who discovered the first pulsar? jocelyn bell pulsars spin fast due to what physics concept?

Who discovered the first pulsar?

Jocelyn Bell

Pulsars spin fast due to what physics

concept?

L = mvr v = L/(mr)

Conservation of Angular Momentum

Largest ~700Hz

Rapid Spin Rate

What is the average diameter of a pulsar?

Diameter = ~20km

How can pulsars help with nuclear physics?

Atomic Like Structures“atoms in the sky”

What does "PSC" stand for?

Pulsar Search Collaboratory

Which is correct for radio emission?

a) large wave length, high frequency, high energyb) small wave length, low frequency, low energyc) large wave length, low frequency, low energyd) small wave length, high frequency, low energy

c.) large wave length, low frequency, low energy

What does "DM" stand for?

Dispersion Measure

How high can pulsar space velocities be?

Over 1500 km/s

High Space Velocity

What household object can be compared to pulsars’ largest spin

rate?

Largest ~700Hz

Rapid Spin RateKitchen Blender

What is “noise”

Background radiation

What is the Dispersion Measure?

Dispersion Measure: A way measuring the number of electrons that a pulsar signal must pass through while traveling through space to the Earth. The units are parsecs per centimeter cubed. 

Don’t forget that direction matters!

DM = Distance*Electron Density

What were pulsars first thought to be?

“Little Green Men” Theory

ALIENS

What two reasons do pulsars have a strong magnetic

field?

Strong Magnetic Field

extremely powerful magnetic fields of 108-1011 Tesla

-frozen magnetic field from the original star- rapid spin rate

How fast in hertz can a pulsar approximately

spin?

Largest ~700Hz

Rapid Spin Rate

Why do pulsars have a high space velocity?

Over 1500 km/s

High Space Velocity

Their supernova explosion was not perfectly symmetrical

What type of electromagnetic radiations

do pulsars emit?

radio, optical,

x-ray, gamma ray

What is ?

How can pulsars help further validate

Einstein's Relativity Theories?

Potentially directly

detecting gravitational

waves

Are pulsars broad band or narrow band

frequency?

Broad bandfrequency

What university were pulsars first discovered

at?

High space velocity is the vector sum of which two

vectors?

Over 1500 km/s

High Space Velocity

How can pulsars assist with future space

exploration?

Interstellar GPS System

Which telescope is the PSC data retrieved

from?

The Green Bank Telescope: The world’s largest fully steerable object in the world.

Who are the three sponsors of the PSC?

What is "RFI"

Man-made Radio

Frequency Interference

What type of electromagnetic radiation

does the PSC observe pulsars in?

RADIO

What type of space velocity stars are pulsars?

a) runaway starsb) halo starsc) hypervelocity stars

Over 1500 km/s

High Space Velocity

Hypervelocity Stars

Where is the Green Bank Telescope located?

Green Bank, West Virginia

How strong can pulsars’ magnetic fields be?

Strong Magnetic Field

extremely powerful magnetic fields of 108-1011 Tesla

-frozen magnetic field from the original star- rapid spin rate

How many solar masses is the Chandrasekhar Mass Limit?

Chandrasekhar Mass Limit1.4 solar masses =2.78474 × 1030 kilograms

How can pulsars assist in timing experiments?

Very Precise Spin Rates

What two officer positions are available in the Penn State

PSC?

What can DM help to measure?

Dispersion Measure: A way measuring the number of electrons that a pulsar signal must pass through while traveling through space to the Earth. The units are parsecs per centimeter cubed. 

Don’t forget that direction matters!

DM = Distance*Electron Density

What year were pulsars discovered?

Jocelyn Bell

Name all five pulsar properties.

What do white dwarfs, neutron stars, and black holes all have

in common?

They are all at the end of a star’s life cycle.

What model is used to explain pulsars' pulse like signal?

Lighthouse Model

What university founded the PSC?

What are the three categories you can

categorize a PSC plot?

Pulsar

RFI

Noise

A pulsar is a super dense ______ star which emits dipole electromagnetic

radiation.

neutron