Consider a galaxy with a flat rotation curve of circular velocity vc=250 km/s. What is the...
Consider a galaxy with a flat rotation curve of circular velocity vc=250 km/s. What is the epicyclic frequency at a distance R = 7 kpc? (Express your answer in units km/s/kpc.)
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Consider a galaxy with a flat rotation curve of circular
velocity vc=250 km/s. What is the...
3. The Milky Way's Dark Matter Halo The Milky Way's rotation curve is approximately a constant, v...
3. The Milky Way's Dark Matter Halo The Milky Way's rotation curve is approximately a constant, v(r) ~220 km/s, for 5 20 kpc, This constant circular velocity cannot be explained by the observed distribution of luminous mass Instead, we propose that the Milky Way is embedded in a roughly spherical dark matter halo. (a) Calculate M(r), the enclosed mass of the spherical dark matter halo as a function of r in the range 5< T < 20 kpc, assuming the...
Andromeda Galaxy, M31, is considered a sister galaxy to Milky Way galaxy. One similarirty is their...
Andromeda Galaxy, M31, is considered a sister galaxy to Milky Way galaxy. One similarirty is their masses (a) Astronomers have used orbiting satellite galaxies to calculate the mass. At a distance of 190 kpc from the center of M31, the circular velocity of these objects is 150 km/s. Using the measurements and tools that astronomers use, calculate the total mass of M31 in units of the mass of the Sun, M. Watch your units in your calculations! Here are few...
a) A galaxy cluster has a recessional velocity of 44,000 km/s. Using the best estimate for...
a) A galaxy cluster has a recessional velocity of 44,000 km/s. Using the best estimate for Hubble's constant, find the distance to the galaxy cluster. ____________ Mpc b) Suppose the Hubble constant had a value of H= 145 km/s/Mpc. What would be the age of the universe? __________ billion years c) What if H had a value of 35 km/s/Mpc? ____________ billion years
s A point source directly behind a galaxy, at double the observer-gala tationally lensed by the galaxy's potential...
s A point source directly behind a galaxy, at double the observer-gala tationally lensed by the galaxy's potential into an Einstein ring. The symmetic, and has a fiat rotation curve, vi) -e. The bending angle ing through a spherical mass distribution with imact parameter r from the distib distance d, is gra Answer 2.4 x 10 a light center is 4GMicr) where M(cr) is the mass enclosed within r a Find the angular radius y of the Einstein ring, in...
A. The Sun travels in a circular orbit at a velocity of 220 km/second at a...
A. The Sun travels in a circular orbit at a velocity of 220 km/second at a distance of 8.0 kiloparsecs from the center of the Galaxy (note that these numbers are slightly different from those in your book). Calculate the number of years it takes the Sun to complete an orbit (i.e., the circumference of a circle with an 8.0 kiloparsec radius) around the center of the Galaxy. (There are 3.1 x 1013 kilometers/parsec and 3.2 x 107 seconds/year.) B....
A car races at a constant speed of 370 km/h around a flat, circular track 1.30...
A car races at a constant speed of 370 km/h around a flat, circular track 1.30 km in diameter. 1) What is the magnitude of the car's radial acceleration in m/s2? (Express your answer to two significant figures.)
this pic will helpful upper one is not clear 1.For Galaxy M87 calculate the distance d in Mpc and recessional velocity vr in km/s. Put your answers separated by a comma. 2.For Galaxy M60 calculate th...
this pic will helpful upper one
is not clear
1.For Galaxy M87 calculate the distance d in Mpc and recessional
velocity vr in km/s. Put your answers separated by a comma.
2.For Galaxy M60 calculate the distance d in Mpc and recessional
velocity vr km/s. Put your answers separated by a comma.
3.For Galaxy M104 calculate the distance d in Mpc and
recessional velocity vr km/s. Put your answers separated by a
comma.
4.For Galaxy M95 calculate the distance d...
The car travels along the circular curve having a radius r = 400 ft. At the...
The car travels along the circular curve having a radius r = 400 ft. At the instant shown, its angular rate of rotation is θ˙ = 0.025 rad/s, which is decreasing at the rate θ¨ = -0.008 rad/s2. Part A Part complete Determine the radial component of the car's velocity at this instant. Express your answer with the appropriate units. -- SubmitPrevious AnswersRequest Answer Incorrect; Try Again; 5 attempts remaining Part B Part complete Determine the transverse component of the...
The car travels along the circular curve of radiusr 400 ft with a constant speed of...
The car travels along the circular curve of radiusr 400 ft with a constant speed of U = 30 ft/s .(Figure 1) ▼ Part A Determine the angular rate of rotation θ of the radial line r Express your answer with the appropriate units. Figure 1 of 1 Value Units Submit Request Answer ▼ Part B r=400 ft Determine the magnitude of the car's acceleration Express your answer with the appropriate units. a= 1 Value 1 Units
For this problem assume that the stars in the Milky Way are in circular orbits in...
For this problem assume that the stars in the Milky Way are in circular orbits in the plane of the galaxy with speedy(r), where r measures the distance from the galactic center. 1. The inner portions of the Milky Way rotate as a solid body, meaning that the angular velocity ω is constant. ωΞω0 What does this imply about how the orbital (rotational) velocity as a function of distance from the galactic cen Using Newton's laws of motion (balance centripetal...
3. The Milky Way's Dark Matter Halo The Milky Way's rotation curve is approximately a constant, v(r) ~220 km/s, for 5 20 kpc, This constant circular velocity cannot be explained by the observed distribution of luminous mass Instead, we propose that the Milky Way is embedded in a roughly spherical dark matter halo. (a) Calculate M(r), the enclosed mass of the spherical dark matter halo as a function of r in the range 5< T < 20 kpc, assuming the...
s A point source directly behind a galaxy, at double the observer-gala tationally lensed by the galaxy's potential into an Einstein ring. The symmetic, and has a fiat rotation curve, vi) -e. The bending angle ing through a spherical mass distribution with imact parameter r from the distib distance d, is gra Answer 2.4 x 10 a light center is 4GMicr) where M(cr) is the mass enclosed within r a Find the angular radius y of the Einstein ring, in...
this pic will helpful upper one
is not clear
1.For Galaxy M87 calculate the distance d in Mpc and recessional
velocity vr in km/s. Put your answers separated by a comma.
2.For Galaxy M60 calculate the distance d in Mpc and recessional
velocity vr km/s. Put your answers separated by a comma.
3.For Galaxy M104 calculate the distance d in Mpc and
recessional velocity vr km/s. Put your answers separated by a
comma.
4.For Galaxy M95 calculate the distance d...
The car travels along the circular curve of radiusr 400 ft with a constant speed of U = 30 ft/s .(Figure 1) ▼ Part A Determine the angular rate of rotation θ of the radial line r Express your answer with the appropriate units. Figure 1 of 1 Value Units Submit Request Answer ▼ Part B r=400 ft Determine the magnitude of the car's acceleration Express your answer with the appropriate units. a= 1 Value 1 Units
For this problem assume that the stars in the Milky Way are in circular orbits in the plane of the galaxy with speedy(r), where r measures the distance from the galactic center. 1. The inner portions of the Milky Way rotate as a solid body, meaning that the angular velocity ω is constant. ωΞω0 What does this imply about how the orbital (rotational) velocity as a function of distance from the galactic cen Using Newton's laws of motion (balance centripetal...
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