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Supernovae by Josh Klimek

Supernovae by Josh Klimek. Image of SN1994D from http://www.321space.com/gallery_page.html?gallery=stars&image=opo9919i. Historical Observation of Supernovae. Most Recent Supernovae 1054 the Crab Nebula 1572 observed by Tycho Brahe 1604 observed by Kepler 1987 .

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Supernovae by Josh Klimek

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  1. Supernovae by Josh Klimek Image of SN1994D from http://www.321space.com/gallery_page.html?gallery=stars&image=opo9919i

  2. Historical Observation of Supernovae • Most Recent Supernovae • 1054 the Crab Nebula • 1572 observed by Tycho Brahe • 1604 observed by Kepler • 1987 Image from http://members.aol.com/Artstellar/nova.JPG

  3. What is a Supernova? Star life cycle image from - http://www.star.ucl.ac.uk/groups/hotstar/images/life_cycle.jpg

  4. Why do supernovae occur? Two Types of Supernovae Type II Type Ia Table values from Universe 7e pg498 Chandrasekhar limit http://www.physast.uga.edu

  5. Further Differences Between the Two Types • Absorption spectrums • Luminosity Image from http://rst.gsfc.nasa.gov/Sect20/3_32.gif

  6. How Powerful is a Supernova? "The energy produced by a supernova is mind-boggling: 1044 joules. Is it the same as if each and every gram of the earth's mass was converted to a nuclear bomb 200 times more powerful than the one dropped on Hiroshima." - http://www.religioustolerance.org/ev_young3.htm • Earth’s mass = 6x1024 kg • 6x1024 kg = 6x1027 g • 200 x 6x1027 = 1.2x1030 Hiroshima bombs • “The power produced by a supernova is “100 times more energy than our sun has emitted in its 4.56 billion year history.” (Freedman pg 499) • “The rate at which it emitted energy in the form of neutrinos—was 10 times greater than the total luminosity in electromagnetic radiation in all of the star in the observable universe! (Freedman pg 503)

  7. SN2005A Data • Type Ia – Supernova in a Binary System • Amberstar A – M1 Ia, Red Supergiant 8.6 light years away from earth • Apparent magnitude m= -8.6 • Amberstar B – Hot White Dwarf known as a supersoft x-ray source (+500,000K) • White dwarf is not visible to the naked eye. • SN2005A occurred at 10:00 PM on 1.1.2005 • apparent magnitude m= -22 • Apparent Magnitude of the sun • m= -27.7 • Apparent magnitude of the Moon • m=-12.7 Image from http://archive.ncsa.uiuc.edu/Cyberia/NumRel/Images/massxfer.gif

  8. Observational Data on Sirius (Amberstar)

  9. How Bright Did it Get? • Apparent Magnitudes • Sun = -27.72 • Moon = -12.7 • Venus = -4.4 • Sirius = -1.5

  10. What would be the biological implication of a near earth supernova event? Is it possible to predict the occurrence of a supernova? What is Left Behind? Further Questions? Image from http://www.dcs.gla.ac.uk/~mc/images/Digital/Supernova.jpg

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