supernova_3

supernova_3 - of massive stars Beyond the neutron star...

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Mass transfer in close binaries Accretion onto a NS released tremendous energy. Those systems are called X-ray binaries Some emit 100,00 Lsun just in X-rays Hot enough to continually fuse H on surface, building up a layer of He X-ray bursts Quickly becomes hot enough fro helium fusion The sudden onset of fusion produces a burst of X-Rays Extreme gravity prevents any disruptive nova-like event Accretion resumes within a minute; systems burst every few minute to every few hrs. Neutron star limit Neutron degeneracy is pressure can not support gravity if mass exceeds abt 3 Msun This can be exceeded in both X-Ray binaries, and occasionally during the final collapse
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Unformatted text preview: of massive stars Beyond the neutron star limit Beyond this limit, no known force can resist the crush of gravity As far as we know, gravity crushes all the matter into a single point known as singularity It is not possible to see this, however the object has become a black hole- an object whose gravity is so powerful that not even light can escape it Black hole binaries The transition in X-Ray binaries isnt an explosive one. It will still have an X-Ray binary Hot accretion disk produces X-Rays They are not holes in the universe, but holes in the observable universe....
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supernova_3 - of massive stars Beyond the neutron star...

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