Stars + planets 1: lightcurves across the HR diagram.
In this video Kassie and Nora discuss stars! Stars can be sorted according to their temperature (colour) and their brightness, giving us the HR diagram. The majority of stars can be found in a rough diagonal line across the HR diagram - this is called the main sequence. Stars spend the vast majority of their lives on this main sequence, where they generate energy by fusing hydrogen into helium. Once the stars have run out of hydrogen, they become brighter (as they get larger), and cooler, and therefore move towards the top right hand corner of the HR diagram. All stars move across the HR diagram throughout their lives - with their exact path depending on their initial mass. This means that we can use the HR dirgam to assess at what stage of its life a given star is.
Depending on where on the HR diagram a star lies can affect the lightcurve that we see. Watch this episode to find out more.
Click the logos below to open up the Colab notebook or to download the Jupyter notebook. These notebooks provide code to plot the HR diagram.