The distant quasar ULAS J1120+0641 has a luminosity 6 × 1013 Le. Assuming it is at its Eddington limit, what is its mass (in solar masses)?

A) 30,000 B) 2 million C) 2 billion D) 6 billion A) 30,000 B) 2 million C) 2 billion D) 6 billion

Exam 24: Quasars and Active Galaxies

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Suppose a distant quasar has a redshift of z = 0.3. To obtain the correct value of the distance at which one sees the object, one must use the relativistic formulas. These give an answer of 1020 Mpc. For comparison, what answer does the nonrelativistic calculation give?

(Multiple Choice)

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Question 61

At what distance do we see a quasar having a redshift of z = 3.0? (See Figure 24-4 of Universe, 11th ed.(in the text))

(Multiple Choice)

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Question 62

Why are there no nearby (and thus "young") quasars?

(Multiple Choice)

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Question 63

The distant quasar ULAS J1120+0641 has a luminosity 6 × 10¹³ L_e. Assuming it is at its Eddington limit, what is its mass (in solar masses)?

(Multiple Choice)

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Question 64

Which observational fact about quasars and their behavior is perhaps the most extraordinary?

(Multiple Choice)

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Question 65

All quasars appear to be:

(Multiple Choice)

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Question 66

A starlike object showing an almost featureless continuum spectrum would be a:

(Multiple Choice)

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Question 67

Active galaxies include each of the following EXCEPT:

(Multiple Choice)

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Question 68

The luminosity of the Milky Way Galaxy is about 3 × 10¹⁰ L_e. Suppose all of this luminosity is due to a black hole and accretion disk at the center of the galaxy that is assumed to be at its Eddington limit. What would this suggest the mass is of this black hole (in solar masses)?

(Multiple Choice)

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Question 69

The spectrum of the quasar PKS 2000-330 contains the UV Lyman L_α line (λ₀ = 121.6 nm), which has been shifted into the visible region of the spectrum by a redshift of z = 3.773. What is the shift, Δλ₀, of this radiation in nanometers?

(Multiple Choice)

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Question 70

Seyfert galaxies were once considered to be a distinct class of galaxies because they:

(Multiple Choice)

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Question 71

The quasar PKS 1247+3406 has a redshift z = 4.897. What is its recession speed away from our galaxy?

(Multiple Choice)

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Question 72

The redshift of quasar 3C 273 is z = 0.158. What is the wavelength of the H $\gamma$ line ( $\lambda$ ₀ = 434 nm) in the spectrum of this quasar?

(Multiple Choice)

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Question 73

Showing 61 - 73 of 73

Suppose a distant quasar has a redshift of z = 0.3. To obtain the correct value of the distance at which one sees the object, one must use the relativistic formulas. These give an answer of 1020 Mpc. For comparison, what answer does the nonrelativistic calculation give?

At what distance do we see a quasar having a redshift of z = 3.0? (See Figure 24-4 of Universe, 11th ed.(in the text))

Why are there no nearby (and thus "young") quasars?

The distant quasar ULAS J1120+0641 has a luminosity 6 × 10¹³ L_e. Assuming it is at its Eddington limit, what is its mass (in solar masses)?

Which observational fact about quasars and their behavior is perhaps the most extraordinary?

All quasars appear to be:

A starlike object showing an almost featureless continuum spectrum would be a:

Active galaxies include each of the following EXCEPT:

The luminosity of the Milky Way Galaxy is about 3 × 10¹⁰ L_e. Suppose all of this luminosity is due to a black hole and accretion disk at the center of the galaxy that is assumed to be at its Eddington limit. What would this suggest the mass is of this black hole (in solar masses)?

The spectrum of the quasar PKS 2000-330 contains the UV Lyman L_α line (λ₀ = 121.6 nm), which has been shifted into the visible region of the spectrum by a redshift of z = 3.773. What is the shift, Δλ₀, of this radiation in nanometers?

Seyfert galaxies were once considered to be a distinct class of galaxies because they:

The quasar PKS 1247+3406 has a redshift z = 4.897. What is its recession speed away from our galaxy?

The redshift of quasar 3C 273 is z = 0.158. What is the wavelength of the H $\gamma$ line ( $\lambda$ ₀ = 434 nm) in the spectrum of this quasar?

