20 AU(better odds for smaller planets) Cumming+(2008)

  6. Knowing When/Where to Look

  7. Knowing When/Where to Look

  8. Knowing When/Where to Look Non-Zero Eccentricity Unkown Inclination

  9. Good News: we know e and ω Blind Search |esin(ω)| No Problem Only One Max-Elong |ecos(ω)|

  10. Demory & Seager (2011)

  11. Overlap is a GOOD THING Pros: • Know which stars to observe (5x improvement) • Know where and when to observe stars (roughly 2x improvement) • Know planetary mass (convert brightness to albedo) 10x improvement in efficiency of finding planets

  12. Which Known RV Planets could a Notional DI Mission Detect? R. Brown (pers. com.)

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