What is the Eddington luminosity of a quasar with a mass of 1 billion Msun ?
Q: What evidence is there that quasars occur in distant galaxies? Explain.
A: To explain the correct answer is given below,
Q: (b) Draw the shape of the Milky Way for a spaceship with a velocity of 20%, 50%, and 90% of the…
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Q: What would be the Hubble constant if the universe were 18 billion years old?
A: The age of universe is given as, t = 18 billion years (or) t = 18×109 years TO DETERMINE: The…
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: Distance to Andromeda galaxy is around 2.538 Mly. Calculate its recessional velocity.
A: Our universe is constantly expanding, It was observed by Edwin Hubble when he saw the galaxies…
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: What evidence shows that quasars are ultra-luminous but must be small?
A: Given- What evidence shows that quasars are ultra-luminous but must be small?
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: No, they're not. They're just edge cases of the quasars that aren't pulsing at the moment.
A: Given: Quasars are active galactic nuclei with mass changes measured in millions or billions of…
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: Calculate how far the quasar is in light years by knowing that distance = velocity/Ho. Make the…
A: Given: To find the distance of the quasar in light years is given as,
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: (4) The redshift for Galaxy Y is 6.61e-3. What is the galaxy’s velocity (in km/s)? (just enter the #
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Q: Find the distance to a galaxy whose redshift reveals that it's re- ceding from us at 2.5×104 km/s.
A: As per the Hubble expansion, the universe is expanding. This was observed from the galaxies moving…
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: If the value of the Hubble's constant were found to be 60 km/s/Mpc, what would the Hubble time be?
A: The galaxies in our universe are moving away from each other. This was observed by Edwin Hubble. He…
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: Quasars that change appearance are they physically distinct or merely edge examples of quasars…
A: Give: Quasars are active galctic nuclei whose mass fluctuates by millions or billions of times the…
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: Why do we see most quasars at great distances?
A: In the whole universe Quasar are like those of astronomical object whose luminous comparable to…
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: 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: If the Hα absorption line in the spectrum of a galaxy is observed at a wavelength of 6715 ˚A, at…
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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,
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…
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