Item 1 For the stars listed below mV is the apparent visual (yellow) magnitude,

Question

Item 1

For the stars listed below mV is the apparent visual (yellow) magnitude, mB is the apparent blue magnitude, and MV is the absolute visual (yellow) magnitude.

Part A - magnitude matching - Essay 2

For the stars listed below mV is the apparent visual (yellow) magnitude, mB is the apparent blue magnitude, and MV is the absolute visual (yellow) magnitude.

Which star will live the longest?

Which star is the hottest?

Which star is a red giant?

For all three questions, justify your answer with an explanation of why you chose the star you chose. Be sure to detail what the magnitudes are telling you? How is one number different than another and why did that influence your choices? For example, how is a 6 different than a 10 for mV, or why is a 6 for mV different than a six for mB.

Star mV mB MV A 13 18 10 B 6 10 -2 C 5 7 3 D 7 8 7 E 15 18 5 F 2 -2 -3 G 14 13 12 H 6 6 7

Explanation / Answer

1) the G star will begoing to live longer, the life of a star is completely depend upon the absolute magnitude. higher absolute magnitude longer the life of the star, here the G star has the maximum absolute magnitude which is12 so it will live the longest.

2) Stars that are hotter and more luminous than the Sun live for shorter times, while stars that are cooler and less luminous live for longer times. This seems reasonable, since more luminous stars must be putting out energy at a higher rate, so they use up their hydrogen "fuel" faster. The hottest stars, live only for 10 million years or less so here F star has the matching values of the maximum absolute magnitude with this so it will be the hottest

3) maximum absolute magnitude nearer to 5 will be come under red giant category so here the E star is a red giant star.  

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