Which of the following is a remnant of a dead star?

Bottom line: White dwarfs are the remnants of dead stars. They are the dense stellar cores left behind after a star has exhausted its fuel supply and blown its gases into space.

What a low mass star becomes at the end of its life?

THE DEATH OF A LOW OR MEDIUM MASS STAR After a low or medium mass or star has become a red giant the outer parts grow bigger and drift into space, forming a cloud of gas called a planetary nebula. The blue-white hot core of the star that is left behind cools and becomes a white dwarf.

Which of the following are characteristics of a low mass star?

Low-Mass Stars fuse hydrogen into helium, the proton-proton cycle. The classic low-mass star is the Sun. Low-mass stars have large convection zones when compared to intermediate- and high-mass stars. In very low-mass stars , the Convection Zone goes all the way to the star’s core!

What is low mass star?

Low mass stars. Low mass stars (stars with masses less than half the mass of the Sun) are the smallest, coolest and dimmest Main Sequence stars and orange, red or brown in colour. Low mass stars use up their hydrogen fuel very slowly and consequently have long lives.

What are remnants of stars?

A supernova remnant (SNR) is the structure resulting from the explosion of a star in a supernova. The supernova remnant is bounded by an expanding shock wave, and consists of ejected material expanding from the explosion, and the interstellar material it sweeps up and shocks along the way.

What type of stellar remnant do low and medium mass stars leave behind?

After a low- or medium-mass star has become a red giant, the outer parts grow bigger and drift into space, forming a cloud of gas called a planetary nebula. The core of the star that is left behind cools and becomes a white dwarf.

What is the end product of a low mass star?

Over its lifetime, a low mass star consumes its core hydrogen and converts it into helium. The core shrinks and heats up gradually and the star gradually becomes more luminous. Eventually nuclear fusion exhausts all the hydrogen in the star’s core.

How are low mass stars formed?

It is generally accepted that stars form by the gravitational collapse of cold, dense, and dusty molecular cloud cores. These cloud cores are not distributed randomly in space, but are often aligned along gas filaments, the origin which we do not yet fully understand.

What elements do low mass stars produce?

Low-mass stars eject large amounts of helium, carbon, and nitrogen produced in the shell burnings. The process is more gradual than for high-mass stars; the ejection of the stellar envelope lasts more than 100,000 years, compared with a few seconds for a core-collapse supernova.

How does a low mass star form?

While massive stars and their final stages dominate the energy input into the interstellar medium, low-mass stars constitute most of the total mass in our galaxy. It is generally accepted that stars form by the gravitational collapse of cold, dense, and dusty molecular cloud cores.

How is a low mass star formed?

Abstract Low-mass stars are generally understood to form by the gravitational collapse of the dense molecular clouds known as starless cores.

What are the names of low mass stars?

Notable small stars

What happens to the outer layers of a low mass star?

For low-mass stars (left hand side), after the helium has fused into carbon, the core collapses again. As the core collapses, the outer layers of the star are expelled. A planetary nebula is formed by the outer layers. The core remains as a white dwarf and eventually cools to become a black dwarf.

What is the life cycle of a low mass star?

The life cycle of a low mass star (left oval) and a high mass star (right oval). The illustration above compares the different evolutionary paths low-mass stars (like our Sun) and high-mass stars take after the red giant phase. For low-mass stars (left hand side), after the helium has fused into carbon, the core collapses again.

What is the life cycle of a high-mass star?

Like low-mass stars, high-mass stars are born in nebulae and evolve and live in the Main Sequence. However, their life cycles start to differ after the red giant phase. A massive star will undergo a supernova explosion. If the remnant of the explosion is 1.4 to about 3 times as massive as our Sun, it will become a neutron star.

What is a supernova remnant?

A supernova remnant ( SNR) is the structure resulting from the explosion of a star in a supernova. The supernova remnant is bounded by an expanding shock wave, and consists of ejected material expanding from the explosion, and the interstellar material it sweeps up and shocks along the way.