Planet Detection; Eclipse Timing Variation
Planet detection from eclipse timing variations is a method for determining the existence and properties of a planet in an eclipsing binary star system from the gravitational perturbations the planet induces in the orbit of the binary.
The mutual orbit of an isolated, unperturbed binary star system is purely Keplerian. That is, the two stars of the binary revolve around their center of mass in Keplerian orbits. In such systems, the orbital evolution of the system can be predicted precisely. If the two stars eclipse each other (in which case the system is known as an eclipsing binary), the eclipses will happen at the same time and will have the same durations. However, if the orbit of the binary is perturbed, changes will appear in the period of the binary eclipses. This is known as Eclipse Timing Variation or ETV.
Light travel time effect (LITE): a third body perturbing the center...
KeywordsOrbital Evolution Keplerian Orbit Extrasolar Planet Orbit Transfer Apsidal Motion
References and Further Reading
- Doyle LR, Deeg H-J (2004) Timing detection of eclipsing binary planets and transiting extrasolar moons. In: Norris R, Stootman F (eds) Bioastronomy 2002: life among the stars. Proceedings of IAU symposium, vol 213. Astronomical Society of the Pacific, San Francisco, p 80Google Scholar
- Doyle LR et al (1998) Detectability of Jupiter-to-Brown-Dwarf-Mass companions around small eclipsing binary systems. In: Rebolo R, Martin EL, Zapatero-Osorio MR (eds) Detectability of Jupiter-to-brown-dwarf-mass companions around small eclipsing binary system, brown dwarfs & extrasolar planets. ASP conference series vol 134. Astronomical Society of the Pacific, San Francisco, p 224Google Scholar
- Muterspaugh MW, Konacki M, Lane BF, Pfahl E (2010) Observational techniques for detecting planets in binary systems. In: Haghighipour N (ed) Planets in binary star systems. Astrophysics and space science library, vol 366. Springer, Berlin, p 77Google Scholar