Supernovae: Sources of Cosmic Rays and New Star Formation
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Questions and Answers

Which of the following is NOT a characteristic of a supernova explosion?

  • The explosion is temporary and fades over several weeks or months
  • The peak optical luminosity can be comparable to that of an entire galaxy
  • The explosion is caused by a thermonuclear runaway in a white dwarf star (correct)
  • The progenitor object collapses to form a neutron star or black hole

    • What is the primary reason for the distinction between high redshift and low redshift supernova searches?

  • High redshift supernovae are more luminous and easier to detect
  • High redshift supernovae are more useful for generating Hubble diagrams, while low redshift supernovae are better for studying the physics of the events
  • The expansion of the universe means that more distant objects have a higher redshift, and thus can be used to estimate distances (correct)
  • Low redshift supernovae are more common and provide better spectroscopic data

    • What is the significance of the Pantheon data set for the study of supernovae?

  • It provides detailed observations of 1701 supernovae from 18 different surveys, allowing for more comprehensive analysis
  • It allows for the generation of Hubble diagrams and cosmological predictions using supernova light curves
  • It anchors the low-distance end of the Hubble curve, which is crucial for understanding galactic distances
  • All of the above (correct)

    • What is the primary purpose of using supernova light curves for high redshift observations?

    <p>To generate Hubble diagrams and make cosmological predictions</p> Signup and view all the answers

    Which of the following is the most accurate description of the origin of the term 'supernova'?

    <p>All of the above</p> Signup and view all the answers

    What is the primary mechanism that triggers most supernovae?

    <p>The sudden re-ignition of nuclear fusion in a white dwarf</p> Signup and view all the answers

    What is a major source of elements in the interstellar medium, ranging from oxygen to rubidium?

    <p>Supernovae</p> Signup and view all the answers

    What is the maximum speed at which supernovae can expel material?

    <p>A few percent of the speed of light</p> Signup and view all the answers

    What astronomical event was the last supernova directly observed in the Milky Way?

    <p>Kepler's Supernova in 1604</p> Signup and view all the answers

    What is the estimated frequency of supernovae occurring in the Milky Way?

    <p>Three times every century</p> Signup and view all the answers

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