UNDERSTANDING THE UNIVERSE(LL)-W/CODE
3rd Edition
ISBN: 9780393869903
Author: PALEN
Publisher: NORTON
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Question
Chapter 13.3, Problem 13.3CYU
To determine
The reason for pulsing of a pulsar.
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Check out a sample textbook solutionStudents have asked these similar questions
Why don’t all supernova remnants contain pulsars?
a.
All supernova remnants do contain pulsars.
b.
Some supernova explosions form white dwarfs instead of the neutron stars necessary for pulsars.
c.
Pulsars slow down and quit producing the pulses before the supernova remnant dissipates.
d.
The pulsar may be tipped so that the beams do not sweep past Earth.
e.
b and c
Astronomers think of pulsars not as pulsing objects, but rather like a(n)
a.
Cepheid variable.
b.
eclipsing binary system.
c.
RR Lyrae variable.
d.
lighthouse with a beam that sweeps around the sky.
e.
car with beams coming out as it drives on a straight road.
Originally, the signals that were found to be pulsars were thought to be
a.
spinning neutron stars.
b.
spinning white dwarfs.
c.
spinning black holes.
d.
little green men.
Chapter 13 Solutions
UNDERSTANDING THE UNIVERSE(LL)-W/CODE
Ch. 13.1 - Prob. 13.1CYUCh. 13.2 - Prob. 13.2CYUCh. 13.3 - Prob. 13.3CYUCh. 13.4 - Prob. 13.4CYUCh. 13.5 - Prob. 13.5CYUCh. 13.6 - Prob. 13.6CYUCh. 13 - Prob. 1QAPCh. 13 - Prob. 2QAPCh. 13 - Prob. 3QAPCh. 13 - Prob. 4QAP
Ch. 13 - Prob. 5QAPCh. 13 - Prob. 6QAPCh. 13 - Prob. 7QAPCh. 13 - Prob. 8QAPCh. 13 - Prob. 9QAPCh. 13 - Prob. 10QAPCh. 13 - Prob. 11QAPCh. 13 - Prob. 12QAPCh. 13 - Prob. 13QAPCh. 13 - Prob. 14QAPCh. 13 - Prob. 15QAPCh. 13 - Prob. 16QAPCh. 13 - Prob. 17QAPCh. 13 - Prob. 18QAPCh. 13 - Prob. 19QAPCh. 13 - Prob. 20QAPCh. 13 - Prob. 21QAPCh. 13 - Prob. 22QAPCh. 13 - Prob. 23QAPCh. 13 - Prob. 24QAPCh. 13 - Prob. 26QAPCh. 13 - Prob. 27QAPCh. 13 - Prob. 28QAPCh. 13 - Prob. 29QAPCh. 13 - Prob. 30QAPCh. 13 - Prob. 31QAPCh. 13 - Prob. 32QAPCh. 13 - Prob. 33QAPCh. 13 - Prob. 35QAPCh. 13 - Prob. 36QAPCh. 13 - Prob. 37QAPCh. 13 - Prob. 38QAPCh. 13 - Prob. 39QAPCh. 13 - Prob. 40QAPCh. 13 - Prob. 41QAPCh. 13 - Prob. 43QAPCh. 13 - Prob. 44QAPCh. 13 - Prob. 45QAP
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- A neutron star can spin up to a. once a day. b. once an hour. c. once a minute. d. once a second. e. a hundred times a second.arrow_forwardThe white dwarf that remains when our Sun dies will be mostly made of A. helium. B. carbon. C. neutrons. D. hydrogen. Is the answer B? Thanks!arrow_forwardBlack hole candidates are conspicuous by their continuous or flickering emission of a. infrared light. b. ultraviolet light. c. gamma rays. d. X rays. e. all of the above.arrow_forward
- 2. 60 million years ago, an asteroid hit the Earth and killed every T-Rex on Earth. That same day, a star was born. 45 years ago, the singer of the band T Rex, Marc Bolan, wrapped himself around a tree at high speed. That same day, the star born 60 million years ago left the main sequence. Estimate the mass of that star, stating all assumptions you make.arrow_forwardAs 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.arrow_forwardAn isolated black hole in space would be difficult to detect because a. there would be no light source nearby. b. it would not be rotating rapidly. c. it would be stationary. d. very little matter would be falling into it. e. there would be very few stars behind it whose light it could block out.arrow_forward
- 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_forwardAs a star collapses, the conservation of angular momentum states that it will spin a. faster. b. slower. c. at the same rate. d. slower, then faster. e. faster, then slower.arrow_forwardWhat makes us think that the star system Cygnus X-1 contains a black hole? A, It emits X rays characteristic of an accretion disk, but the unseen star in the system is too massive to be a neutron star. B. No light is emitted from this star system, so it must contain a black hole. C. The fact that we see strong X-ray emission tells us that the system must contain a black hole. D.Cygnus X-1 is a powerful X-ray burster, so it must contain a black hole.arrow_forward
- In a spiral galaxy, the orbital speeds of stars far from the galaxy's center distance from the center increases. as the A. increase B. decrease C. are approximately the same D. The answer changes depending on the galaxy.arrow_forwardWhich of the following objects is considered to possibly contain a black hole? a. the central star of the Crab nebula b. the Orion nebula c. LMC X-3 d. Algol e. PSR 1257+12arrow_forwardThe section of the H–R diagram where the Cepheid variables reside is the a. birth line. b. zero-age main sequence. c. instability strip. d. horizontal branch. e. white dwarf region.arrow_forward
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