Exam 12: Predicting the Violent End of the Largest Stars

How were pulsars discovered?

A nova is a sudden brightening of a star that occurs when

How is high-mass star at the end of its life like an onion?

Which of the following descriptions does NOT represent a property of neutron stars?

If a star ended its main-sequence life with about 1.1 solar masses,the remnant would likely be a

A pulsar is most probably formed

How much energy is released in the supernova explosion of a massive star?

X-ray bursters are objects in the sky that emit sudden bursts of X-rays in addition to a steady,low-level,X-ray emission.These bursts of X-rays are believed to be caused by

Which force induces the core to condense and collapse in massive stars at the conclusion of each episode of nuclear fusion,such as the carbon,oxygen,and silicon fusion cycles?

If a star ended its main-sequence life with about 0.1 solar masses,the remnant would likely be a

All supernova remnants that have been observed are spherical in shape.

A black hole can be thought of as

After the core collapse and bounce in a supernova explosion,neutrinos pour out of the developing neutron star to propel the shock wave outward.

The existence of supermassive black holes in the centers of many galaxies has been inferred by what definitive measurement?

In reference to black holes,a singularity is

The core collapse phase at the end of the life of a massive star is triggered when

The event horizon of a nonrotating black hole is located at the

Jocelyn Bell,a young graduate student at Cambridge University in 1967,and her colleagues detected the first pulsar using an array of radio antennas.

Among the following locations in the universe,where would you expect to find a pulsar?

When a star with an initial mass greater than about 8 solar masses nears the end of its life,it becomes a red supergiant and its energy comes from a series of concentric fusing shells.