Transcript Neutron

Neutron-Stars
By Kraml E.
09.01.2017
(not actually)
A Neutron-Star
The Sun
Source: NASA
A Neutron-Star
Comparison
Diameter: 1.4 x 10^6 km
Diameter: 10 - 20 km
Mass:
2 x 10^30 kg
Mass:
4 x 10^30 kg (2x Ms)
Density:
1410 kg/m³
Density:
6 x 10^17 kg/m³
(4 x 10^14x Density of Sun)
Formation
Main sequence star > 8 Ms
Nuclear processes lead to iron core
Shell-burning mass deposits causes core to exeed
Chandrasekhar-limit
Increased temperature > 5 x 10^9 K leads
to photodisintegration
Electrons and Protons combine to Neutrons
-> Releasing Neutrinos
Neutron degeneracy pressure stops contraction,
Neutrinos are flung outward creating a supernova
By Richard Powell
Formation alternatives
Starting mass < 0.5 Ms -> Cannot start Helium-burning
Starting mass < 8 Ms -> White Dwarf
Starting mass between 8 – 12 Ms -> Neutron star with 1.25 Ms
Remnant mass > 3-5 Ms -> Black hole
Maximum observed mass of neutron stars is 2.01 Ms
Gravity
by Corwin Zahn
Magnetic field
On Earth:
Medical MRI:
HighRes MRI:
Levitating Frog:
Laboratory, continous:
Laboratory, pulse(non-destructive):
Laboratroy , pulse:
1.5 – 3 T
7 – 9.4 T
16 T
45 T
100T
10^3 T
Neutron Star:
10^4 – 10^11 T
Magnetar:
10^8 – 10^11 T
Radiation
Non-pulsating neutron star
Pulsars (pulsating radio star)
Radio-quiet neutron star
Source: Wikipedia