What is the orbital period of a bit of matter in an accretion disk that is located 4 ✕ 105 km from a 87 M black hole? Use the circular orbit velocity formula.
Q: TRUE OR FALSE A Black Hole’s singularity has zero radius yet can accommodate infinite mass.
A: SOlution: Is black hole has zero singularity and yet capable of taking all the mass inside.
Q: Dark matter Consider the rotation curves of a galaxy with density profile p(r). Assuming that…
A: The objective of the question is to determine the relationship between the density and radius of a…
Q: hat is the mass of a black hole with a Schwarzschild Radius of 1 AU? Please show w
A:
Q: esc a) 10 points) Gravitational Time Dilation. The escape velocity from the surface (radius r) of a…
A: The objective of the first part of the question is to express the time-dilation fraction, Δt/t, in…
Q: Distances to local galaxies are determined by measuring the brightness of stars, called Cepheid…
A: Absolute brightness is a constant and is 10 parsecs from Earth whereas measured brightness depends…
Q: Prove that at the event horizon of a black hole the time becomes zero or freezes.
A: A black hole is defined as a region in spacetime where the gravitational force is so large that…
Q: The Schwarzschild radius of a black hole is the point at which the escape velocity equals that of…
A: Given, the Schwarzschild radius of a black hole is the point at which the escape velocity equals…
Q: Calculate the mass of black hole with a radius of 20 km.
A: For a blackhole, the radius of the event horizon or the point of no return is defined as the…
Q: Question A5 State the value of the Ricci tensor R on the event horizon of a Schwarzschild black…
A: The objective of the question is to determine the value of the Ricci tensor R on the event horizon…
Q: A particle maintains a circular orbit around a black hole of mass 10 Solar masses at a distance…
A: Given Data The mass of the black hole is:M=10×1.989×1030=1.989×1031 kg The distance is:…
Q: a) Define the term “standard candle” as used in cosmology b). The flux is defined as f(Dlum) = L…
A:
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: An edge-on spectroscopic binary is monitored throughout its orbit. The spectroscopy indicates the…
A: In binary stars, both stars exert gravitational force on each other. Thus, they rotate around a…
Q: Calculate the Schwarzschild radius of an average human weighing 65 kg.
A: When an object crosses its Schwarzschild radius it causes an irreversible gravitational collapse.…
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: The Large Magellanic Cloud is a small satellite galaxy that orbits the Milky Way. It is currently…
A:
Q: (d) Scientists believe the reasons for the difference to be dark matter: Determine the rotational…
A: line indications: Vobserved - Blue Vcalculated - Red VDM - Green
Q: State the value of the Ricci tensor R on the event horizon of a Schwarzschild black hole, and…
A: Required: The value of the Ricci tensor on the event horizon of a Schwarzschild black hole.
Q: An x-ray photon escapes the accretion disk of a black hole of 5 solar masses and a radius of 14.7…
A: As per general relativity due to space-time curvature, the frequency of the photon will reduce as it…
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: 1. (a) Calculate Schwarzschild radius of a blackhole with mass same as our Sun. (S points) (b)…
A: The Schwarzschild radius or gravitational radius is the minimum radius below which an object becomes…
Q: If the accretion disk around a neutron star has a radius of 8 ✕ 105 km, what is the orbital velocity…
A:
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: an introduction on what is the event horizon of a black holes?
A: The occasion horizon of a black hollow is a essential idea in astrophysics that marks the boundary…
Q: Assuming that hydrogen fusion requires the Universe to have a temperature of T > 10’ K (as measured…
A:
Q: The hypervelocity star S5HVS1 has a redshifted Hβ line (rest wavelength of 486.135 nm) observed at…
A:
Q: The radius at which nothing can escape the pull of a black hole is called the ________.
A: The radius at which nothing can escape the pull of a black hole is called the Schwarzschild radius.
Q: Calculate the Schwarzschild radius for the sun and Earth.
