because they are super dense
The reasons behind the magnetic field of a neutron star are not clear. Neutron stars are the collapsed core of star of 10 to 30 solar masses. One theory is that the magnetic field of a neutron star is because of the conservation of magnetic flux. If a star had a magnetic flux over its surface and the star then collapsed to a much smaller neutron star but the flux was conserved, then the same flux for the neutron star would be spread over a much smaller area making the magnetic field much stronger. But this explanation goes only partway towards explaining the neutron stars' magnetic field.
You an expect any planet or moon to have magnetic fields. Some more, some less.
You might, but that would be wrong! Mercury has a strong magnetic field.
A beta particle is deflected by a magnetic field. Perhaps you are thinking of the neutron or the gamma ray?
A pulsar
The reasons behind the magnetic field of a neutron star are not clear. Neutron stars are the collapsed core of star of 10 to 30 solar masses. One theory is that the magnetic field of a neutron star is because of the conservation of magnetic flux. If a star had a magnetic flux over its surface and the star then collapsed to a much smaller neutron star but the flux was conserved, then the same flux for the neutron star would be spread over a much smaller area making the magnetic field much stronger. But this explanation goes only partway towards explaining the neutron stars' magnetic field.
Since a neutron has no charge, it would not be deflected by a magnetic field.
a powerful magnetic field
A neutron star contains a powerful magnetic field and spins very rapidly. the spinning magnetic field generates a tremendously powerful electric field, and the filed causes the production of electron positron pairs. As the charged particles are accelerated through the magnetic field, they emit photons in the direction of their motion, which produce powerful beams of electromagnetic radiation emerging from the magnetic poles. Pretty much when you look at it from far away it looks like it blinking at you so that's why they call it the light house model in the same way when your at sea and you see a blinking light in the distance which is a lighthouse. =)
As far as I know, in a magnetar, which is a special type of neutron star.
sunspots are caused by the magnetic fields
A pulsar is a rapidly spinning neutron star that releases regular pulses of electromagnetic radiation from its magnetic field
as magnetic moments are created by the movement of electric charges Since the neutron is a neutral particle the magnetic moment is an indication of substructure i.e. the neutron is made of other electrically charged particles (quarks).There is a cloud of pi-mesons around the neutrons in result to the exchange of pi-mesons (the exchange particle of the strong force) with the other nucleons (proton and neutrons).the non-zero magnetic moment of the neutron indicates that it is not an elementary particle as it carries no net charge but still interacts with a magnetic field.The magnetic moment is negative which means that the neutron has a tendency to align anti parallel to a magnetic field rather than parallel to the field.
as magnetic moments are created by the movement of electric charges Since the neutron is a neutral particle the magnetic moment is an indication of substructure i.e. the neutron is made of other electrically charged particles (quarks).There is a cloud of pi-mesons around the neutrons in result to the exchange of pi-mesons (the exchange particle of the strong force) with the other nucleons (proton and neutrons).the non-zero magnetic moment of the neutron indicates that it is not an elementary particle as it carries no net charge but still interacts with a magnetic field.The magnetic moment is negative which means that the neutron has a tendency to align anti parallel to a magnetic field rather than parallel to the field.
You might, but that would be wrong! Mercury has a strong magnetic field.
You an expect any planet or moon to have magnetic fields. Some more, some less.
A beta particle is deflected by a magnetic field. Perhaps you are thinking of the neutron or the gamma ray?