Brief information about the Nova explosion
A Nova refers to a rapid upsurge in the brightness of a star and is recognized to be caused by stars which are re-exploded after being dormant for over many years. The light is emitted from stars because of nuclear fusion reactions in its core by which two atoms combine, which ultimately transform into a new atom.
In the core of a star, commonly, two separate hydrogen atoms convert into a helium atom, resulting in a spontaneous increase in energy, which also releases ample energy during the fusion reactions. When the hydrogen atoms are used up, the stars, which are more likely to be the size of the sun, slough off their outer surface and ultimately become very hot and small, which is known as white dwarfs. The “White Dwarf” is the inactive core of stars that use up all of their hydrogen fuel.
White dwarfs were found to be composed of oxygen and carbon. Spectroscopy typically indicates that the light that is emitted from such stellar objects is observed to be either helium or hydrogen-dominated. It is worth mentioning that stars sometimes come in pairs, which are called binaries, where two stars orbit around each other.
As a result, one of the stars in a binary system is a white dwarf alongside others, evolving into a red giant. Hence, the white dwarf could gravitationally be attracting some amount of gas from the atmosphere of a red giant. Through this process, hydrogen reaches the surface of the significantly hot white dwarf it quickly ignites, further creating a large nuclear explosion on the surface. This is what we visualize in our sky known as nova.
White Dwarf and Red giant
In the universe, the absolute fate of stars is determined by their initial mass, and a white dwarf is a core that is left behind after a dying star exhausts its nuclear fuel, which induces a nova explosion. The majority of white dwarfs are created after a star uses up its hydrogen in its outer layer, which ultimately forms a “planetary nebula”, leaving behind around earth size inner core. On the other hand, other white dwarfs within binary systems often explode as a nova.
In general, it further not create a black hole or neutron star. The stars that have a higher mass often explode as supernovae. Besides, white dwarfs no longer propel nuclear fusion that produces ample energy, and hence, they remain hot for a longer timeframe. Many astronomers used the luminosity of white dwarfs to figure out how long ago the formation of stars began in a particular area of the universe.
A Red Giant is created after a star has run out of its hydrogen fuel, which initiates thermonuclear fusion in a shell near the core and eventually dies. A star upholds its stability by a fine equilibrium between its own gravity, which holds it together alongside the outwards surface pressure which is caused due to the thermonuclear fusion taking place at the core. Furthermore, the energy at the surface of the star hence becomes degenerate, which makes the surface of the star become cool, turning from white to red. That’s why it is called Red Giant.
An older star about to explode Nova explosion
According to NASA T, Corona Borealis is a pair of stars situated approximately 3,000 light years away. In this region of the universe, recurrent nova explosions have been seen from Earth every 80 years, and various space agencies show that it will be visible again this year before September. When the explosion comes onto the Earth, it will be the brightest nova explosion that is yet to be witnessed by all human beings. In 1946, the last detailed explosion from T Coronae Borealis, which indicated a cool white dwarf star and a hot red giant star, was experienced by every living being on our planet.
FAQ
Can we see Nova Explosion?
Yes, we see Nova Explosion
Are we at a safe distance from T Corona Borealis?
Yes, we are at a safe distance from T Corona Borealis.
