Cepheid measurements in a galaxy at a redshift 0.1 show that it has a distance of 600 Mpc. What i...
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Cepheid measurements in a galaxy at a redshift 0.1 show that it has a distance of 600 Mpc. What i...
2000 Ho=68 km/s MPC + Redshift (km/s) 1000 + + Virgo Cluster + 10 20 Distance...
2000 Ho=68 km/s MPC + Redshift (km/s) 1000 + + Virgo Cluster + 10 20 Distance (Mpc) 0 The universe is expanding according to Edwin Hubble's famous equation v = Hod where v is the velocity of a galaxy at distance d away. Professional astronomers usually talk about Hubble's Constant in the weird units of H, = 70 km/sec/Mpc. This final unit, "Mpo" is the "Megaparsec" and it equals approximately 3 million light years. This is a powerful equation. It...
2000 Ho=68 km/s Mpc * Redshift (km/s) 1000 * Virgo Cluster 0 + + 0 a...
2000 Ho=68 km/s Mpc * Redshift (km/s) 1000 * Virgo Cluster 0 + + 0 a Montenele best 20 10 Distance (Mpc) Part 5/6 Let's now calculate the number of years that is, recalling that one year equals approximately 3 x 107 seconds x 10 നമാലയിൽ രാജി years Terms The universe is expanding according to Edwin Hubble's famous equation Hod where v is the velocity of a galaxy at distance d away. Professional astronomers usually talk about Hubble's Constant in...
2000 Ho=68 km/s MPC Redshift (km/s) 1000 2 ... Virgo Cluster 0 1 - o 20...
2000 Ho=68 km/s MPC Redshift (km/s) 1000 2 ... Virgo Cluster 0 1 - o 20 10 Distance (Mpc) Part 4/6 Now we will use the number of kilometers in a Megaparsec to simplify our calculation of the Age of the Universe. The argument is: 1 1 H. 3 x 1019 70 70 km 70 km BOC 3 x 10 km sec sec Mpe Finish this calculation to discover the number of seconds the universe has existed as indicated by...
2000 Ho=68 km/s Mpc x Redshift (km/s) 1000 + * + Virgo Cluster + + +...
2000 Ho=68 km/s Mpc x Redshift (km/s) 1000 + * + Virgo Cluster + + + 0 10 20 Distance (Mpc) 1 The age of the universe can be estimated by calculating which corresponds to the amount of time it H would take for all the galaxies to get to the distances they are today if they had been moving away from us at the time of the Big Bang with the speeds we measure them to be moving. The...
3. The galaxy cluster Abell 2218 has a mass of about 1.3x1015 Msun and a radius of about 1.5 Mpc....
Answer all of the following questions:
3. The galaxy cluster Abell 2218 has a mass of about 1.3x1015 Msun and a radius of about 1.5 Mpc. a. Estimate the free-fall time, t, for Abell 2218. b. The age of the universe is 13.8 Gyr. Is Abell 2218 gravitationally relaxed and why?
3. The galaxy cluster Abell 2218 has a mass of about 1.3x1015 Msun and a radius of about 1.5 Mpc. a. Estimate the free-fall time, t, for Abell 2218....
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
3. The observed recession velocity of a galaxy is the sum of its Hubble flow velocity,...
3. The observed recession velocity of a galaxy is the sum of its Hubble flow velocity, UH = Hod, and the line-of-sight (LOS) component of its peculiar velocity, vp, due to local gravitational effects. a) Suppose we measure Ho by measuring the distance and redshift for a single galaxy velocity of the galaxy?10 b) At what distance can we measure Ho to 5%? Assume the true value of Ho is 74 kin s-"Mpc-1 and a typical LOS peculiar velocity is...
The observed recession velocity of a galaxy is the sum of its Hubble flow velocity, vH...
The observed recession velocity of a galaxy is the sum of its Hubble flow velocity, vH = H0d, and the line-of-sight (LOS) component of its peculiar velocity, vp, due to local gravitational effects. a) Suppose we measure H0 by measuring the distance and redshift for a single galaxy. Write an expression for how the error in our measurement depends on the peculiar velocity of the galaxy? b) At what distance can we measure H0 to 5%? Assume the true value...
