Presentation UE6
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Transcript Presentation UE6
Diego Pozo Morillas
Gonzalo Campos Garrido
Ricardo Moreno Ruano
Introduction
Methods for discovery and obtained results
Instruments and missions
Conclusions
Measures change of brightness of a star due to planet
transit.
If the change is periodical it can be assumed is due to an
orbiting planet
Earth-like planets change brightness only in 84 ppm.
Discovers mostly big planets with short periods.
Motivation: Finding Earth-like Planets in the
Habitable Zone
Controls 100.000 stars using Transits method
3,5 years + 2,5 years possible extension
Credits: GFDL
Focus on the Cygnus-Lyra region of the Milky Way
High density of stars as stable as the Sun
Over the ecliptic plane to protect from Earth-SunMoon interactions
Credits: NASA
Schmidt Telescope Photometer
CCD 95Mpixels camera
Images every 6 seconds, integrated every 30
4 sigma statistical selection
So far it has detected 15 planets
First 5 in the habitable zone last 1/2/11
1200+ candidates
Majority of the discoveries so far
Based on systems of mirrors
Capable of direct imaging, radial velocity and
transit methods
Infrared spectrometry widely used
High Accuracy Radial Velocity Planet Searcher
(HARPS)
European Extremely Large Telescope (E-ELT)
Most sofisticated optical system in the world:
Very Large Telescope Interferometer (VLTI)
4 fixed telescopes (8,2m) and 4 movable
auxiliary ones (1,8m)
Resolution several times better than Hubble’s
Several different validated methods
Several on-Earth and flying missions
500+ planets discovered so far
Earth-like planets on target