The jets created when a black hole was formed at the center of a progenitor star, were able to escape easily into space. This is indicated by the lack of Hydrogen and Helium lines in a Type Ic supernova.

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Chapter 21, Problem 53Q

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To explain:

The jets created when a black hole was formed at the center of a progenitor star, were able to escape easily into space. This is indicated by the lack of Hydrogen and Helium lines in a Type Ic supernova.

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An AGN is emitting with a luminosity of 2×1040W. The AGN's brightness varies by 10% on a time scale of 20 hours. Assuming that the size of the emitting region of the AGN is three Schwarzschild radii, choose which of the following values could give the mass of the central Black Hole, in solar masses.

Assume that the mass of the core of a star that just went Supernova type II is $2.5 \mathrm{M}_{\odot}$ before and after the collapse, while the Radius changes from $10^3 \mathrm{~km}$, before the collapse, to 12 km , after the collapse respectively.(a) What is the change in potential energy of the core between the two stages before and after the collapse?(b) Knowing that the luminosity of the Sun is $4 \times 10^{26} \mathrm{~W}$ how many years would it take the Sun to release the same amount of energy?

A main sequence star of mass 25 M⊙has a luminosity of approximately 80,000 L⊙. a. At what rate DOES MASS VANISH as H is fused to He in the star’s core? Note: When we say “mass vanish '' what we really mean is “gets converted into energy and leaves the star as light”. Note: approximate answer: 3.55 E14 kg/s b. At what rate is H converted into He? To do this you need to take into account that for every kg of hydrogen burned, only 0.7% gets converted into energy while the rest turns into helium. Approximate answer = 5E16 kg/s c. Assuming that only the 10% of the star’s mass in the central regions will get hot enough for fusion, calculate the main sequence lifetime of the star. Put your answer in years, and compare it to the lifetime of the Sun. It should be much, much shorter. Approximate answer: 30 million years.

Answer 2

Question

Chapter 21, Problem 53Q

To determine

To explain:

The jets created when a black hole was formed at the center of a progenitor star, were able to escape easily into space. This is indicated by the lack of Hydrogen and Helium lines in a Type Ic supernova.

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Answer 3

Question

Chapter 21, Problem 53Q

To determine

To explain:

The jets created when a black hole was formed at the center of a progenitor star, were able to escape easily into space. This is indicated by the lack of Hydrogen and Helium lines in a Type Ic supernova.

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Answer 4

Question

Chapter 21, Problem 53Q

To determine

To explain:

The jets created when a black hole was formed at the center of a progenitor star, were able to escape easily into space. This is indicated by the lack of Hydrogen and Helium lines in a Type Ic supernova.

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Answer 5

Chapter 21, Problem 53Q

To determine

To explain:

The jets created when a black hole was formed at the center of a progenitor star, were able to escape easily into space. This is indicated by the lack of Hydrogen and Helium lines in a Type Ic supernova.

Answer 6

Chapter 21, Problem 53Q

To determine

To explain:

The jets created when a black hole was formed at the center of a progenitor star, were able to escape easily into space. This is indicated by the lack of Hydrogen and Helium lines in a Type Ic supernova.

Answer 7

Chapter 21, Problem 53Q

To determine

To explain:

The jets created when a black hole was formed at the center of a progenitor star, were able to escape easily into space. This is indicated by the lack of Hydrogen and Helium lines in a Type Ic supernova.

Answer 8

Expert Solution & Answer

Answer 9

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Answer 11

Ch. 21 - Prob. 1Q Ch. 21 - Prob. 2Q Ch. 21 - Prob. 3Q Ch. 21 - Prob. 4Q Ch. 21 - Prob. 5Q Ch. 21 - Prob. 6Q Ch. 21 - Prob. 7Q Ch. 21 - Prob. 8Q Ch. 21 - Prob. 9Q Ch. 21 - Prob. 10Q

The jets created when a black hole was formed at the center of a progenitor star, were able to escape easily into space. This is indicated by the lack of Hydrogen and Helium lines in a Type Ic supernova.

Concept explainers

To explain:

The jets created when a black hole was formed at the center of a progenitor star, were able to escape easily into space. This is indicated by the lack of Hydrogen and Helium lines in a Type Ic supernova.

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Chapter 21 Solutions

The jets created when a black hole was formed at the center of a progenitor star, were able to escape easily into space. This is indicated by the lack of Hydrogen and Helium lines in a Type Ic supernova.

Concept explainers

To explain: The jets created when a black hole was formed at the center of a progenitor star, were able to escape easily into space. This is indicated by the lack of Hydrogen and Helium lines in a Type Ic supernova.

Want to see the full answer?

Chapter 21 Solutions

To explain:

The jets created when a black hole was formed at the center of a progenitor star, were able to escape easily into space. This is indicated by the lack of Hydrogen and Helium lines in a Type Ic supernova.