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Exoplanet Science

Exoplanet Science. Don Pollacco QUB. Overview. PLATO’s objectives and space Work packages in the definition phase Timescales and aims of the definition phase. PLATO Space. Exoplanet Objectives. Detection and Characterisation of Earth Analog systems

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Exoplanet Science

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  1. Exoplanet Science Don Pollacco QUB

  2. Overview • PLATO’s objectives and space • Work packages in the definition phase • Timescales and aims of the definition phase

  3. PLATO Space

  4. Exoplanet Objectives • Detection and Characterisation of Earth Analog systems • Search for exoplanets around the brightest stars of solar type at all orbital periods and with all physical sizes • Search for exoplanets around nearby M-type dwarfs with all physical sizes and at all orbital periods, including at orbital distances such that these planets fall within the habitable zones of these very cool stars • Search for and characterization of exoplanets with a wide variety of sizes, masses and orbits around bright stars • Full characterization of very bright stars, of all masses and ages, using seismic analysis

  5. Reminder: Planet diversity CoRoT, M-Dwarf surveys Transiting planets • Transit  fractional radius (relative to host star)  inclination. • RV  planetary mass • 2 solid planets: - CoRoT-7b : Period ~ 0.85 d - MEarth-1b: Period ~ 1.50 d => Diversity Radius (Earth Units) ESA Cosmic Vision Dec 1 2009 PLATO: PLAnetary Transits and Oscillations of stars

  6. PLATO Planets • Bright hosts => can be used for many types of follow-up eg atmospheric analysis • Planets around the nearest hosts (eg 5th Mag G stars, M dwarfs etc) will be prized targets – maybe even direct imaging/spectroscopy • Bulk composition and diversity

  7. Definition Work Structure • Structure based on CoRoT, Kepler and ground based experiences/discussions • Work Packages are mix of mission (eg algorithm development/specification) and “pure” science • In general recognized experts involved

  8. 110 000 Exoplanet Science D.Pollacco 111 000 112 000 113 000 114 000 116 000 117 000 115 000 Light Curve Filtering A.Lanza Planet Detection Methods J.Cabrera Planet Candidate Ranking M.Deleuil Transit Fitting Tools M.Gillon PLATO Interpretation Specific Science H.Rauer Interface to Other WP and PDC N.Santos PLATA Data Specific Science D.Pollacco 115 100 111 100 112 100 114 100 116 100 113 100 Astrophysical Noise S.Aigrain General Planet detection Tools J.Cabrera Transit modeling S.Csizmadia Spectroscopic Noise sources C.Watson Mass-Radius Gas Giants T.Guillot Ranking Procedures A.Cameron 111 200 112 200 114 200 116 200 115 200 113 200 Residual Instrumental Noise F.Faedi Orbital parameters M.Deleuil Planetary System Characterisation A.Sozzetti Mass-Radius Terrestrial planets F.Soht Single Transit detection D.Pollacco False Positive identification M.Deleuil 112 300 116 300 113 300 115 300 Planet formation and orbital evolution R.Nelson Reflected Light detection I.Snellen Planet-Star interaction S.Mathis Astrophysical mimics A.Cameron 116 400 112 400 115 400 Other detection methods R.Silvotti Environments of HZ planets H.Lammer M-dwarfs as planet hosts P.Wheatley 116 500 112 500 Multi-body Systems S.Desidera Atmospheres of planets F.Selsis

  9. Light Curve filtering Concerned with identification and filtering of astrophysical noise (spots etc) and any residual instrumental noise

  10. Transit Detection Much work already done Need to optimize and apply to more unusual situations (multi-body systems) Examine timing capabilities and parameter space

  11. Candidate Ranking Given the pressure there will be on follow-up observations and in particular the RV facilities, then this is important. Need to develop efficient ranking procedures

  12. Transiting modelling Extensive work already in the literature But need to examine the validity of various techniques (eg small planet approximation) in the PLATO domain

  13. “Near-data” sciencedevelopment Science areas that will help either in modelling of PLATO related data (eg astrophysical noise effecting RV determination)

  14. Science Interpretation Areas of “pure” science that PLATO will impact on greatly. There are (many) others….

  15. Interface specifications An extremely important work package This specifies the requirements from other (non esp) areas needed to deliver the exoplanet parameters to the required level of accuracy

  16. Definition Phase Aims • Very preliminary report to ESP PDC (for scaling purposes) - asap • Full (literature) review - April 2011. This is to update/inform documentation for implementation phase. • Recommendations for improvements, developments and optimizations - December 2011

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