Introducing
Your new presentation assistant.
Refine, enhance, and tailor your content, source relevant images, and edit visuals quicker than ever before.
Trending searches
An exoplanet is a planet outside the Solar System.
As a planet orbits a star, both objects orbit around the center of mass. The movement of the star can be detected by looking at its spectral lines.
Result and Conclusion
Approximately 0.03nm
Real FWHM : 0.04nm -> 0.01nm is caused by rotation
-> rotation velocity of the star 5km/s
We can observe the dimming of light!!
In that case we can use the doppler effects!!
What about planets that don't transit the star??
Doppler Effect :
The Doppler effect is the change in frequency of a wave when the source and the receiver have relative movement between each other.
Kepler’s 3rd Law :
The square of the orbital period of a planet is directly proportional to the cube of the semi-major axis of its orbit.
Broadening
Target planet
Minimum Mass of the exoplanet
The Orbit of Exoplanet could be tilted from our point of view causing the decrease from the true velocity of star by cos i (angle of tilt)
Thermal doppler broadening Rotation
Zeeman effect
Stark effect
Too little mass -> insufficient wiggle to be measured -> Can't be used