Question 3 This question is about stellar classification. Table 1 lists some properties of seven stars, labelled a-g. Table 1 Star Spectrum B-V Mass / Mo Luminosity class V a 0.1 b 3 Strong broad hydrogen lines Spectral class K Strong lines of titanium oxide Strong narrow hydrogen lines Spectral type G2 d > - > e 0.5 f 0.0 0.5 g Strong ionized helium lines (a) (i) List the stars in order of temperature (highest first). (ii) Explain how you obtained this order. (6 marks) (b) (i) Sketch a Hertzsprung-Russell diagram and label the axes with temperature and luminosity. (ii) Sketch, on the Hertzsprung-Russell diagram, the locations of the main sequence, red giants, supergiants and white dwarfs. (iii) On your diagram indicate the approximate locations of each of the stars in the table above. (iv) Give the reasons for your placement of star 'b'. (9 marks) Question 3 This question is about stellar classification. Table 1 lists some properties of seven stars, labelled a-g. Table 1 Star Spectrum B-V Mass / Mo Luminosity class V a 0.1 b 3 Strong broad hydrogen lines Spectral class K Strong lines of titanium oxide Strong narrow hydrogen lines Spectral type G2 d > - > e 0.5 f 0.0 0.5 g Strong ionized helium lines (a) (i) List the stars in order of temperature (highest first). (ii) Explain how you obtained this order. (6 marks) (b) (i) Sketch a Hertzsprung-Russell diagram and label the axes with temperature and luminosity. (ii) Sketch, on the Hertzsprung-Russell diagram, the locations of the main sequence, red giants, supergiants and white dwarfs. (iii) On your diagram indicate the approximate locations of each of the stars in the table above. (iv) Give the reasons for your placement of star 'b'. (9 marks)