astrophysics i, lecture slides – chapter 5, eth zurich...slides5_v1_astrophysics_1_hs2019 author...

Nuclear binding energy

(from Choudhuri)

Astrophysics I, Lecture Slides – Chapter 5, ETH Zurich

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Nuclear reactionrates

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Table of nuclides - type of decay

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Table of nuclides – nuclei lifetime

http://www.nndc.bnl.gov/chart4

Nuclear reaction, pp-chain and CNO cycle

Figure from http://www.ims.uaf.edu/isotopes/class-images/isotope-table.jpg5

Hydrogen burning: pp-chain vs CNO-cycle

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Solar neutrino flux

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Stellar evolution in the HR-diagram

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Evolution of a 1 MS-star- HHe burning (main seq.), 9·109y,- evolution towards red giants- He-burning, 109J,- Extended red giatns with

pulsations and heavy mass loss - hot nucleous with planetary nebula- white dwarf, cooling >> 109 y.

Evolution of a 15 MS-star- HHe burning (main seq.), 2·107y- Evolution towards red giant and

strong mass loss,- He, C, O, Si burning, 106 y,- formation of Fe-core,- Core-collapse and supernova-

explosion (for stars with M > 8 MS).

HeC,O

HeC,O

O,SiFeSN

red giants

hotsubdwarfs

whitedwarfs

4.0

4.0

2.0

0.0

4.5 3.5Log T

1Ms

15Ms

Log

L/L S

Stellar modelcalculations

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Planetary nebulae with central star

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Supernova remnant (Crab nebula)

11HST image, NASA/ESA

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Supernova 1987ASN 1987A in the Large Magellanic Cloud (50 kpc), before and after…

Bolometric light curve of SN 1987A

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Short gamma ray burstGW170817

neutron star merger

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