Universe: Stars And Galaxies
6th Edition
ISBN: 9781319115098
Author: Roger Freedman, Robert Geller, William J. Kaufmann
Publisher: W. H. Freeman
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Chapter 20, Problem 34Q
To determine
Similarities and differences between a nova and a Type 1a supernova.
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A Type Ia Supernova is an example of a:
What is the difference between type I and type II supernovae?
Comment on the difference between a nova and supernova. [Note: There are two basic types of supernova.]
Chapter 20 Solutions
Universe: Stars And Galaxies
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- How is a nova different from a type Ia supernova? How does it differ from a type II supernova?arrow_forwardHow would the spectra of a type II supernova be different from a type Ia supernova? Hint: Consider the characteristics of the objects that are their source.arrow_forwardHow do the two types of supernovae discussed in this chapter differ? What kind of star gives rise to each type?arrow_forward
- What observations from SN 1987A helped confirm theories about supernovae?arrow_forwardA supernova can eject material at a velocity of 10,000 km/s. How long would it take a supernova remnant to expand to a radius of 1 AU? How long would it take to expand to a radius of 1 light-years? Assume that the expansion velocity remains constant and use the relationship: expansiontime=distanceexpansionvelocity .arrow_forwardWhat is the difference between the spectra of type I supernovae and those of type II supernovae?arrow_forward
- What does mass exchange have to do with the occurrence of a type la supernova?arrow_forwardIndicate whether the following are properties of Type Ia or Type II supernovae. (Select 1-Type Ia, 2-Type II. If the first is 1 and the rest 2, enter 12222222). A) Produces very heavy elements like Uranium during the explosion. B) Can occur in a very old star cluster. C) Supernovae of this type have the same peak luminosity. D) Could completely explode and leave no remnant behind. E) Can only occur in a binary system. F) The spectrum shows very little Hydrogen. G) Caused by a white dwarf exceeding the Chandrasekhar mass limit.arrow_forwardInternational Astronomical Union reported on 24 Feb 1987: An object was discovered on Feb. 24.37 UT (position R.A. = 5h35m.8, Decl. = -69 18'), obtained m = 4.8 on Feb. 24.454 UT. This object proved to be the most famous supernova (SN) in the 20th Century and the brightest visible from Earth since 1604. It is classified as a SN of the type Il in the Large Magellanic Cloud (SN1987A). Its brightness peaked in May 1987, with an apparent magnitude of m = 2.8. a) Find the absolute magnitude M of the SN1987A at maximum. Distance of the LMC is 51,400 pc. b) The progenitor (before SN explosion) star was a blue supergiant of the apparent magnitude m = 12.8. How much brighter (in terms of flux density) this SN was at maximum compared to the progenitor star. Find the ratio FSN / Ebeforearrow_forward
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