How the Hubble law allows you to estimate the distances to galaxies? Explain
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: How would I calculate the age of the universe in billions of years from the Hubble constant (73.48…
A: Everything that exists resides in the universe, including the Earth, planets, stars, space, and…
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: Indicate whether the following statements are true or false. (Select T-True, F-False. If the first…
A:
Q: Describe a quasar.
A: Quasar is an extremely luminous active galactic nucleus. inside quasar there is a supermassive black…
Q: Using our example from the previous unit, let's try to determine the Hubble time for this example…
A: Solution Given dataSpeed v=4000km/sDistance d=20Mpcwhat would the age of that universe be in…
Q: Please answer within 90 minutes.
A: a. b.
Q: Observations of distant galaxies show O they appear older than they really are. the size of the…
A: We are able to observe because of light reach us from the stars.
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 matter density in the Universe today is ?m=2.7×10−27kgm−3. What would be the value of the…
A: Given that the matter density in the Universe today is 2.7×10-27 kg/m3 and the Hubble constant is 38…
Q: Given the redshift of a galaxy is 0.440 the observed wavelength is 480 nm. What is the actual…
A: When the source of electromagnetic radiation is moving away from the observer the radiation will…
Q: Find the equivalent of Kepler's three laws of motion if the gravita- tional force were to behave…
A:
Q: Problem 3. Consider a flat, single component universe. 1. For a light source at redshift z that is…
A: Given a flat single-component universe. 1.) The Hubble parameter is defined by…
Q: Question A7 Consider the following line element, ds² = - dt² + a² (t) (da² + dy²) + b² (t) dz²,…
A: The objective of the question is to determine whether the given line element obeys the Cosmological…
Q: Explain how the Hubble constant, H0, can be used to make an estimate for the age of the Universe.…
A: Hubble's Law gives us the conclusion that the universe is always expanding. It takes very short…
Q: Based on Figure 1 below, which galaxies are moving away from us the fastest? Velocity (km/sec) 2000…
A: first option is correct
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: What value for the Hubble constant would another galaxy in the universe observe?
A: ANS: c) a unique Hubble constant for that specific location in the universe.
Q: Why can't we see past the cosmological horizon? O The universe extends only to this horizon. O…
A: We can't see past the cosmological horizon because the only things that we saw on the night sky is…
Q: If you find that the Hubble constant is double what we currently believe, how does this affect the…
A: Q) If you find that the Hubble constant is double what we currently believe, how does this affect…
Q: Please answer within 90 minutes.
A: Part (c)Two Pieces of Observational Evidence for Dark Matter:1. Rotation Curves of…
Q: 6) The redshift of a galaxy is observed to be 1.5. Calculate the recessional velocity of the galaxy.
A: Redshift takes place when the source is moving away from the observer. This reduces the frequency…
Q: If a galaxy is 9.0 Mpc away from Earth and recedes at 488 km/s, what is H, (in km/s/Mpc)? | km/s/Mpc…
A: Hubble discovered that galaxies appear to move away from Earth and the velocity of recession (v) is…
Q: Please answer within 90 minutes.
A: c) Calculate the Critical Density of the Universe TodayUsing H0=68 km/s/Mpc: H0=2.20×10−18 s−1…
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: Does Hubble's Law work well for galaxies in the Local Group (such as Andromeda)?
A: Hubble law states that the velocity of the galaxies which are moving away also known as the…
Q: 3. The Androme da Galaxy hasa Muss of around 4x1042 kg and is 24k10" mauay What is you eScaße…
A: mass of galaxy = 4 * 1042 kg d = 2.4 *1 022 m Vescape = 2GM/d
How the Hubble law allows you to estimate the distances to galaxies? Explain.
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- You find a small satellite galaxy orbiting 66 kpc from the center of a larger galaxy at a speed of 210 km/s. What is the total mass of the galaxy-satellite galaxy system? (Give your answer in terms of MSun.)In the reading, you were told that there were roughly 10,000 galaxies in the image of the Hubble Ultra Deep Field alone. The image is roughly 10 square arcminutes and there are roughly 1.5*10^8 square arcminutes composing the entire sky. With that in mind and assuming that the Hubble Ultra Deep Field represents an average part of the sky, roughly how many galaxies may exist in the observable universe? (Please include commas for every factor of 1,000; for example 2,343,567,890)The red-shift of a galaxy observed by us corresponds to a speed of 50000 km/s. How far is the galaxy from us approximately? A. 700 Mpc B. 70 Mpc C. 7 Mpc D. 7 Gpc Is the answer A? Thank you!
- Suppose you have obtained spectra of several galaxies and have measuerd the observed wavelength of the H-Alpha line (rest wavelength = 656.3 nm) to be Galaxy 1: 658.1 nm. Galaxy 2: 667.1 nm. Galaxy 3: 677.6 nm. Assuming a Hubble Constant of 72.5 km/s/Mpc, calculate the distance to each of these galaxies (answer in Mpc)What is the spatial radius of curvature for a hypothetical closed universe at a moment of time with given values below. Give the answer in units of Mpc, to the nearest integer (not in scientific notation - e.g., 1234). Values: H = 51 km s-1 Mpc-1 ρ = 2.9x10-26 kg m-3The Milky Way grew through merging with many smaller galaxies. What are the observational signatures of this process? O The motion of old stars in the bulge and halo of our galaxy are randomly orientated, meaning they were formed from collisions of small, accreted, galaxies all on different paths. O The ordered motion of the bulge / halo stars means that they came from many objects. The random motions of stars in the disk means it was formed from collisions of small, accreted, galaxies. O The motion of young stars in the disk are all in the same direction, meaning they came in as seperate objects.
- For the graph shown above, a) what quantity would you label the y-axis with if the distance is between galaxies and the Earth? Explain your answer. Think through what we know is happening, motion-wise, out there in the galaxy. b) Also explain why you think there are dots and a solid line, on the graph.Distance Based on the graph above, the expansion rate of galaxies near us is than galaxies that are farther away. O faster slower O the same rate VelocityPlease solve page 3 and 4 using the table below NGC NO. Galactic Longitude (deg) Galactic Latitude (deg) Distance from Sun (kpc) Distance (polar view) (kpc) NGC NO. Galactic Longitude (deg) Galactic Latitude (deg) Distance from Sun (kpc) Distance (polar view) (kpc) 1904 227 -30 13 1 1 6402 21 15 9 9 4590 300 36 10 8 6626 8 -6 6 6 5024 333 80 18 3 6637 2 -10 9 9 5272 42 79 10 2 6656 10 -8 3 3 5904 4 47 7 5 6681 3 -12 9 39 6093 353 20 10 9 6356 7 10 15 15 6121 351 16 2 2 6284 358 10 15 15 6171 3 23 6 5 6838 57 -5 4 4 6205 59 41 8 6 6864 20 -26 21 19 6218 16 26 5 5 6981 35 -33 17 14 6254 15 23 4 4 7078 65 -27 10 9 6266 354 7 7 7 7089 53 -36 12 10 6273 357 9 9 9 7099 27 -47 8 5…