Astronomy and the Universe

Knowing the Heavens

Eclipses and the Motion of the Moon

Gravitation and the Waltz of the Planets

The Nature of Light

Optics and Telescopes

Comparative Planetology I: Our Solar System

Comparative Planetology II: the Origin of Our Solar System

The Living Earth

Our Barren Moon

Mercury, Venus, and Mars: Terrestrial, yet Unique

Jupiter and Saturn: Lords of the Planets

Jupiter and Saturns Satellites of Fire and Ice

Uranus, Neptune, Pluto, and the Kuiper Belt: Remote Worlds

Asteroids, Comets, and Impacts

Our Star, the Sun

The Nature of the Stars

The Birth of Stars

Stellar Evolution: on and After the Main Sequence

Stellar Evolution: The Death of Stars

Stellar Remnants: Neutron Stars and Black Holes

Our Galaxy

Galaxies

Cosmology: The Origin and Evolution of the Universe

Exploring the Early Universe

The Search for Extraterrestrial Life

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Exam 24: Quasars and Active Galaxies

Suppose a distant quasar has a redshift of z = 0.3. To obtain the correct value of the distance at which one sees the object, one must use the relativistic formulas. These give an answer of 1020 Mpc. For comparison, what answer does the nonrelativistic calculation give?

At what distance do we see a quasar having a redshift of z = 3.0? (See Figure 24-4 of Universe, 11th ed.(in the text))

Why are there no nearby (and thus "young") quasars?

The distant quasar ULAS J1120+0641 has a luminosity 6 × 1013 Le. Assuming it is at its Eddington limit, what is its mass (in solar masses)?

Which observational fact about quasars and their behavior is perhaps the most extraordinary?

All quasars appear to be:

A starlike object showing an almost featureless continuum spectrum would be a:

Active galaxies include each of the following EXCEPT:

The luminosity of the Milky Way Galaxy is about 3 × 1010 Le. Suppose all of this luminosity is due to a black hole and accretion disk at the center of the galaxy that is assumed to be at its Eddington limit. What would this suggest the mass is of this black hole (in solar masses)?

The spectrum of the quasar PKS 2000-330 contains the UV Lyman Lα line (λ0 = 121.6 nm), which has been shifted into the visible region of the spectrum by a redshift of z = 3.773. What is the shift, Δλ0, of this radiation in nanometers?

Seyfert galaxies were once considered to be a distinct class of galaxies because they:

The quasar PKS 1247+3406 has a redshift z = 4.897. What is its recession speed away from our galaxy?

The redshift of quasar 3C 273 is z = 0.158. What is the wavelength of the H γ\gammaγ line ( λ\lambdaλ 0 = 434 nm) in the spectrum of this quasar?

Astronomy and the Universe

Knowing the Heavens

Eclipses and the Motion of the Moon

Gravitation and the Waltz of the Planets

The Nature of Light

Optics and Telescopes

Comparative Planetology I: Our Solar System

Comparative Planetology II: the Origin of Our Solar System

The Living Earth

Our Barren Moon

Mercury, Venus, and Mars: Terrestrial, yet Unique

Jupiter and Saturn: Lords of the Planets

Jupiter and Saturns Satellites of Fire and Ice

Uranus, Neptune, Pluto, and the Kuiper Belt: Remote Worlds

Asteroids, Comets, and Impacts

Our Star, the Sun

The Nature of the Stars

The Birth of Stars

Stellar Evolution: on and After the Main Sequence

Stellar Evolution: The Death of Stars

Stellar Remnants: Neutron Stars and Black Holes

Our Galaxy

Galaxies

Cosmology: The Origin and Evolution of the Universe

Exploring the Early Universe

The Search for Extraterrestrial Life

Filters

The distant quasar ULAS J1120+0641 has a luminosity 6 × 10¹³ L_e. Assuming it is at its Eddington limit, what is its mass (in solar masses)?

The luminosity of the Milky Way Galaxy is about 3 × 10¹⁰ L_e. Suppose all of this luminosity is due to a black hole and accretion disk at the center of the galaxy that is assumed to be at its Eddington limit. What would this suggest the mass is of this black hole (in solar masses)?

The spectrum of the quasar PKS 2000-330 contains the UV Lyman L_α line (λ₀ = 121.6 nm), which has been shifted into the visible region of the spectrum by a redshift of z = 3.773. What is the shift, Δλ₀, of this radiation in nanometers?

The redshift of quasar 3C 273 is z = 0.158. What is the wavelength of the H $\gamma$ line ( $\lambda$ ₀ = 434 nm) in the spectrum of this quasar?