How many of you have been caught in a massive traffic jam on the NJ Turnpike or interstate only to find out that the volume of traffic and not an accident caused the backup? You experienced a density wave. How are density waves crucial to forming spiral galaxy arms?
Q: What evidence is there that quasars occur in distant galaxies? Explain.
A: To explain the correct answer is given below,
Q: You have discovered a galaxies which is extremely red. Based on the redshift of this galaxy, you…
A: This problem is based on the Hubble’s law. According to this law, we have the following expression.…
Q: The figure below is based on an assumed Hubble constant of 70 km/s/Mpc. How would you change the…
A: Given Hubble constant velocity = 70 km/s/Mpc
Q: Describe a quasar.
A: Quasar is an extremely luminous active galactic nucleus. inside quasar there is a supermassive black…
Q: Imagine that an observed distant galaxy is measured to have a distance of 40 Mpc by a Type Ia…
A:
Q: What is the redshift z of a galaxy 193 Mpc away from us? Note: Assume a value of the Hubble…
A:
Q: Calculate the redshift associated with a galaxy with a recessional velocity of 0.916c.
A: The change in frequency when observer and source are in relative motion is called the Doppler…
Q: Consider a universe in which the Hubble constant has been measured to have the value H0 = 50…
A: Hubble's law gives the idea that the universe is continuously expanding, and that galaxies are…
Q: Calculate the distance to a galaxy that is moving away at 1000 km.9s-1. Given the Hubble time as…
A: Hubble time is defined as the time it took a universe to reach its current state, given that…
Q: Explain how the temperature of hot gas can be used to find out about the gravitational pull of a…
A: Given: The hot gas temperature which is used to find the gravitational pull To find: The explanation…
Q: The redshift of a galaxy is observed to be 0.5. Calculate the recessional velocity of the galaxy.
A: When a light source moves away from the observer the wavelength will shift towards the red region of…
Q: Suppose that we were to discover that all galaxies are actually twice as far away as we think. How…
A:
Q: What Hubble constant corresponds to an approximate age of the universe of 1010 y? To get an…
A:
Q: what are some fundamental properties of late type galaxies that our theories of galaxy formation…
A: All those galaxies which are included under Spiral and Irregular Galaxies are termed as Late Type…
Q: A galaxy is 30 Mpc away from us and has a recession velocity of 2000 km.s-1 . What is Hubble’s…
A:
Q: propose an explanation for the lack of gas, dust, and young stars in elliptical galaxies.
A: The elliptical galaxies are old and dim galaxies. The stars in the elliptical galaxies give out red…
Q: Describe the differences between Seyfert 1 and Seyfert 2 galaxies.
A: the problem is based on the concept of astronomy. The problem mainly deals with types of galaxies…
Q: A quasar has a redshift of 3.81. What is the recession velocity of this quasar in meters per second?…
A: Givenz=3.81 (redshift) formula for redshiftz=(c+v)(c-v)-1wherec=speed of…
Q: If the active core of a galaxy contains a black hole of 106 M, what will the orbital period be for…
A: The expression for the orbital period, T=2πrv =2πrGMr =2πr32GM
Q: Suppose that while analysing the optical spectrum of a galaxy, you observe the Hα absorption line to…
A: Given: The wavelength observed of the absorption line is, The rest wavelength of this line is, The…
Q: Recall that Hubbleʹs law is written v = H0d, where v is the recession velocity of a galaxy located a…
A: Data provided: H0 = 80 km/Mpc Distance (d) = 800 Mpc Required: Velocity of the galaxy (v)
Q: Assume that the number density of stars in the Milky Way is 0.14 pc-3. (e) There are 10" stars…
A: Given, Number density of star is, ρ = 0.14 pc-3 Total number of stars in galaxy, N=1011 Let d is the…
Q: What is the redshift z of a galaxy 156 Mpc away from us? Note: Assume a value of the Hubble…
A:
Q: Consider a universe in which the Hubble constant has been measured to have the value Ho = 50…
A: Given: The measured value of the Hubble constant is H0 = 50 km / s / Mpc
Q: 1. What is the total energy output of a radio galaxy in the local Universe (at z = 0.1) with a flux…
A:
Q: The presence of neutral hydrogen in galaxies will be observed with the SKA through the redshifted…
A: Given Data: Rest frame frequency=1420MHz Redshift z=0.5 To Find: The frequency would we need to look…
Q: Calculate the Hubble time for a universe with a Hubble constant of sixty kilometers per second per…
A: Given:Hubble's constant, Ho = 60km/(s Mpc)Asked:Hubble's Time, tH = ?
Q: Observations of the central region of the galaxy M87 indicate that stars which are 60 light years…
A:
Q: Why aren’t the fluctuations there in the formation of Galaxies and other similar entities?
A: Galaxies and the other similar entities could not be without the existence of fluctuations in the…
Q: Use the redshift of 3.8 for 4C41.17, a powerful radio galaxy, to determine the distance of the…
A: (a) the speed of the galaxy is, vc=z+12-1z+12+1vc=3.8+12-13.8+12+1=0.917v=0.9173×105 km/s=2.75×105…
Q: How can you explain the fact that the Andromeda Galaxy appears to be approaching us rather than…
A: Each element emits photons only at a certain wavelength. They form either emission or absorption…
Q: Consider a supermassive black hole near the center of a galaxy. Calculate the radius of such an…
A: A supermassive black hole is a black hole that has its mass in the range between 105 to 1010 solar…
Q: Assume a flat Friedmann-Robertson-Walker universe. Calculate the redshift z at which the temperature…
A:
Q: If most galaxies are moving away from us, are we at the center of the universe? Why or why not?
A: Introduction: The universe encompasses everything in existence, from the smallest atom to the…
Q: What is the redshift z of a galaxy 186 Mpc away from us? Note: Assume a value of the Hubble…
A: Hubble's law, also known as Hubble- Lemaitre law states that the velocity of the galaxy, also called…
Q: What is the redshift z of a galaxy 172 Mpc away from us? Note: Assume a value of the Hubble…
A:
Q: Why do we not see quasars near our galaxy?
A: Introduction: The word quasar stands for quasi-stellar radio source because the signals came from…
Q: Calculate the critical density necessary for a closed universe for two extremes of the Hubble…
A: The critical density necessary for a closed universe for two extremes of the Hubble constant. given,…
Q: Calculate the Hubble time for a universe with a Hubble constant of 60 km-s-1-Mpc-1.
A: Edwin Hubble observed that the galaxies were moving away from us. He calculated their recession…
Q: If the universe had a density equal to its estimated critical density of 9= 10-30 g/cm3, and if it…
A: Given Critical density ρc = 9×10-30 g/cm3 Mass (M) = 2.0 × 1030 kg
Q: On a rotation curve you notice two points, A and B. Point B is twice as far from the center of the…
A: Given information: Point B is twice as far from the center of the galaxy as point A. Let "ra" be the…
Q: Which of the following best describe the reasons we have to infer that a supermassive blackhole…
A: Actually the blackhole is a very higher density object . According to the general theory of…
Q: A galaxy at redshift z has an infrared luminosity of LIR. What is the approximate star formation…
A:
Q: What is the Eddington luminosity of a quasar with a mass of 1 billion Msun ?
A: Eddington luminosity or Eddington limit is the maximum luminosity that can be achieved by a star in…
- How many of you have been caught in a massive traffic jam on the NJ Turnpike or interstate only to find out that the volume of traffic and not an accident caused the backup? You experienced a density wave. How are density waves crucial to forming spiral galaxy arms?
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
