what would its period (in s) be if no mass were ejected and a sphere of uniform density can model HD 69830 both before and after?

Q: star with mass m, period Ti = 30 days, and radius ri = 1E4 km collapses into a neutron star (Links…

A: Given that                    The initial radius of the stat ri = 1.0×104Km and             Time…

Q: Consider a star whose density increases toward its center. If we model this star as a series of…

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Q: If the radius of the neutron star is 85.074 km, what is the average density of a neutron star that…

A: mass of the sun, Msun=1.989×1030 kg Radius of the sun, R=85.074 km Volume, V=43πR3

Q: Suppose you observe a star orbiting the Galatic center at a speed of 1000 km/s in a circular orbit…

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Q: Neutron stars, such as the one at the center of the Crab Nebula, have about the same mass as our sun…

A: Weight of the given person on earth is 685 N. Weight of a person on earth is given by the equation…

Q: What is the escape velocity Vesc of a 1.4M⊙ neutron star if its radius is 12 km? Express your answer…

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Q: Determine the mean molecular mass of a star for both the scenario of being completely neutral and…

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Q: After the Sun exhausts its nuclear fuel, its ultimate fate may be to collapse to a white dwarf…

A: (a) The expression for the density of the white dwarf star is, ρ=MV Here, M is the mass of the dwarf…

Q: An AGN is emitting with a luminosity of 2×1040W. The AGN's brightness varies by 10% on a time scale…

A: GivenAn AGN is emitting with a luminosity of 2×1040W. The AGN's brightness varies by 10% on a time…

Q: A cepheid star is located at a distance of 18.7kpc from the Earth and has an apparent visual…

A: Step 1:Step 2:

Q: What is the acceleration of gravity at the surface if the white dwarf has 1.5 the mass of the sun…

A: Given, Mass of white dwarf, Mw=1.5×Ms=1.5×1.989×1030 kg=2.98×1030 kg, and the radius of the white…

Q: 7. If a car was on the highway and was trying to pass another ar and went from a speed of 60 m/s to…

A: Given : vo = 60 m/s v = 75 m/s t = 3 seconds

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: Observations indicate that each galaxy contains a supermassive black hole at its center. These black…

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Q: If the accretion disk around a neutron star has a radius of 8 ✕ 105 km, what is the orbital velocity…

A: Given Data: The radius of the neutron star is r = 8 x 105 km. As we know that the mass of the…

Q: GM What is the orbital period of a bit of matter in an accretion disk that is located 3 x 105 km…

A: Time period was found to be 526 seconds So answer to fill in blank is 526.   Detailed solution is…

Q: Assume a neutron star has a mass of about 1.2 times the mass of the Sun and a radius of 7…

A: Given: Mass of neutron star = 1.2 times mass of sun. Radius of neutron star = 7 km. Diameter of…

Q: The density of Sirius B is 2×106 g/cm3 and its mass is 1.95×1030 kg. What is the radius of the white…

A: The given data are: ρ=2×106 g/cm3=2×109 kg/m3m=1.95×1030 kg Here, ρ and m represent the density and…

Q: An AGN hosts a central Black Hole of mass 2×1038×1038 kg. The AGN emits at 1/51/5 of the Eddington…

A: To find the luminosity of the AGN, we can use the Eddington luminosity formula:L = η * (4 * π * G *…

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: If the accretion disk around a neutron star has a radius of 8 ✕ 105 km, what is the orbital velocity…

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Q: What is the peak wavelength (in nm) of a neutron star's luminosity if its temperature is  106 K?

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Q: What is the free-fall time of a 10 MSun main-sequence star? O 100 hours 10 hours O 1 hour O 0.1…

A: The problem is based upon free fall of a star. Here the given star is having the mass 10 times the…

Q: 38 An AGN hosts a central Black Hole of mass 5×10 kg. The AGN emits at 1/6 of the Eddington limit.…

A: To find the luminosity of the AGN, we first need to calculate the Eddington luminosity (LEdd​) and…

Q: Use the Schwarzchild formulaRs =2GM / c2whereRs = Radius of the star, in meters, that would cause it…

A: Given: Mass of the sun = 2 x 1030 kg.

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: What is the escape velocity (in km/s) from the surface of a 1.6 M, neutron star? From a 3.0 Mo…

A: The mass of the Sun, M⊙=1.99×1030 kg   The radius of the neutron star, r=11 km

Q: The rate at which a nebular cloud rotates increases as the cloud collapses to form systems of stars…

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