Under what circumstances will a nova occur?

Under what circumstances will a nova occur?

A nova occurs when the white dwarf, which is the dense core of a once-normal star, “steals” gas from its nearby companion star. When enough gas builts up on the surface of the white dwarf it triggers an explosion. For a brief time, the system can shine up to a million times brighter than normal.

What are the differences between a nova a white dwarf supernova and a massive star supernova?

What is this? A nova does not destroy its host star whereas a super nova does. Since so much mass is ejected in a supernova it disrupts the star in which it occurs. This results in another difference which is that a nova can be seen at the same place multiple times, on the other hand, a supernova cannot.

What two things could happen if a white dwarf star in a binary system accretes mass from a companion?

If a white dwarf gradually accretes mass from a binary companion, or merges with a second white dwarf, the general hypothesis is that its core will reach the ignition temperature for carbon fusion as it approaches the Chandrasekhar mass.

Can a white dwarf ever explode?

A carbon–oxygen white dwarf that approaches this mass limit, typically by mass transfer from a companion star, may explode as a type Ia supernova via a process known as carbon detonation; SN 1006 is thought to be a famous example.

What is the difference between a white dwarf and a black dwarf?

A main sequence star that lacks the mass necessary to explode in a supernova will become a white dwarf, a ‘dead’ star that has burned through all of its hydrogen and helium fuel. No longer emitting heat or light, the white dwarf will become a black dwarf. Because it emits no radiation, it is nearly impossible to see.

What happens to a white dwarf when it explodes in a nova event?

What happens to a white dwarf when it explodes in a nova event? Only some of the accumulated material on the surface of the white dwarf explodes, so it slowly gains mass over time.

What are the main differences between novae and supernovae?

A nova is a star that brightens suddenly by 100 to 10,000 times in a single day. supernovae explosions are the only source of elements heavier than iron, such as nickel, copper, gold, silver, etc.

Which of the following is true about differences between novae and supernovae?

Which of the following is not true about differences between novae and supernovae? Supernovae eject gas into space but novae do not. Will our Sun ever undergo a white dwarf supernova explosion?

What happens in a white dwarf supernova?

In this type of supernova, a white dwarf in a binary star system gains mass from its companion. A white dwarf is so dense that fusion sweeps rapidly out from the center, releasing the tremendous energy that blows the star apart.

What type of supernova can only occur in binary systems?

A(n) “white dwarf supernova” can occur only in a binary system, and all such events are thought to have the same luminosity.

What are the characteristics of a white dwarf supernova?

A white dwarf supernova in a galaxy of only old stars. Two massive star supernovae occur in the same young star cluster. A massive star supernova leaves behind no detectable compact object. A massive star in a binary system explodes. An isolated star like our Sun explodes as a white dwarf supernova.

What is the difference between two massive star supernovae?

Two massive star supernovae occur in the same young star cluster. A massive star supernova leaves behind no detectable compact object. A massive star in a binary system explodes. An isolated star like our Sun explodes as a white dwarf supernova. A young (5 million years) star explodes as a white dwarf supernova.

What is a nova and how does it happen?

A nova occurs when the white dwarf, which is the dense core of a once-normal star, “steals” gas from its nearby companion star. When enough gas builts up on the surface of the white dwarf it triggers an explosion.

What happens when a white dwarf becomes a neutron star?

If mass of the white dwarf becomes so great that the electrons would have to move faster than light to resist the gravity, the white dwarf must collapse into a neutron star. This limit is about 1.4 MSun. Choose the correct description of what accretion disks are, and why do we find them only in close binary systems.