What is the distance of a galaxy with a recession speed of 320,000 km/sec? (use H = 80 km/sec/Mpc) 4,000 km ...
What is the distance of a galaxy with a recession speed of 320,000 km/sec? (use H = 80 km/sec/Mpc) 4,000 km 25,600,000 Mpc 4,000 Mpc 25,600,000 km
The Hubble Parameter The constant describing the rate of this recession, called the Hubble parameterHubble parameterA...
The Hubble Parameter
The constant describing the rate of this recession, called the
Hubble parameterHubble parameterA measure of the rate of expansion
of the universe, which is the average value of the velocity of
recession divided by distance: about 70 km/s/megaparsec. Hubble
parameter A measure of the rate of expansion of the universe, which
is the average value of the velocity of recession divided by
distance: about 70 km/s/megaparsec. , is used to determine the age
and size of the...
2000 Ho=68 km/s MPC + Redshift (km/s) 1000 + + Virgo Cluster + 10 20 Distance (Mpc) 0 The universe is expanding according to Edwin Hubble's famous equation v = Hod where v is the velocity of a galaxy at distance d away. Professional astronomers usually talk about Hubble's Constant in the weird units of H, = 70 km/sec/Mpc. This final unit, "Mpo" is the "Megaparsec" and it equals approximately 3 million light years. This is a powerful equation. It...
2000 Ho=68 km/s Mpc * Redshift (km/s) 1000 * Virgo Cluster 0 + + 0 a Montenele best 20 10 Distance (Mpc) Part 5/6 Let's now calculate the number of years that is, recalling that one year equals approximately 3 x 107 seconds x 10 നമാലയിൽ രാജി years Terms The universe is expanding according to Edwin Hubble's famous equation Hod where v is the velocity of a galaxy at distance d away. Professional astronomers usually talk about Hubble's Constant in...
2000 Ho=68 km/s MPC Redshift (km/s) 1000 2 ... Virgo Cluster 0 1 - o 20 10 Distance (Mpc) Part 4/6 Now we will use the number of kilometers in a Megaparsec to simplify our calculation of the Age of the Universe. The argument is: 1 1 H. 3 x 1019 70 70 km 70 km BOC 3 x 10 km sec sec Mpe Finish this calculation to discover the number of seconds the universe has existed as indicated by...
2000 Ho=68 km/s Mpc x Redshift (km/s) 1000 + * + Virgo Cluster + + + 0 10 20 Distance (Mpc) 1 The age of the universe can be estimated by calculating which corresponds to the amount of time it H would take for all the galaxies to get to the distances they are today if they had been moving away from us at the time of the Big Bang with the speeds we measure them to be moving. The...
Answer all of the following questions:
3. The galaxy cluster Abell 2218 has a mass of about 1.3x1015 Msun and a radius of about 1.5 Mpc. a. Estimate the free-fall time, t, for Abell 2218. b. The age of the universe is 13.8 Gyr. Is Abell 2218 gravitationally relaxed and why?
3. The galaxy cluster Abell 2218 has a mass of about 1.3x1015 Msun and a radius of about 1.5 Mpc. a. Estimate the free-fall time, t, for Abell 2218....
3. The observed recession velocity of a galaxy is the sum of its Hubble flow velocity, UH = Hod, and the line-of-sight (LOS) component of its peculiar velocity, vp, due to local gravitational effects. a) Suppose we measure Ho by measuring the distance and redshift for a single galaxy velocity of the galaxy?10 b) At what distance can we measure Ho to 5%? Assume the true value of Ho is 74 kin s-"Mpc-1 and a typical LOS peculiar velocity is...
The Hubble Parameter
The constant describing the rate of this recession, called the
Hubble parameterHubble parameterA measure of the rate of expansion
of the universe, which is the average value of the velocity of
recession divided by distance: about 70 km/s/megaparsec. Hubble
parameter A measure of the rate of expansion of the universe, which
is the average value of the velocity of recession divided by
distance: about 70 km/s/megaparsec. , is used to determine the age
and size of the...
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