Exam 13: To the Graveyard of Stars: the End Points of Stellar Evolution

An astronomer observes two Type Ia supernovas in different galaxies.The first is in a galaxy 100 Mpc away.If the second supernova is 10⁶ times fainter than the first but has an identical light curve,how far away is the second supernova's host galaxy?

A massive star collapses and its core forms a neutron star.What two properties of the core must be amplified during collapse in order to produce a pulsar?

Why does a red giant grow in radius?

What causes a planetary nebula?

Uranium in the Universe is produced in:

A neutron star has a radius of 10 km and twice the mass of the Sun.How does the gravitational acceleration of a ball on the surface of a neutron star compare to that on the surface of the Sun? (The Sun has a radius of about 700,000 km.)

What explodes in Type Ia and Type II supernovas?

During part of its time as a red giant,a star remains at roughly the same temperature but increases in luminosity by a factor of 1,000.By what factor does its radius increase?

In which wavelength regime are the periodic signals from pulsars typically seen?

Which of the following would increase the electron degeneracy pressure inside an object?

An X-ray burster is most analogous to a(n):

The Sun will end its life as a:

Suppose that a white dwarf accretes mass.How does its radius change?

At which evolutionary stage do intermediate mass stars lose most of their outer layers?

A star begins its time on the main sequence with 10 solar masses.As it enters the red giant phase,it transfers 5 solar masses to a binary companion.How will the star end its life?

How is a neutron star supported against its own gravity?

What is the source of most of the carbon and oxygen in the interstellar medium?

Which of the following does NOT generate its energy through fusion?

Which of the following fusion reactions does NOT occur during a massive star's lifetime?

Which of the following is responsible for electron degeneracy pressure?