Radial velocity activity

In this activity you will use data analysis to determine the period of an exoplanet discovered around a newly discovered star COY-L-11e.

The data was gathered using radial velocity method, based on data gathered examining the visible spectrum of sodium

Using the base spectrum illustrated you will determine the doppler shift in spectrum position then the speed for the set of dat provided

The two clear spectra lines measured in the lab are shown below..

a) Carefully estimate the wavelength for each peak to one decimal place and then determine the frequency for each. Show all working.

b) The pdf linked below gives spectral imaging for 9 days. Using the stronger (more intense line) create a table of values measuring the wavelength of each image, then find the velocity using the relationship below as described in the text. (hint don't forget to change units from nano meters). Work as a team but show working for each calculation

c). Plot your graph as days (IV) vs velocity (DV)

d) Compare the graph to fig. 13.14 from text. Can you draw a smooth curve from the points?

e) What is the period? What does this mean about the exoplanet?

f) Can you determine if this star is moving toward or away from the Earth? Can you determine the speed?