A: Every object has a radius within which the gravitational force is so large that it prevents matter…
What is the orbital period of a bit of matter in an accretion disk that is located 4 ✕ 105 km from a 87 M black hole? Use the circular orbit velocity formula.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- A white dwarf in a binary system has a radius of 7000 km and a mass equal (minus an infinitesimal amount) to the Chandrasekhar limit of $1.4 M_{\text {sun }}$. The companion transfers an infinitesimal amount of mass to the white dwarf which is enough to send it over the Chandrasekhar limit and it collapses to a neutron star with a radius of 14 km . Calculate the amount of gravitational potential energy released. NOTE: we can assume that the mass of the neutron star once is triggered and the mass of the WD are both equal to the Chandrasekhar mass in this case.What is the orbital period of a bit of matter in an accretion disk 2 x105 km from a 10-solar-mass black hole?What is the orbital period of a bit of matter in an accretion disk that is located 8 x 10^5 km from a 82 M black hole? (Hint: Use the circular orbit velocity formula, V c = GM/R)
- You discover by dropping particles into it that the Event Horizon (Schwartzschild Radius) of a black hole is 171 km. How massive is it? (enter just the number in solar masses)a)Define the term “standard candle” as used in cosmology. b)The flux is defined asf(Dlum) = L/4πD^2lumwhere L is the absolute luminosity and Dlum is the distance to the radiation source (youmay assume z ≪ 1).Assume that we have measured the flux to be f = 7.234 10^−23 Wm^−2 and the absoluteluminosity is given by L = 3.828 x10^26W. Calculate the luminosity distance D lum to the objectin Mpc.Explain what is meant by the Schwarzschild radius of a black hole. Using a Newtonian approx- imation, derive an expression for the Schwarzschild radius, R, of a black hole of mass MBH- Calculate the Schwarzschild radius for a body with mass equal to the Sun's mass, and express your answer in units of kilometres.
- Event Horizon is a region around a black hole where: group of answer choices: even light cannot escape. all the events are occurring speed of an object is close to speed of light. no physical object can pass through. r nothing can enter .Assume a neutron star has a mass of about 1.2 times the mass of the Sun and a radius of 7 kilometers. If the escape speed is V2esc=2GM/R, work out the formula for the radius of the Event Horizon around a Black Hole of mass M.I understand that to an outside observer, the light from a star that is collapsing into a black hole will become more and more red-shifted as the surface of the star appears to approach the black hole event horizon. The outside observer will never actually see the surface of the star cross the black hole event horizon. This applies to all outside observers: at infinity, in orbit around the star/black hole or those using a rocket to hover above the black hole. Conversely, I know that for someone on the surface of the star that is collapsing to form a black hole it will appear quite different. The observer on the surface will not see anything unusual happen as they cross the event horizon and in a finite time they will reach the singularity at the center of the black hole where we do not know what will happen since general relativity breaks down in a singularity. So, now consider an observer that starts at a great distance from the star who is continually falling directly into the star…
- Imagine you are in an indestructible spaceship orbiting a black hole and you decide to launch a probe into the black hole. Explain how time would pass differently for you and the probe as it is pulled into the black hole. Also, explain what the onboard camera would observe as it passed the photon sphere and the event horizon.Asap, Typed formatAs a mass m of gas falls into a black hole, at most 0.1mc2 is likely to emerge as radiation; the rest is swallowed by the black hole. Show the Eddington luminosity for a black hole of mass M is equivalent to 2*10-9 Mc2yr-1. Explain why we expect the black hole's mass to grow by at least a factor of e every 5*107 years. Where Edding Luminicity is defined as LE=(4piGMmpc)/(sigmaT), where G is the gravitational constant, M is the mass of the black hole, mp is the mass of a proton, c is the speed of light, and sigmaT is Thomson scattering where sigmaT=6.653*10-25 cm2.