Calculate the luminosity of an 8 solar mass star.
Q: of a star occur
A: Possible stages of a star that occurs are as follows:
Q: The mass-luminosity relation describes the mathematical relationship between luminosity and mass for…
A: L/Lo = (M/Mo )3.5 here the luminosity is to be found in terms of Lo M = 4Mo
Q: A pulsating variable star with a period of 10 days would be a Cepheid having an absolute magnitude…
A: Pulsating variable star are made by expansion and contractions in the outer layers of any stars. Due…
Q: This star has a mass of 3.3 MSun. What is the main sequence lifetime of this star? You may assume…
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Q: What are the approximate spectral type, temperature, absolute magnitude number, and luminosity of…
A: Required : Spectral type, absolute magnitude, temperature and luminosity of star E.
Q: For each type of stellar explosion, identify its progenitor star
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Q: What is the life expectancy of a 2-solar-mass star?
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Q: A newly discovered bright star has a luminosity of 78.4×1026 W. What is its temperature if it has a…
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Q: Describe the forces acting on a star during the main sequence period of its life?
A: A star has its gravity, and due to the hot core of a star, it creates pressure within the gas. Two…
Q: If a neutron star has a radius of 9.12 km and a temperature of 3.63 x 106 K, how luminous is it in…
A: 1)Using stefan's lawP = σ A T4Where P is the power σ is the stefan's constant A is the area of…
Q: A white dwarf star has a visual luminosity of 0.046LSun. If you were 1 AU from the white dwarf, what…
A: Ldwarf = 0.046Lsun Distance d = 1 AU = 1.496×1011 m Lsun = 3.827×1026 W
Q: Explain how hydrostatic equilibrium and the star's internal structure are linked.
A: It is to be explained that how the hydrostatic equilibrium and the star's internal structure are…
Q: A star is observed to be thrice the size of the Sun with temperature of 1.3Tsun. Estimate its…
A: The energy radiated by a star is defined as its luminosity. Luminosity depends on the temperature…
Q: What is the luminosity, in solar units, of a brown dwarf whose radius is 0.1 solar radii and whose…
A: Luminosity of a star or an object is the total amount of energy radiated per second by that object.…
Q: Why does the luminosity of a star depend on both its radius and its temperature?
A: Luminosity is the radiant power emitted by star. The luminosity is measured in Watt or Joules per…
Q: Mention a method to measure temperature of a star.
A: Temperature of the stars cannot be measured directly as they are very far.
Q: Main sequence star A is 5 times as massive as main sequence star B. How do the main sequence…
A: Main sequence stars are those which fuse hydrogen atoms in their core to form helium. They have a…
Q: What is the luminosity of a star having three times the radius of the Sun and a surface temperature…
A: The luminosity of a star is a measure of the total amount of energy that is radiated by a star per…
Q: What is the total mass of a visual binary system if the average separation of the stars is 8 AU and…
A: A binary system is formed when two astronomical objects come close enough to start orbiting each…
Q: What is the mass of a star with a main-sequence lifetime of 4 billion years? 17 X solar masses
A: According to stellar theories & observations the average lifetime of main-sequence stars has…
Q: Vega has Mv = 0.5. How large is Mbol? Calculate the luminosity of Vega. Remember that Mbolo = 4.75.…
A: Given information": The absolute visible magnitude of Vega (Mv) = 0.5 The Spectral class of Vega is…
Q: Describe what would happen to the luminosity of a star if its temperature doubles and its radius…
A: Luminosity of a star depends on both temperature and radius. L ∝ R2 T4
Q: A newly discovered bright star has a luminosity of 78.4×1026 W. What is its temperature if it has a…
A:
Q: Why don't red dwarfs become giant stars?
A: Red dwarf stars or M-type stars are small stars with a mass of 0.08 to 0.6 times the mass of the…
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Q: Why does the orbital period of a binary star depend on its mass?
