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4. The HR diagram to the right shows a star cluster whose stars all formed at the same time. The x-axis is labeled in units of thousands (10³) of Kelvin, so "5" = "5,000 K a. Circle the Main Sequence. b. At what temperature does the Main Sequence stop and "turn off towards the right? Draw a vertical line. c. What spectral type does this temperature correspond to? d. The stars at this MS turn-off are the most massive stars still on the MS, as stars more massive than this point have died. How old (approximately) is this star cluster? 10% 10 10% 1 10 10¹ 10° 10¹ 10 10 10 10 9 8 7 6 5 Temperatur 10100 4

4. The HR diagram to the right shows a star cluster whose stars all formed at the same time. The x-axis is labeled in units of thousands (10³) of Kelvin, so "5" = "5,000 K a. Circle the Main Sequence. b. At what temperature does the Main Sequence stop and "turn off towards the right? Draw a vertical line. c. What spectral type does this temperature correspond to? d. The stars at this MS turn-off are the most massive stars still on the MS, as stars more massive than this point have died. How old (approximately) is this star cluster? 10% 10 10% 1 10 10¹ 10° 10¹ 10 10 10 10 9 8 7 6 5 Temperatur 10100 4

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
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4. The HR diagram to the right shows a star cluster whose stars all formed at the same time. The x-axis is labeled in units of thousands (10³) of Kelvin, so "5" = "5,000 K" a. Circle the Main Sequence. b. At what temperature does the Main Sequence stop and "turn off" towards the right? Draw a vertical line. c. What spectral type does this temperature correspond to? d. The stars at this MS turn-off are the most massive stars still on the MS, as stars more massive than this point have died. How old (approximately) is this star cluster? 10% 10 10¹ 110 10¹ 10° Luminosity (Lo)→ 10 102 10 10 a sic R www 10 9 8 7 6 5 4 -Temperaturex 10¹ (K)
Transcribed Image Text:4. The HR diagram to the right shows a star cluster whose stars all formed at the same time. The x-axis is labeled in units of thousands (10³) of Kelvin, so "5" = "5,000 K" a. Circle the Main Sequence. b. At what temperature does the Main Sequence stop and "turn off" towards the right? Draw a vertical line. c. What spectral type does this temperature correspond to? d. The stars at this MS turn-off are the most massive stars still on the MS, as stars more massive than this point have died. How old (approximately) is this star cluster? 10% 10 10¹ 110 10¹ 10° Luminosity (Lo)→ 10 102 10 10 a sic R www 10 9 8 7 6 5 4 -Temperaturex 10¹ (K)
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