Supernova remnants & neutron star

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Discussion Overview

The discussion revolves around the nature of supernova remnants, specifically addressing whether all supernovae produce nebulae, the types of stellar remnants formed, and the outcomes of specific historical supernovae, such as the Kepler supernova (SN 1604).

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants inquire whether all supernovae produce nebulae and whether all supernova remnants contain neutron stars.
  • One participant states that some supernova remnants can form black holes instead of neutron stars.
  • Another participant discusses the outcomes of different types of supernovae, mentioning that while many become neutron stars, some may become black holes, although observational evidence for black holes formed from supernovae is lacking.
  • There is a question about the specific outcome of the Kepler supernova, with one participant confirming that it resulted in a nebula rather than a neutron star.
  • Participants express uncertainty about the longevity of stellar remnants from supernovae and whether they persist indefinitely.

Areas of Agreement / Disagreement

Participants generally agree that not all supernova remnants contain neutron stars, as some can form black holes. However, there is no consensus on the longevity of remnants or the specific outcomes of all supernovae, particularly regarding the Kepler supernova.

Contextual Notes

The discussion includes various assumptions about the types of remnants formed from supernovae and the observational challenges associated with detecting neutron stars and black holes. There are also unresolved questions about the duration for which remnants persist.

Who May Find This Useful

Individuals interested in astrophysics, particularly those studying stellar evolution, supernovae, and their remnants, may find this discussion relevant.

shounakbhatta
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Hello,

I want to understand: just as the Crab Nebula is the result of SN 1054 and has a neutron star spinning at the center:

(a) Does all supernova produces a nebula?
(b) Does all supernova remnant has a neutron star at the center?
(c) What is the outcome of Kepler supernova i.e. SN 1604? I mean to ask has it formed a stellar remnant or a neutron star?

(d) Say, if we consider a supernova, S, which has happened in the year 1000, then the stellar remnant, the neutron star or whatever other outcomes have come in that supernova, does it remain forever? I mean to say, is there a specific time duration, after which things die out and nothing is there from that specific supernova?

Thanks.
 
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shounakbhatta said:
(b) Does all supernova remnant has a neutron star at the center?

No, some of them form black holes.
 
Some stars are destroyed by the explosion [pair instability supernova], most become neutron stars, and some possibly become black holes - although we have no observational evidence of a black hole that formed as a consequence of a supernova. Neutron stars, like white dwarfs, are believed capable of surviving for many billions of years before succumbing to old age and becoming black dwarfs. The universe is believed to be too young for this to have yet happened. Neutron stars are also difficult to detect. They are very small and nearly invisible below x ray wavelengths. Neutron stars are also considered strong candidates for gamma ray bursts, some of which are believed to be the result of neutron star mergers. It is also believed such mergers can lead to the formation of a black hole.
 
One question: Is there any stellar remnant or a neutron star as a result of the Kepler super nova?
 
Yes, an image taken with the Chandra X-ray observatory is here http://chandra.harvard.edu/photo/2012/kepler/. This little wisp of glowing dust and gas is all that remains. It was produced by a type Ia supernova, which destroys the progenitor star.
 
That means it does not have a neutron star?
 
Yes, it only left that little puff of smoke.
 

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