13. Exoplanets 2

Question 1

How do we do direct imaging

Answer 1

Ground based telescopes

Question 2

How do we do transit spectroscopy

Answer 2

Primary eclipse: a transmission spectrum when the pleut transits in front of host star (abdorbsion)
Secondary eclipse :a emission spectrum as planet passes behind host star

Question 3

What spectra comes from the primary eclipse?

Answer 3

Transmission spectra(absorption’
Absorptions from molecules like h20,co etc in wavelengths

Question 4

What spectra comes from secondary eclipse?

Answer 4

Emmisoon spectrum (when planet is behind host star?
Has both reflection of starlight and emission from planets

Question 5

What are hot jupiters?

Answer 5

Exoplanets w masses and radii similar to Jupiter but periods of only 4 days

Question 6

Why do exoplanets have large range of excentricité?

Answer 6

Probably due to dynamical interactions in multiple planetary systems?