what is a white dwarf quizlet ?
what is a white dwarf quizlet？
White Dwarf. a star, approximately the size of the earth, that has undergone gravitational collapse and is in the final stage of evolution for low-mass stars, beginning hot and white and ending cold and dark (black dwarf)
Thereof,What is defined as a white dwarf?
White dwarfs are stars that have burned up all of the hydrogen they once used as nuclear fuel. Fusion in a star's core produces heat and outward pressure, but this pressure is kept in balance by the inward push of gravity generated by a star's mass.
Considering this,What is true about a white dwarf quizlet?
What is a White Dwarf? Cannot be larger than 1.4M sun. - Electrons would have to travel faster than the speed of light to exceed this. - Electrons respond to compression by moving faster, which makes the degeneracy pressure strong enough to resist the greater force of gravity.
Accordingly,How are white dwarfs created quizlet?
White dwarves are formed after a dying star sheds its outer layer in a planetary nebula, leaving its white-hot, dense core. A neutron star results from a star that was so massive that electron degeneracy pressure was not sufficient to prevent the further gravitational collapse of the star's core.
Furthermore,What are the characteristics of white dwarf quizlet?
What is a white dwarf? the corpse of a low-mass star, supported against the crush of gravity by electron degeneracy pressure.
How does a white dwarf form?
A white dwarf is what stars like the Sun become after they have exhausted their nuclear fuel. Near the end of its nuclear burning stage, this type of star expels most of its outer material, creating a planetary nebula. Only the hot core of the star remains.
What is the white dwarf limit quizlet?
Because nothing can move faster than light, a white dwarf cannot be more massive than 1.4Msun, the white dwarf limit. Also called the Chandrasekhar limit.
Which is a true statement about a white dwarf a white dwarf?
The statements which are true with the white dwarf are it is the result of the core collapse of a low mass star that sheds its outer layers and it cools down to become white dwarf. Explanation: The white dwarf is one which is formed from the sun and sheds its outer layers in order to form a white nebula.
What is a white dwarf quizlet Chapter 12?
A white dwarf has the mass of the Sun and the volume of. Earth. Black dwarfs are. not found yet; the oldest, coldest white dwarf in the Galaxy has not cooled enough yet.
What is the difference between nova and a white dwarf supernova quizlet?
What is the difference between a novae and a supernovae? Nova: can occur multiple times for the same star. Always happen in a binary system with a white dwarf. Supernova: 1 million times more energy, only associated with a star once, classified into a type 1 (binary) and a type 2 (can occur in isolation).
Why white dwarf is white?
White dwarf stars, so called because of the white colour of the first few that were discovered, are characterized by a low luminosity, a mass on the order of that of the Sun, and a radius comparable to that of Earth.
What is the luminosity of a white dwarf?
After a billion years the typical white dwarf is down to 0.001 the luminosity of the Sun.
What is a white dwarf star made of?
The core that is left behind will be a white dwarf, a husk of a star in which no hydrogen fusion occurs. Smaller stars, such as red dwarfs, don't make it to the red giant state. They simply burn through all of their hydrogen, ending the process as a dim white dwarf.