Phd talk.mini
- 1. PHD Project Work – E. FarrellPHD Project Work – E. Farrell Eclipsing Binary Statistics … in the PLATO 2.0 Field
- 2. PLATO 2.0 MissionPLATO 2.0 Mission PLAnetary Transits & Oscillations of stars
- 3. PLATO 2.0 MissionPLATO 2.0 Mission Long-duration Observatio: continuous observations for two sky pointings, lasting a minimum of 2 years Step-and-Stare Phases: consisting of shorter-period observations of several sky fields, each for a min. 2 months Ensemble of 32 cameras bandpass 500 – 1050 nm monitoring for bright stars m > 8 mag. Field of View 1100 deg^2
- 4. PLATO 2.0 MissionPLATO 2.0 Mission PLAnetary Transits & Oscillations of stars Plato ESA presentation 2014 Will provide data on Exoplanets: •mean density composition (rocky, mini-gas) constrain atmosphere scale heights •albedo and its diversity indicative for clouds, hazes •accurate ages evolutionary pathways •characterized host stars incident flux, stellar activity
- 6. ProblemProblem: Exoplanet False Positives: Exoplanet False Positives
- 7. Solution: Estimate False Positives 1. Population Synthesis: Generate synthetic binaries 2. Apply to PLATO fields 3. Output number of Eclipsing Binaries at certain transit depths
- 8. Why estimate False Positives? Generate statistics on field contamination from Eclipsing Binaries provide input on field placement for PLATO.
- 9. Population SynthesisPopulation Synthesis 'BiSEPS''BiSEPS' Binary & Stellar Evolution Population Synthesis Willems & Kolb (2002, 2004) Single and Binary system evolutionary tracks - ZAMS up to 13 Gyrs Evolve millions of systems - analytical stellar evolution functions Hurley, Pols & Tout (2000)
- 10. Population SynthesisPopulation Synthesis 'BiSEPS''BiSEPS' Calculates Mass Loss, Roche lobe overflow, angular momentum losses & magnetic braking Galatic Disk modeled as thin and thick disk with solar and sub-solar metallicities
- 11. Eclipsing BinariesEclipsing Binaries Specialised Software - “JKTEBOP” analyses light curves of detached eclipsing binaries (John Southward – Keele University) Sophisticated – calculates times of minimum light, spectroscopic light ratios, third light values, orbital eccentricities Adapted by Rob Farmer, Open University to output transit depths
- 12. ResultsResults Start with PLATO Northern 'Long Stare' field Focus on 5 x 5 degree patch
- 13. ResultsResults
- 14. Random inclination – 5 simulationsRandom inclination – 5 simulations
- 15. Random inclination – 100 simulationsRandom inclination – 100 simulations
- 16. Future WorkFuture Work Blend probabilities: Scan field for binaries & single stars within 1 pixel
- 17. Future WorkFuture Work Apply to other surveys
- 18. Future WorkFuture Work Contribute to open-source community library