A white dwarf formed by a supernova, possible?

AI Thread Summary
A supernova typically results in the remnant core collapsing into a neutron star or black hole, depending on its mass. Current models suggest that a core cannot become a white dwarf after a supernova, as it would require sufficient mass to form a neutron star. The process involves the collapse of the core into neutron-degenerate matter, triggered by the exhaustion of fusionable fuel, particularly when an iron core forms. The outer layers of the star collapse inward, leading to a violent explosion characteristic of a supernova. Thus, the formation of a white dwarf from a supernova event is not supported by current astronomical understanding.
RetardedBastard
Messages
113
Reaction score
0
It is my general understanding that once a star goes supernova, the remnant core of the dead star will (always?) gravitationally contract into either a neutron star, or if massive enough, into a black hole.

However, does current observation/model rule out a scenario whereupon a star goes supernova and blows off enough mass that the remaining core does not have sufficient mass to form a neutron star or black hole. Instead the remnant core contracts into a white dwarf?
 
Last edited:
Astronomy news on Phys.org
The core wouldn't form a white dwarf because you wouldn't go supernova unless you had already burned all the fussionable fuel and were down to an iron core.
You could possibly strip the atmosphere from a main sequence companion to leave it as a white dwarf.
 
If I’m not mistaken, it is the collapse of the core into neutron-degenerate matter (which requires a large star in the region of 8 to 20 solar masses) which causes the supernova. Prior to the supernova, the iron core will probably resemble a white dwarf in size but because the fusion process has ceased due to the fact that iron is the most stable of elements, the outer layers would begin to exert massive pressure on the core and eventually, the electrons which have already filled every quantum state possible, have no where to go but into the protons that make up the iron nuclei (this releases a massive amount of neutrinos which is the calling card of the making of a neutron star). The planet sized core collapses to about 10-12 km in diameter in a fraction of a second. The outer layers then collapse inwards to fill the void, colliding with the surface of the neutron core and an effect akin to a hammer hitting a solid rubber ball takes place: the immediate outer layers recoil and pass through the outer layers of the star with extreme force causing the supernova. I believe the process of the core collapsing into neutron degenerate material is intrinsic with the supernova explosion.
 
TL;DR Summary: In 3 years, the Square Kilometre Array (SKA) telescope (or rather, a system of telescopes) should be put into operation. In case of failure to detect alien signals, it will further expand the radius of the so-called silence (or rather, radio silence) of the Universe. Is there any sense in this or is blissful ignorance better? In 3 years, the Square Kilometre Array (SKA) telescope (or rather, a system of telescopes) should be put into operation. In case of failure to detect...
Thread 'Could gamma-ray bursts have an intragalactic origin?'
This is indirectly evidenced by a map of the distribution of gamma-ray bursts in the night sky, made in the form of an elongated globe. And also the weakening of gamma radiation by the disk and the center of the Milky Way, which leads to anisotropy in the possibilities of observing gamma-ray bursts. My line of reasoning is as follows: 1. Gamma radiation should be absorbed to some extent by dust and other components of the interstellar medium. As a result, with an extragalactic origin, fewer...
This thread is dedicated to the beauty and awesomeness of our Universe. If you feel like it, please share video clips and photos (or nice animations) of space and objects in space in this thread. Your posts, clips and photos may by all means include scientific information; that does not make it less beautiful to me (n.b. the posts must of course comply with the PF guidelines, i.e. regarding science, only mainstream science is allowed, fringe/pseudoscience is not allowed). n.b. I start this...
Back
Top