Explain how the Hubble law allows you to estimate the distances to galaxies.
Q: Describe a quasar.
A: Quasar is an extremely luminous active galactic nucleus. inside quasar there is a supermassive black…
Q: If a galaxy is 9.0 Mpc away from Earth and recedes at 488 km/s, what is H0 (in km/s/Mpc)? km/s/Mpc…
A: The question above has been given from Hubble's law. This law is also known as the Hubble-Lemaitre…
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: If we find a galaxy that is moving away at 72,000 km/s, what does Hubble’s law tells us about the…
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Q: What started the clumping of matter in the early universe that eventually became the seeds of…
A: The force that is carried by the field of virtual astronomical particles in the quantum field is…
Q: At what redshift will the Lya line (2o = 1215°A) be centered in the Johnson-Cousins U band? (Quasars…
A: From the redshift formula, we have 1+z=λobsλemitz=redshiftλobs=obserevd…
Q: Sombrero Galaxy is classified as a: Sb Sa Irregular galaxy, we cannot see any spiral…
A: Sombrero galaxies are referred to spiral galaxy.
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: Advanced Physics Discuss briefly how i) the value of rotation parameters of the galaxy can be…
A: Advanced Physics Discuss briefly how i) the value of rotation parameters of the galaxy can be…
Q: Which of the following is an accurate statement about quasars?
A: ANS: They are abnormally massive, luminous stars at the cores of ancient galaxies.
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: The flatness problems states that a. the density of the universe is very close to the critical…
A: The flatness problem is a fine tuning problem of cosmology in the Big-Bang theory. Here, density of…
Q: Which of the following might you expect to be an additional consequence of the fact that galaxies…
A: Given Which of the following might you expect to be an additional consequence of the fact that…
Q: 6. If a spiral galaxy is 20' in diameter and you measure its distance to be 1 Mpc, what is its…
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Q: Describe the age and temperature of stars that make up spiral galaxies and their location.
A: A galaxy can be bombarded by other, smaller galaxies. Even if a galaxy is isolated, internal…
Q: A galaxy with a luminosity of 1045 erg si is located at a redshift, z = 1. Calculate the flux of…
A: The luminosity of the galaxy is given as, L=1045 erg/s. The value of redshift is given as, z=1. TO…
Q: Assume that the orbital speed of a star is measured at a distance of 15 kpc from he center of our…
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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 the mass density of the universe is above the critical density as it appears to be with the mass…
A: Given, The mass density of the universe is above the critical density.
Q: The matter density in the Universe today is Pm = kg m-3. What would 2.7 x 10-27 be the value of the…
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Q: 4) Calculate the redshift of a galaxy with a recessional velocity of 0.68c. (
A: When a celestial object is moving away from the observer the light observed from the object will…
Q: Which one of these types of galaxies do you expect to have the largest star formation activity?…
A: A galaxy which has high relative flux density, which shows it has a dense region that helps in more…
7. Explain how the Hubble law allows you to estimate the distances to galaxies.
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- Does Hubble's Law work well for galaxies in the Local Group (such as Andromeda)? No, because dark energy is accelerating the universe's expansion over those distances. No, because we do not know the precise value of Ho. No, because Hubble did not know the Local Group existed when he discovered his law. Yes, it works well for all galaxies. No, because galaxies in the Local Group are bound gravitationally together.The first picture is some background information need help answering the first question about the escape velocity from the andromeda GalaxyHubble's galaxy classification diagram (the "tuning fork") O suggests the existence of black holes O shows how galaxies evolve from one form to another O relates galaxies according to their shapes, but not according to any evolutionary status O explains active galactic nuclei EGO
- 1. What is wave-particle duality? How does it apply to photons and electrons? Why do we not generally observe this in everyday life? 2. What is the Hubble Law? What does it say about the evolution of the universe? What does it have to do with redshift?38. Many RR Lyrae stars are found in open clusters in the plane of the galaxy. True FalseIndicate whether the following statements are true or false. (Select T-True, F-False. If the first is T and the rest F, enterTFFFFF). A) The three main classifications of galaxies are elliptical, spiral and prime.B) The mass of a spiral galaxy can be found from its rotational velocity. The greater the rotation, the greater the mass.C) Galaxies sometimes collide with each other.D) It wasn't until the 1920s that we knew the Milky Way was only one of many galaxies.E) Most galaxies are elliptical.F) The shorter the pulsation period of a Cepheid variable star, the more luminous it is.
- An observational survey of distant galaxies is undertaken that involves measuring their distances using cepheid variables and red-shifts using spectroscopy. Explain how cepheid variables can be used to measure the distances to galaxies. A spectral line is observed whose wavelength in the laboratory is de length of this spectral line observed in each galaxy, Xo, is listed in the table, along with the distance, d, to the galaxy. Determine the red-shift and the recession velocity of each galaxy and tabulate your results by making a copy of the table and filling in the blank spaces. Sketch a Hubble diagram using your results and determine the value of the Hubble constant Ho in units of km s-1 Mpc. 650 nm. The wave- Galaxy 1 652.69 Galaxy 2 Galaxy 3 Galaxy 4 Galaxy 5 653.01 do (nm) d (Mpc) 658.54 662.18 681.63 17 19 54 77 200 v (km s-1)Of the following groupings of galaxies, the one that is largest in size is the a. Local Supercluster. b. Local Group. c. filaments and voids. d. Coma Cluster.