8) Calculate the luminosity of a star that has a radius of 3Rs and a temperature of 2Tsum-
Q: 12) Estimate the wavelength of the radiation emitted by an interstellar cloud of 4000 K. nts)
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A: Gravitation.
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A: The more mass the star has faster it burns down and explode into a supernova.
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Q: 29) Estimate the distance to the North Star if it has an absolute magnitude of -3.2 and an apparent…
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Q: A star is observed to be thrice the size of the Sun with temperature of 1.3Tsun. Estimate its…
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A:
Q: Consider a gas of pure ionized hydrogen. Calculate the central pressure of a Sun- like star which is…
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Q: 1) How are luminosity, mass and temperature of a star related?
A:
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Q: 7) The H-alpha line from a star is observed to be 850 nm. Estimate its redshift
A:
Q: List the seven main classes of stars, from hottest to coolest.
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Q: 7) Calculate the luminosity of a star that has a radius of 4.2Rsun and a temperature of 5Tsun
A: Stars generate an immense amount of energy through fusion. The luminosity of a star or a galaxy is…
- The luminosity of a star or a galaxy is defined as the energy radiated by the star or galaxy.
- The luminosity is directly proportional to the temperature. Hotter stars are more luminous than colder stars.
- The luminosity of a star can be defined in terms of the luminosity of the Sun. It is given by,
Here L is the luminosity of the star, LSun is the luminosity of the Sun, R is the radius of the star, RSun is the radius of the Sun, T is the temperature of the star, and TSun is the temperature of the Sun.
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