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Betelgeuse, a bright red star in the constellation Orion, has a luminosity that is 100,000 times...
The bright star Betelgeuse in the constellation Orion emits the greatest intensity of radiation at a...
The bright star Betelgeuse in the constellation Orion emits the greatest intensity of radiation at a wavelength of 808 nm. Calculate the surface temperature of the star.
“Bellatrix” (γ Orionis; HD 35468) is a bright star in the constellation Orion and has the...
“Bellatrix” (γ Orionis; HD 35468) is a bright star in the constellation Orion and has the following properties: Surface Temperature = 22,000 K Radius = 6.0 R⊙ Mass = 8.5 M ⊙ (a) Calculate the luminosity of Bellatrix in terms of Solar luminosities ( ). (b) Assuming that Bellatrix is powered by the proton-proton chain in its core, how much hydrogen does Bellatrix consume each second? Express your answer in units of kg. (c) At this rate, how long would...
6. The bright star Arcturus in the constellation Boötes has a surface temperature about 0.74 times...
6. The bright star Arcturus in the constellation Boötes has a surface temperature about 0.74 times that of the Sun. Its luminosity is about 170 times that of the Sun. (a) What is Arcturus’ radius compared to the radius of the Sun (in units of solar radii, ?⊙)? (b) What type of star is Arcturus (a dwarf, a giant, or a supergiant)? Explain your reasoning.
Find the radius RRigel of the star Rigel, the bright blue star in the constellation Orion...
Find the radius RRigel of the star Rigel, the bright blue star in the constellation Orion that radiates energy at a rate of 2.7×1031W and has a surface temperature of 11,000 K. Assume that the star is spherical. Use σ=5.67×10−8W/m2⋅K4 for the Stefan-Boltzmann constant and express your answer numerically in meters to two significant figures.
Stellar RadiiThe red supergiant (RSG) star Betelgeuse has a luminosity of 120,000L, and a surface temperature...
Stellar RadiiThe red supergiant (RSG) star Betelgeuse has a luminosity of 120,000L, and a surface temperature ofaboutTeff= 3650 K. What is its’ radius (in both metres and astronomical units)?
Betelgeuse - the right shoulder star of Orion - is a red giant star. Its radiation...
Betelgeuse - the right shoulder star of Orion - is a red giant star. Its radiation peaks in the infrared at ? = 800 nm. What is the surface temperature of the star?
A red giant star has a temperature of 4500 K and a luminosity of 10700 LSun....
A red giant star has a temperature of 4500 K and a luminosity of 10700 LSun. How many times bigger is this star than the Sun?
What star is 20 pc from Earth, has a luminosity of 160 times that of the...
What star is 20 pc from Earth, has a luminosity of 160 times that of the Sun, a surface temperature of 4000 K, and has an absolute magnitude of -0.066? How would I figure this out?
2. An O-type star, such as some of the bright young stars in the Orion Nebula,...
2. An O-type star, such as some of the bright young stars in the Orion Nebula, has a surface temperature of roughly 60,000 K. At what wavelength does an O star’s spectrum peak? In what part of the electromagnetic spectrum is this wavelength (e.g. infrared, visible, radio)?
The hot glowing surfaces of stars emit energy in the form of electromagnetic radiation. It is...
The hot glowing surfaces of stars emit energy in the form of electromagnetic radiation. It is a good approximation to assume that the Emissivity e is equal to 1 for these surfaces. Find the radius RRigel of the star Rigel, the bright blue star in the constellation Orion that radiates energy at a rate of 2.7 x 1031 W and has a surface temperature of 11,000 K. Assume that the star is spherical Use σ = 5.67 × 10-8 w/m2-K4...
The hot glowing surfaces of stars emit energy in the form of electromagnetic radiation. It is a good approximation to assume that the Emissivity e is equal to 1 for these surfaces. Find the radius RRigel of the star Rigel, the bright blue star in the constellation Orion that radiates energy at a rate of 2.7 x 1031 W and has a surface temperature of 11,000 K. Assume that the star is spherical Use σ = 5.67 × 10-8 w/m2-K4...
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