Neutron Stars( Neutrons, Pulsars, Magnetars) 2018

What is a Neutron star?

• a star

• a celestial object of very small radius (typically 18 miles/30 km and very high density, composed predominantly of closely packed neutrons. Neutron stars are thought to form by the gravitational collapse of the remnant of a massive star after a supernova explosion, provided that the star is insufficiently massive to produce a black hole.

• a core of a star

What is a pulsar?

• a car

• a star

• a highly magnetized rotating neutron star that emits a beam of electromagnetic radiation. This radiation can be observed only when the beam of emission is pointing toward Earth, and is responsible for the pulsed appearance of emission.

Tags

NGSS.HS-PS4-3

What is a magnetar?

• is a type of neutron star believed to have an extremely powerful magnetic field. The magnetic field decay powers the emission of high-energy electromagnetic radiation, particularly X-rays and gamma rays.

• a star

• the remnant of a star

• a quantum theory

What mass does a star have to be to become a neutron?

• a mass between 8 and 10 times that of the sun.

• 18 solar masses

• 2 solar masses

• 1 solar mass

• over 9000

How does a neutron star become a pulsar?

• pulsars become neutrons

• spinning really fast

• by dancing

• eating stars (or by eating children in there sleep)

Can neutron stars become black holes?

• YES

• NO NEVER!

Neutron star mergers occur in a fashion similar to the rare brand of type Ia supernovae resulting from merging white dwarfs. ... When they meet, their merger leads to the formation of either a heavier neutron star or a black hole, depending on whether the mass of the remnant exceeds the Tolman–Oppenheimer–Volkoff limit.

• True

• False

The first evidence of an exoplanet was noted as early as 1917, but was not recognized as such. However, the first scientific detection of an exoplanet began in 1988. Shortly afterwards, the first confirmed detection came in 1992, with the discovery of several terrestrial-mass planets orbiting the pulsar PSR B1257+12(The Lich Pulsar).

• True

• False

Which is the closest pulsar to us?

• PSR J0108-1431 (J0108 for short)

• Crab Pulsar

• Lich Pulsar

• Vela Pulsar

• Black Widow Pulsar

What is the closest magnetar to us?

• SGR 1900+14

• AXP 1E 1048-59

• SGR 1806-20

• SGR 1900+14

• CXOU J164710.2-455216