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Create a H-R Diagram (15 Pts) Objective: Use that Table of stars and plot them on the Empty H-R diagram based on Luminosity and Spectral Class. Use circles or shading to correctly label the Main Sequence, Giants, and Dwarfs. Then use your diagram to answer the questions. Stars: Star Name Stellar mass Spectral (Solar mass) Class The Sun 1 G2 Vega 2.1 A0 Rigel 17 B8 Cygni A 1.02 G8 Pollux 1.86 K0 Spica 11 O5 Sirius A 2 A2 Sirius B 0.9 B5 Proxima Centauri 0.123 M5 Alpha Centauri A 1.1 G2 Betelgeuse 14 M2 Arcturus 1.5 K1.5 Bernard’s Star 0.1 M2 Polaris 4.3 F7 Achenar 6 B3 Bellatrix 8 B0 Make sure to label each star with its name! H-R Rubric (15 Pts) Awesome Good Luminosity (Solar units) 1 37 66,000 .6 32 13,400 25.4 0.026 0.0017 1.5 63,000 210 0.02 2,100 3,311 4,500 Good Enough Apparent Magnitude -26.8 0 +0.18 +5.96 +1.15 +1.04 -1.47 +8.3 +11 -0.01 +.58 -0.04 +9.8 +1.97 +0.5 +1.64 Not Good Enough Really? No 5 4 3 2 1 Star Position All stars are in the correct position (to the mm) all stars are labeled All stars are plotted most are within a cm All stars are plotted Most stars are plotted Star Groupings All stars are in the correct position (to the cm) all stars are labeled All three groups are marked, Correctly included most stars, And labeled All three groups are Marked, Correctly included all stars, And Clearly labeled All Questions All Questions are answered are answered All are correct Most are correct All the groups are marked and include all of the stars There are stars not included in one of the groups There is a group missing: (Main sequence, Dwarf, and Giant) All Questions are answered Most questions are answered Less then half the questions are answered Questions Questions: 1. What color is the hottest? 2. What color is the coldest? 3. Which Star(s) are Main Sequence stars? 4. Which Star(s) are Giants? 5. Which Star(s) are Dwarfs? 6. Where are giants on the graph in terms of luminosity? Why do you think this might be? 7. Which star is most like the sun? 8. How does color effect luminosity? 9. What can you speculate about Dwarf stars based on the color and luminosity? 10. What happens to stars of similar mass, as their temperature gets cooler?