Rotating, Magnetized Neutron Star Charged particles are accelerated near a neutron star’s magnetic poles and produce two oppositely directed beams of radiation.
WHAT DO YOU THINK? Will the Sun someday stop shining? If so, how? What is a nova? Where do heavy elements on the Earth like carbon, silicon, oxygen, iron, and uranium come from? What are cosmic rays? What is a pulsar?
You will discover… what happens to stars when core helium fusion ceases how heavy elements are created the characteristics of the end of stellar evolution why some stars go out relatively gently, while others go with a bang the incredible densities of neutron stars and how they are observed
Crab Nebula and Pulsar Observations at different wavelengths give astronomers information about the nebula’s chemistry, motion, history, and interactions with preexisting gas and dust.
Crab Nebula and Pulsar The Crab’s visible flashes and X-ray pulses have identical periods of 0.033 seconds.
How Magnetic Field Strengths Increase As a star collapses, it carries the magnetic field inward, thereby increasing its strength.
Neutron Star’s Interior The neutron star has a superconducting, superfluid core 9.7 km in radius, surrounded by a 0.6-km-thick mantle of superfluid neutrons. The neutron star’s crust is only 0.3 km thick.
WHAT DID YOU THINK? Will the Sun someday cease to exist? If so, how? The Sun will shed matter as a planetary nebula in about 6 billion years and then cease nuclear fusion. Its remnant white dwarf will dim over the succeeding billions of years. What is a nova? A nova is a relatively gentle explosion of hydrogen gas on the surface of a white dwarf in a binary star system. What are the origins of the carbon, silicon, oxygen, iron, uranium, and other heavy elements on Earth? These elements are created during stellar evolution, by supernovae, and by colliding neutron stars. What are cosmic rays? Cosmic rays are high-speed particles (mostly hydrogen and other atomic nuclei) in space. Many of them are believed to have been created as a result of supernovae. What is a pulsar? A pulsar is a rotating neutron star in which the magnetic field’s axis does not coincide with the rotation axis. The beam of radiation it emits sweeps across our region of space.
Key Terms asymptotic giant branch (AGB) star Chandrasekhar limit cosmic ray cosmic ray shower glitch helium shell flash helium shell fusion lighthouse model neutron degeneracy pressure neutron star nova (plural novae) photodisintegration planetary nebula pulsar quark secondary cosmic ray supernova Type Ia supernova Type II supernova white dwarf X-ray burster