A: A binary system is formed when two massive astronomical objects start orbiting each other around a…
Q: A star has a parallax angle of 0.0270 arcseconds and an apparent magnitude of 4.641. The distance to…
A: Given, Parallax angle is 0.0270 arcseconds apparent magnitude of 4.641 distance is 37.03 parsecs…
Q: A distant F0 star is 6.3 times less bright than a nearer F0 star which has a parallax of 0.2…
A: Given: p=0.2 arcsec The distance of the distant F0 star from the nearer F0 star is : d=1p=10.2=5…
Q: Find the wavelength of peak intensity for a hot 45000 K star that emits thermal radiation.
A: Given information:Temperature of the object (T) = 45000 K
Q: What is the difference between type I and type II supernovae
A: To determine Difference between type I and type II supernovae
Q: If a T Tauri star is the same temperature as the sun but is ten times more luminous, what is its…
A: The energy radiated by a star per second is known as its luminosity and is directly proportional to…
Q: What did you calculate for the radius of the star that had a temperature of 5880 degrees Kelvin and…
A: Given : Temperature=T=5880∘ K Luminosity=L=78 W We have to calculate the value of radius R of the…
Q: What is the life expectancy of a 16-solar-mass star?
A: Stars are formed due to the gravitational collapse of interstellar gases which contain mostly…
Q: What is the luminosity of a 4-solar-mass main-sequence star?
A: The luminosity of a star is the amount of energy that it radiates per second. It can be considered…
Q: why are Cepheid variable stars good distance indicators? What about supernovae?
A: Named after delta-Cephei, Cepheid Variables are the most important type of variable because it has…
Q: describing the various stages in the life of a 1.0 solar mass star, 0.5 solar mass star, and a 3.0…
A: In this question we have to describe the life of a 0.5, 1.0 and 3.0 solar mass stars.
Q: a star with a radius of 12 that of the sun but a surface temperature of 0.5 times that of the sun be…
A: The luminosity of a star can be given by Stefan-Boltzmann's law as L=σAT4σ is Stefan-Boltzmann…
Q: Describe the spectra for a spectroscopic binary for a system comprised of an F-type and L-type star.…
A: Given Describe the spectra for a spectroscopic binary for a system comprised of an F-type and L-type…
Q: Why is it that we can describe the life cycle of a star and be confident about it?
A: It is required to describe how we can get an idea about the life cycle of a star.
Q: Describe how energy generated in the core of a 1-solar-mass star gets to the star's surface.
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- Two stars-A and B, of luminosities 0.5 and 4.5 times the observed to have the luminosity of the Sun, respectively-are same apparent brightness. Which star is more distant, and how much farther away is it than the other?Calculate the luminosity of the star with an apparent magnitude of 2. Given the Sun has an apparent magnitude of -26.57 and 3.9 × 1026 W luminosity.A red giant star has a temperature of 3900 K and a luminosity of 13600 LSun. How many times bigger is this star than the Sun? Hint: You need the surface temperature of the sun for this problem. Use the value in the book, 5800K.
- A certain star has a temperature twice that of the Sun and a luminosity 64 times greater than the solar value. What is its radius, in solar units?what is the mass of a star with a main- sequence lifetime of 3 billion yearsWhat is the luminosity of a star having four times the radius of the Sun and a surface temperature of 8,000 K?
- What is the total mass of a visual binary system if the average separation of the stars is 7.1 AU and their orbital period is 12 years?In the star clusters shown, which one is younger and why?Given the distance to a star is 276394.84AU, and its apparent magnitude is 4.74. What is the luminosity of the star?
- A star has a radius of 2RO and has a temperature of 3TO. Calculate the luminosity in solar units.Why are red dwarfs very dim.Consider two stars on the main sequence, A and B. Star A has a mass of 4 M⊙. Star B has a mass of 0.8 M⊙. By what factor is the luminosity of star A greater than the luminosity of star B?