What is the Eddington luminosity of a quasar with a mass of 1 billion Msun ?
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Q: Imagine that an observed distant galaxy is measured to have a distance of 40 Mpc by a Type Ia…
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Q: What is the redshift z of a galaxy 193 Mpc away from us? Note: Assume a value of the Hubble…
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Q: Are changing-look quasars an anomaly and in physically different state or are just edge cases of…
A: Quasars are active galctic nucleus, whose mass is changing milliions or billions times count than…
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: The hydrogen Balmer line H? has a wavelength of 486.1 nm. It is shifted to 536.0 nm in a quasar's…
A: it is question of atomic spectral series. find the number of balmer line for wavelength of 486.1 nm…
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: If a galaxy is receding at 0.05 c, how far away is the galaxy if the Hubble parameter is 70…
A: How far away is the galaxy. speed of galaxyv=0.05 chubble constantH=70 km/sMpc
Q: Calculate how far the quasar is in light years by knowing that distance velocity/Ho. Make the…
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Q: If a galaxy is 500 Mly away from us, how fast do we expect it to be moving and in what direction?
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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: 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: Calculate the critical density of a universe with Hubble constant of 89 km-s¹.Mpc¯¹.
A: It is observed that galaxies are moving away from each other and the farther they are faster they…
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: If a galaxy is 8.6 Mpc away from Earth and recedes at 511 km/s, what is H. (in km/s/Mpc)? 59.42 v…
A: Concept: Since Given itself in the question H∘=59.42 km/s/Mpc Hubble Time is 16500000000 Years. We…
Q: If a galaxy is 9.2 Mpc away from Earth and recedes at 475 km/s, what is H0 (in km/s/Mpc)?
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Q: What is the recession speed of a galaxy cluster which is 50Mpc away from Earth? Is the light from…
A: Hubble Law It state that distant galaxies are moving away from our earth with a recession…
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: The hydrogen Balmer line H, has a wavelength of 486.1 nm. It is shifted to 579.2 nm in a quasar's…
A: The original wavelength of hydrogen Balmer line is given as, λo=486.1 nm. The shifted wavelength of…
Q: The hydrogen Balmer line Hβ has a wavelength of 486.1 nm. It is shifted to 579.8 nm in a quasar's…
A: Redshift is defined as the change in the wavelength due to apparent motion in the quasar spectrum.
Q: Using a value for Hubble's constant of 71 km/s per Mpc, find the recession velocity of a galaxy at a…
A: All observed galaxies were found to be redshifted which meant they were moving away from the Earth.…
Q: A galaxy is observed to be at 10.0 Mpc from Earth. If it is receding at 520 km/s, calculate the…
A: Edwin Hubble in his observations found that the galaxies were moving away from us instead of getting…
Q: What is the name of the radiation process that produces the radio emission in the jets emitted by…
A: Active galaxies are known as quasars. An ordinary galaxy will have about 100,000 times the…
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: What is the redshift z of a galaxy 156 Mpc away from us? Note: Assume a value of the Hubble…
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Q: Is the appearance of a quasar changing over time a sign that it has entered a new physical state, or…
A: Introduction: A quasar (sometimes referred to as a quasi-stellar object, abbreviated QSO) is an A…
Q: Certain spiral galaxy is 10.6 Mpc away from us. How fast in km/s is this galaxy moving away from us?…
A: Given, Distance of Galaxy is = 10.6 Mpc The value of Hubble constant = 71 km/s/Mpc We need to…
Q: why are the shells visible around some elliptical galaxies significant?
A: The shell structures in the elliptical galaxies indicates the extremely low surface brightness and…
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: 3C 273 was the first quasar identified (1963). When we look at its chemical spectrum, we see that…
A: Given:- λobs = 759 nm.λ0 = 656 nm
Q: e of a sphere is "ar, and the mass of the s 3
A: The spherical galaxy average density is given as,
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- Given the age of a universe as 15.6 billion years. A galaxy is found to be moving at 620 km-s-1 from the observer. Calculate the distance between them.Assume a flat Friedmann-Robertson-Walker universe.Calculate the redshift z at which the temperature of the CMB was T = 10 T0, where T0 is thetemperature of the CMB today. Assuming the universe was matter dominated throughout itsevolution, calculate the time at which T = 10 T0 in Gigayears.What is the mechanism for the energy output of quasars?
- ___________ are generally expected to be found at the center of most galaxies. If large amounts of material are accreted onto them, an AGN (active galactic nucleus) can result, causing large jets of gas, dust, and high energy photons.What is the redshift z of a galaxy 186 Mpc away from us? Note: Assume a value of the Hubble constant of 70.0 km/s/MpcCertain spiral galaxy is 8.6 Mpc away from us. How fast in km/s is this galaxy moving away from us? Note: Assume a value of the Hubble constant of 69.1 km/s/Mpc
- Suppose a distant quasar has a redshift of 6. At what fraction of the speed of light is the quasar moving away? z = Δλ/λ = v/cWhat is the redshift z of a galaxy 172 Mpc away from us? Note: Assume a value of the Hubble constant of 71.1 km/s/Mpc Round your answer to three decimal places.What evidence do we have that quasars are a few parsecs or smaller in size?
- The hydrogen Balmer line H, has a wavelength of 486.1 nm. It is shifted to 580.7 nm in a quasar's spectrum. What is the redshift of this quasar? (Hint: What is A2?)4) Calculate the redshift of a galaxy with a recessional velocity of 0.68c. (2The Hydrogen Balmer line ?? has a wavelength of 486.1 nm. This wavelength is shifted to 563.9 nm in the spectrum of quasar 3C 273. Calculate how far is the quasar receding from us? (Hint: Use Doppler formula: ???=Δ??0; ?=3.00 ×105 ??/?).