erstanding the Mass- Luminosity Relation How do we make sense of stellar lifetimes? Mo t(yr) 0.08 1 40 >1x1012 1x1010 3x106 150 3x106
Q: A star has initially a radius of 660000000 m and a period of rotation about its axis of 34 days.…
A: The angular velocity of the object is, ω=2πT (a) The inertia of the sphere is, I=25MR2 The initial…
Q: Find the wavelength of peak intensity for a hot 45000 K star that emits thermal radiation.
A: Given that:Temperature of the hot star : (T) =45000 K Now, From Wien’s displacement Law…
Q: Use the Schwarzchild formula, Rs = 2GM/c2 , where Rs = Radius of the star, in meters, that would…
A:
Q: 3) indicate which locations in the H-R diagram correspond to places where the evolution is slow.…
A: Using the H-R diagram shown the places where the evoultion has been slow is identified.
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: An astronomical image shows two objects that have the same apparent magnitude, i.e., the same…
A: Let the luminosity of the star is Ls= LoLuminosity of Milky Way galaxy, Lm=1011LoLuminosity of…
Q: To find the Sun’s luminosity from its brightness using the inverse-square law, you also had to be…
A: The distance to the sun can be calculated using the method of parallax. Parallax is defined as the…
Q: What is the maximum luminosity for star of 5.76×1010 Msun.
A: In hydrostatic equilibrium, the radiation pressure and gravitational force will balance each other.…
Q: Question A1 a) The Large Magellanic Cloud (LMC) is a galaxy in the vicinity of the Milky Way. It is…
A: Solution/Calculation: a) The Large Magellanic Cloud (LMC) is a galaxy in the vicinity of the Milky…
Q: Which of the following is least reasonable regarding the mass of stars? Group of answer choices…
A: Stars are of different sizes and they have their own set of characteristics based on multiple…
Q: 1. The relative velocities of four stars are shown in the figure below with arrows. If an astronomer…
A: Redshift of a light spectra is the phenomenon when we observe an increase in the wavelength and…
Q: A star has initially a radius of 680000000 m and a period of rotation about its axis of 26 days.…
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Q: What are the a) luminosity and b)wavelength of maximum emission for a star with a surface…
A: Given data Temperature of the star, T=2000 K radius of the star, R=108 m
Q: The CMB contains roughly 400 million photons per m³. The energy of each photon depends on its…
A: The wavelength is 0.0011 m. The energy of a photon is 1.807×10-22 J.
Q: True or False 8. Almost all stars are in binary systems. The book says: "So far you have been…
A: The statement: All stars are in binary systems. The book says: "So far you have been considering the…
Q: What is the orbital period (in s) of a bit of matter in an accretion disk that is located 6 ✕ 105 km…
A: Write the given values with the suitable variables. r=6×105 km=6×108 mM=99Mo=992×1030 kg=198×1030 kg…
Q: The Andromeda Galaxy, M31, is the closest large spiral galaxy to our Milky Way. When we look at its…
A: a) Actual wavelength of Hα line is λactual=656.28 nm observed wavelength λobs=655 nm.
Q: The stars in a binary system are a 4 MO main sequence star and a 1 MO red giant. Explain why this…
A: A binary star system is formed when two stars come close enough to form an orbit around its…
Q: a) (Palen, et. al., 2nd, Problem 45) Rigel has a Hipparcos parallax of 0.00412 arcsec. Given Rigel…
A: Rigel and Betelgeuse are located in the constellation of Orion, which are about 864.3 and 642.5…
Q: Q1 (ints): A0620–00 is an X-ray binary system, there is a normal star and a compact object. For the…
A: A binary system in astronomy consists of two astronomical objects two stars or a star and an…
Q: If the radius of the neutron star is 85.074 km, what is the average density of a neutron star that…
A: To Find : density of neutron star
Q: A 1.4 M. neutron star and a 0.5 M. white dwarf have been found orbiting each other with a period of…
A: The given formula works only if we put quantities in the units given, solar mass, years and…
Q: Stars of the same spectral type have the same: absolute magnitude number temperature luminosity
A: two stars with identical spectra have the same intrinsic luminosity
Q: Choose the statements that correctly describe the characteristics of the stars located in the…
A: Option-E is the correct option.
Q: Given two stars in a binary star a total distance of 16 AU apart and an orbital period of 4 years…
A: Two Masses in the universe attract each other by a gravitational force. This force is directly…
Q: Imagine that you are observing the light from a distant star that is located in a galaxy 100 million…
A: Distance from star to earth d=100 million lightyears. Upon receiving light from this star we are…
Q: Using solar units, we find that a star has 4 times the luminosity of the Sun, a mass 1.25 times the…
A: Let Lo is the luminosity of the sun and Mo is the mass of the sun So from the question, the…
Q: Why does lower mass star live longer that a higher mass star
A: Lower mass star is those stars which have more number of a hydrogen atom in themselves as compared…
Q: Find the speed for a star in which this line appears at wavelength 120.5 nmnm. Express your answer…
A: Given: Wavelength λ = 120.5 nm or 1.205×10-7 m To determine: speed of a star Formula used: v=λc here…
Q: Calculate the redshift of a star if H-ß line of hydrogen from the star is observed to be 800 nm.
A: Redshift happens when the source is moving away from the observer. This will make the observed…
Q: A newly discovered bright star has a luminosity of 78.4×1026 W. What is its temperature if it has a…
A: Given that,Luminosity : L = 78.4×1026Radius : r = 1.2×106 (km)Here we need to find temperature…
Q: Question A4 a) A star has a temperature T = 15000K, mass M = 0.25M and luminosity L = 0.02L. Sketch…
A: **4.4.A circular clarifier has a diameter of 60 ft. If the primary effluent flow is 2 MGD, what is…
Q: RR Lyrae stars have essentially the same luminosity curve, with periods of up to 1 day. False…
A: RR Lyrae stars have essentially same luminousity curve, with periods very less than 1 day.
Q: (Answer don't copy with hand written please)As a star runs out of hydrogen to fuel nuclear fusion in…
A: The luminosity of a star is given by the equation L=σAT4σ is the Stefan-Boltzmann constantA is the…
Explain why lifetime is approximately constant for very massive stars but goes as M-3 for low mass stars
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