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... 2a. Mark and label the Sun (spectral type=G2V, MV = 4.83, B-‐V=+0.66) and the star Vega (spectral type: A0V, MV = 0.5, B-‐V=0.0) in the HR diagram. [Assume the tick marks on the lower horizontal ...
... 2a. Mark and label the Sun (spectral type=G2V, MV = 4.83, B-‐V=+0.66) and the star Vega (spectral type: A0V, MV = 0.5, B-‐V=0.0) in the HR diagram. [Assume the tick marks on the lower horizontal ...
Supernovae: Heavy Elements
... • Because iron requires energy to be fused into heavier elements fusion is no longer possible and the core begins to heat and contract one final time • This final, catastrophic collapse happens at incredible speeds • Freaky, incredible speeds* *Freaky, incredible speeds are approximately ¼ the speed ...
... • Because iron requires energy to be fused into heavier elements fusion is no longer possible and the core begins to heat and contract one final time • This final, catastrophic collapse happens at incredible speeds • Freaky, incredible speeds* *Freaky, incredible speeds are approximately ¼ the speed ...
Document
... extract around 10% of the source’s rest mass energy (same efficiency would give longer lifetime for a less luminous source) Is this realistic? Energy source believed to be gravitational infall (accretion) of matter onto a neutron star from a binary companion. Energy yield / unit mass ...
... extract around 10% of the source’s rest mass energy (same efficiency would give longer lifetime for a less luminous source) Is this realistic? Energy source believed to be gravitational infall (accretion) of matter onto a neutron star from a binary companion. Energy yield / unit mass ...
Supernovas 10/19
... unbound “free” electrons for every Fe • electrons are “degenerate” as so close together. This causes them to provide most of the pressure resisting gravity • enormous stress. If electrons “give way” leaves “hole” in center of star PHYS 162 ...
... unbound “free” electrons for every Fe • electrons are “degenerate” as so close together. This causes them to provide most of the pressure resisting gravity • enormous stress. If electrons “give way” leaves “hole” in center of star PHYS 162 ...
What is a Star
... 1.000.000 times greater than the Sun. The core of a red supergiant can reach the temperature (billions of degrees) at which all the atoms with atomic number bigger then Carbon (Z=6) but not bigger then Iron (Z=26) can be produced by nuclear fusion reactions. White dwarf White dwarfs are shrunken rem ...
... 1.000.000 times greater than the Sun. The core of a red supergiant can reach the temperature (billions of degrees) at which all the atoms with atomic number bigger then Carbon (Z=6) but not bigger then Iron (Z=26) can be produced by nuclear fusion reactions. White dwarf White dwarfs are shrunken rem ...
Lecture 15 (pdf from the powerpoint)
... rapidly expanding shell of heavy elements that were created in the explosion. • Gold, uranium and other heavies all originated in a supernova explosion! ...
... rapidly expanding shell of heavy elements that were created in the explosion. • Gold, uranium and other heavies all originated in a supernova explosion! ...
What Are We Made Of? - University of Louisville
... universe are gravitational, electromagnetic and nuclear. The interaction of these three forces determines the structure of matter. • The nuclear force overpowers the opposing electromagnetic force of protons in the nucleus. • The electrons (-) orbit the nucleus (+), being pulled by the electromagnet ...
... universe are gravitational, electromagnetic and nuclear. The interaction of these three forces determines the structure of matter. • The nuclear force overpowers the opposing electromagnetic force of protons in the nucleus. • The electrons (-) orbit the nucleus (+), being pulled by the electromagnet ...
Review problem
... forces are equal). Calculate the difference in binding energy for the two mirror isobars 158 O and 157 N . The electric repulsion among eight protons rather than seven accounts for the difference. ...
... forces are equal). Calculate the difference in binding energy for the two mirror isobars 158 O and 157 N . The electric repulsion among eight protons rather than seven accounts for the difference. ...
Document
... • Gravitational tides pull matter off big low density objects towards small high density objects. ...
... • Gravitational tides pull matter off big low density objects towards small high density objects. ...
Name - CLC Charter School
... helium, but do have a silicon line in their spectrum. They are thought to be formed in some binary star systems and are created by the explosion of a carbon oxygen white dwarf. The type Ia supernova is caused when the density of the white dwarf reaches II x I09 g/cm and the dwarf collapses into a ne ...
... helium, but do have a silicon line in their spectrum. They are thought to be formed in some binary star systems and are created by the explosion of a carbon oxygen white dwarf. The type Ia supernova is caused when the density of the white dwarf reaches II x I09 g/cm and the dwarf collapses into a ne ...
Section 3-3(rev04) 2
... • All stars eventually start to run out of hydrogen fuel and become red giants or supergiants, depending on how large they are. • When fuel runs out, it becomes a white dwarf, neutron star, or black hole. • Small and medium stars become red giants and then white dwarfs. These are the size of the Ear ...
... • All stars eventually start to run out of hydrogen fuel and become red giants or supergiants, depending on how large they are. • When fuel runs out, it becomes a white dwarf, neutron star, or black hole. • Small and medium stars become red giants and then white dwarfs. These are the size of the Ear ...
nuclear fusion
... This led to the formation of H nuclei. • The H nuclei were pulled together by gravity into masses that would become the stars. The H nuclei fused into He nuclei, releasing enough energy that the star began to shine. • The fusion process continued for billions of years, releasing energy as heavier an ...
... This led to the formation of H nuclei. • The H nuclei were pulled together by gravity into masses that would become the stars. The H nuclei fused into He nuclei, releasing enough energy that the star began to shine. • The fusion process continued for billions of years, releasing energy as heavier an ...
P-nuclei
p-Nuclei (p stands for proton-rich) are certain proton-rich, naturally occurring isotopes of some elements between selenium and mercury which cannot be produced in either s- or r-process.