Dying Stars Part 1 Neutron Stars Supernovas make

Dying Stars Part 1 Neutron Stars

• Supernovas make some pretty “remanants” also. • The Crab Nebula was seen in 1054 CE • It has a Neutron Star in the center – in addition to blinking on and off – it also gives a radio sound. (Pulsar)

• Pulsars – When a large mass star ends its life in an explosion – a supernova – the core of the star goes on to form one of two things – a Black Hole (if the star’s mass was high) or a Neutron Star – if the mass was a bit lower. – The Neutron Star (and the Black Hole) will be spinning. IF the orientation of the spin axis, and magnetic fields – line up correctly – we can hear them in the Radio – they are Pulsars.

• The first Pulsar was discovered by Jocelyn Bell. • She was a Student when she found the Pulsar, so her professor got most of the Credit. Most people now give her the credit.

• Sounds of Pulsars – Rapidly Spinning Neutron Stars PSR B 0329 + 54 period=. 714519 sec. 1. 40 rotations/sec Vela – 10, 000 years old – 89 millisecond – 11 rotations/sec Crab – Supernova in 1054 AD - ~ 30 rotations/sec PSR J 0437 -4715 an old pulsar ~ 174 rotations/sec PSR B 1937+21 Fastest Known – Period=. 00155780644887275 sec ~642 rotations/sec the surface of the star is going about 1/7 the speed of light

Disclaimer Aloha I put together these power points for use in my science classes. You may use them in your classes. Some images are public domain, some are used under the fair-use provisions of the copyright law, some are mine. Copyright is retained by the owners! Ted Brattstrom