neutron star

Neutron star

Students will be able to :

• define what a neutron star is and how it form

• describe a unique characteristic of a neutron star

What's a neutron star?

How does it form?

• Remains dead stars that are 4-8 times the mass the Sun.

• Very dense and mostly made up of neutrons

• Very strong gravitational pull

• Strong magnetic fields

• emits radiation; pulsar

• about 20 km in diameter

Neutron star fast facts

How does a neutron star form

• When massive stars burst in a supernova, neutron stars are created.

• The gravity is compressing the star while nuclear fusion inside the star is pushing the outward so its balance

• But then the gravity suddenly got stronger then overwhelm the internal pressure

• Shock waves travel through the star which cause the star to blow up

• The gravity is so strong it compress proton and electron together which creates neutron

Multiple Choice

What is the main process on how neutron stars form?

• Supernova explosion

• Stellar accretion

• Binary star collision

• Nuclear fission

Properties of a

neutron star

Gravity

• VERY VERY STRONG gravitational pull

• About 200000000000 times stronger than Earth

• Very strong pull due to their unbelievable mass

• Very dense because the gravity squashes the atoms together.

• To escape the pull an object must speed-up to half the speed of light

Multiple Choice

Which statement best describe a neutron star gravitational pull

• same as Earth

• A bit stronger than Earth

• A lot Stronger than Earth

• weaker than Earth

Radiation

• Produce radiation called pulsars

• Neutron stars that produce a lot of pulsars is called a pulsar neutron star

• A rapidly spinning neutron star

• Caused by particle moving very fast

• Can rotate up to 100 times PER SECOND

• A pulsar rotation cause the radiation beams to spread through the universe, that's how we can detect a neutron star

Multiple Choice

How do pulsars emit radiation?

• Through nuclear fusion

• Through chemical reactions

• Through beams of radiation from the rotation of a neutron star

Magnetic fields

• One of the strongest in the universe

• trillions of time stronger than Earth's

• Neutron stars with very strong magnetic fields are called magnetars

• Have strong magnetic fields because of powerful electric currents

• Dipolar structure, similar to Earth's

• Magnetic fields can fade over time

Multiple Choice

What is the primary shape of a neutron star's magnetic field?

• square

• Dipolar

• triangle

• cylinder

Density

• Very high density

• a single teaspoon can weigh up to billion of tons; 10^17 to 10^18 kilos per cubic meter

• Very dense because tightly pack neutrons

• One of the densest things in the universe, surpassed only by black holes

Multiple Choice

Average density of a neutron star in kilograms per cubic meter

• 10^17 to 10^18

• 10^19 to 10^21

• 10^7 to 10^8

• 10^11 to 10^13

Temperature

• very high temperature

• the temperature of its surface can be up to 1 million kelvin

• the core can be up billions of kelvin

• very hot because a lot of energy is released

• cool over time, the older the star the cooler

Multiple Choice

How does the temperature of a neutron star change over time?

• It remains constant throughout its lifespan

• It gradually increases as the star ages

• It cools down over time

• It fluctuates unpredictably due to stellar activity

POWER QUIZ TIME!!!!!

Multiple Choice

What is the approximate size of a typical neutron star?

• Similar to Earth's size.

• Enormous, several times larger than the Sun.

• Comparable to the size of our Sun.

• About the size of a city.

Multiple Choice

What are neutron star that have extremely high magnetic fields call?

• magnet star

• magnetars

• magnet neutron

• neutron magnetars

Multiple Choice

Which physical property of neutron stars is responsible for their incredibly strong gravitational pull?

• Their extremely high mass

• Their fast rotational speed.

• The presence of a strong magnetic field.

• The presence of a strong magnetic field.

Multiple Choice

what is a pulsar

• A type of supernova explosion.

• A binary star system containing a neutron star.

• A neutron star emitting regular beams of radiation.

• A spacecraft designed to study neutron stars.