Exam 13: Stellar Evolution: the Lives and Deaths of Stars

Noting the main sequence turnoff mass in a star cluster allows you to determine its

Type I supernovae result from white dwarf stars that have reached a mass of solar masses from material transferred by a giant companion.

Blue stragglers are among the first stars formed in a cluster.

Under what conditions will a nova occur?

A surface explosion on a white dwarf, caused by falling matter from the atmosphere of its binary companion, creates what kind of object?

Supernova 1987A matched the theoretical predictions for Type I supernovae well.

Novae and Type II supernovae are essentially the same phenomena.

Where was supernova 1987A located?

The initial rise off the main sequence in stage 8 comes from gravitational energy of the contracting helium core.

A white dwarf has the mass of the Sun and the volume of

The least massive red main- sequence stars may have lifetimes of a trillion years.

We find most stars still on the main sequence because this stage takes .

In the light curve of a nova, the rise to maximum luminosity takes only a few _ .

Compared to the interstellar medium, the gases in a planetary nebula will be richer in helium and carbon.

While luminous enough to be seen with the naked eye, Supernova 1987A was, in fact, in our companion galaxy, the Large Magellanic Cloud.

Type II supernovae occur when their cores start making

A star may undergo two or more red giant expansion stages.

After reaching its peak luminosity in hours or days, a nova declines in brightness over a period of a few before returning to its pre- explosion luminosity.

A star system may undergo two or more nova outbursts.

If the turn- off point of a cluster lies about type F, this cluster is very .