Describe the principle of hydrostatic equilibrium as it relates to the internal structure of a star.
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Q: The percentage of helium used immediately during a star’s helium flash phase is
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Q: What is hydrostatic equilibrium in stars.
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Q: Box 17-4 Suppose a star experiences an outburst in which its surface temperature doubles but its…
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Q: QUESTION 16 Use the figure shown below to complete the following statement: A low-mass protostar…
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A: Option-E is the correct option.
Q: Describe the spectra for a spectroscopic binary for a system comprised of an F-type and L-type star.…
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- For the PP chain 0.7% of the mass participating in nuclear fusion is liberated as energy which produces a star's luminosity. Assume that the core of a main sequence star consists of 10% of its total mass. Hence, estimate the lifetime of a star on the main sequence in terms of its luminosity L/L. Give your answer in years. You may use the observed mass-luminosity relation L x M³.5, where M is the star's total mass. Using typical values, calculate estimates for the main sequence lifetime of a KO star and a 05 star. Describe briefly why your estimate might be more accurate for K stars compared to O stars.The RR Lyrae stars in a globular cluster have apparent magnitudes of 14. Assuming an absolute visual magnitude of 0.5, calculate how far away is the cluster (in parsecs)? (Hint: Use the Magnitude-Distance Formula: ?=10(??−??+55))What is the relationship between the color of a reflection nebula and the color of the star that illuminates it?
- Suppose a protostar has a luminosity of 39,473 L⊙ and a surface temperature of 4,130 K (Kelvins). What is the radius of this protostar? [Enter your answer as a multiple of the Sun's radius. I.e., if you find R = 20 R⊙ , enter 20. This problem is easier if you start with the relevant equation and create a ratio using the Sun's values. Recall that the Sun has a surface temperature of 5778 K. ]What are the main products of the fusion reactions that take place in low mass main sequence stars?(Answer don't copy with hand written please)As a star runs out of hydrogen to fuel nuclear fusion in its core, changes within the star usually cause it to leave the main sequence, expanding and cooling as it does so. Would a star with a radius 12 times that of the Sun, but a surface temperature 0.5 times that of the Sun, be more, or less luminous than the Sun? Show and explain your reasoning. You may assume the surface area of a sphere is A = 4πr2.