21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Question
Chapter 16.5, Problem 16.5CYU
To determine
The time at which the white dwarf will become a supernova.
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When a mass is transferred through the inner Lagrangian point in a binary system toward a white dwarf, the material forms a rapidly growing whirlpool of material known as a(n)
a.
accretion disk.
b.
Lagrangian point.
c.
Algol paradox.
d.
planetary nebula.
e.
supernova remnant.
As a white dwarf cools, its radius will not change because
a.
pressure resulting from nuclear reactions in a shell just below the surface keeps it from collapsing.
b.
pressure does not depend on temperature for a white dwarf because the electrons are degenerate.
c.
pressure does not depend on temperature because the white dwarf is too hot.
d.
pressure does not depend on temperature because the star has exhausted all its nuclear fuels.
e.
material accreting onto it from a companion maintains a constant radius.
The diagram below shows an H-R diagram with life track of a 1-solar-mass star, with various stages labeled A through E.
Temperature
What will happen to the star after stage E?
A. It will gain mass until it collapses under its own weight.
B. It will begin burning carbon in its core.
C. It will explode in a supernova.
D. It will collapse to make a neutron star.
E. It will eject a planetary nebula.
Luminosity →
Chapter 16 Solutions
21st Century Astronomy
Ch. 16.1 - Prob. 16.1CYUCh. 16.3 - Prob. 16.3CYUCh. 16.4 - Prob. 16.4CYUCh. 16.5 - Prob. 16.5CYUCh. 16 - Prob. 1QPCh. 16 - Prob. 2QPCh. 16 - Prob. 3QPCh. 16 - Prob. 4QPCh. 16 - Prob. 5QPCh. 16 - Prob. 6QP
Ch. 16 - Prob. 8QPCh. 16 - Prob. 9QPCh. 16 - Prob. 10QPCh. 16 - Prob. 11QPCh. 16 - Prob. 12QPCh. 16 - Prob. 13QPCh. 16 - Prob. 14QPCh. 16 - Prob. 15QPCh. 16 - Prob. 16QPCh. 16 - Prob. 17QPCh. 16 - Prob. 18QPCh. 16 - Prob. 19QPCh. 16 - Prob. 20QPCh. 16 - Prob. 21QPCh. 16 - Prob. 23QPCh. 16 - Prob. 24QPCh. 16 - Prob. 25QPCh. 16 - Prob. 26QPCh. 16 - Prob. 27QPCh. 16 - Prob. 28QPCh. 16 - Prob. 29QPCh. 16 - Prob. 30QPCh. 16 - Prob. 31QPCh. 16 - Prob. 32QPCh. 16 - Prob. 33QPCh. 16 - Prob. 34QPCh. 16 - Prob. 35QPCh. 16 - Prob. 36QPCh. 16 - Prob. 37QPCh. 16 - Prob. 38QPCh. 16 - Prob. 39QPCh. 16 - Prob. 40QPCh. 16 - Prob. 41QPCh. 16 - Prob. 42QPCh. 16 - Prob. 43QPCh. 16 - Prob. 44QPCh. 16 - Prob. 45QP
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- Hypernovae are thought to be a. a star greater than 20 solar masses collapsing into a black hole. b. binary systems involving mass transferred to a neutron star. c. binary systems involving mass transferred to a white dwarf. d. two main-sequence stars colliding. e. binary systems involving mass transferred to a black hole.arrow_forwardWhich of the following statements about novae is not true? A. A nova involves fusion taking place on the surface of a white dwarf. B. A star system that undergoes a nova may have another nova sometime in the future. C. Our Sun will probably undergo at least one nova when it becomes a white dwarf about 5 billion years from now. D. When a star system undergoes a nova, it brightens considerably, but not as much as a star system undergoing a supernova. Is the answer C? Since the sun has no companion star, it cannot gain accreted matter to initiate a nova and so it would not undergo a nova, it would just undergo a type I supernova? Thanks!arrow_forwardWhich of the following binary star systems cannot exist? A. A 1 solar-mass main sequence star and a 4 solar mass red giant with a size 100 times smaller than the orbital distance. B. A 15 solar-mass main sequence star and a 10 solar mass red giant with a size 100 times smaller than the orbital distance. C. A 1 solar-mass main sequence star and a 4 solar-mass main sequence star. D. A 2 solar-mass main sequence star and a 1 solar mass red giant with a size a few times smaller than the orbital distance.arrow_forward
- A Type Ia Supernova is an example of a: a. Parallax object b. Moving cluster object c. Standard ruler object d. Standard candle objectarrow_forwardIf a star is to eventually form a stellar black hole at any point in its life cycle what must happen? A. Gravity must be strong enough to compress all its material to be smaller than its schwartzchild radius B. it must pass by a supermassive black hole and tidal forces will do the rest C. Gravity must expand it so it can over power the nuclear forces that compress it and keep it from exploding by giving off all its heat D. A star will always have the same mass and radius and the only black holes that exist are ones that have existed shortly after the big bangarrow_forward24 If the Temperature of the core of a supernova is 3200 x 1023 K, what should be the average translational kinetic energy of the particles moving inside this supernov (Boltzmann's constant = 1.38 x 10-23 J/K) Type your answer...arrow_forward
- Pulsars CANNOT be spinning white dwarfs because a. white dwarfs are not that common. b. white dwarfs are not dense enough. c. white dwarfs do not have magnetic fields. d. a white dwarf spinning that fast would fly apart. e. all of the above are true.arrow_forwardObjects in binary systems consist of a neutron star accumulating material from another star on its surface, where it ignites and produces periodic a. type II supernovae. b. X-ray bursters. c. novae. d. helium flashes.arrow_forwardA (relatively) nearby K-type star known as Nu? Canis Majoris has an estimated orbital radius of 2.3344 x 10° km, and an estimated orbital period of 736.9 days. a. What is the mass of Nu? Canis Majoris? b. What is the mass of Nu² Canis Majoris in terms of solar masses?arrow_forward
- Which of the following is wrong? A. Tidal effects in a binary star system become more important when one or both stars become giant stars. B. There is no fusion occurring in the core of a low-mass red giant star. C. Gold (the element) is produced during the supernova explosions of high-mass stars. D. Suppose the star Betelgeuse were to become a supernova tomorrow, we'd see by naked eyes a cloud of gas expanding away from the position where Betelgeuse used to be. Over a period of a few weeks, this cloud would fill a large part of our sky.arrow_forwardFor a white dwarf to become a nova it is necessary for it to A. become a black hole. B. have begun life as a high-mass star. C. have a binary companion. D.rejoin the main sequence.arrow_forwardWhich of the following nuclear fuels does a one-solar-mass star use over the course of its entire evolution? a. hydrogen b. hydrogen and helium c. hydrogen, helium, and carbon d. hydrogen, helium, carbon, and neon e. hydrogen, helium, carbon, neon, and oxygenarrow_forward
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