<p>Core collapse electron capture supernovae are expected to leave a low-mass, low speed neutron star remnant (e.g. <a href="https://arxiv.org/abs/1802.05274" rel="nofollow noreferrer">Gessner &amp; Janka 2018</a>).</p>

CC BY-SA 4.0
2021-08-04T23:33:51.370Z
2021-08-04T23:33:51.370Z
ProfRob
<p>A neutron star.</p>
<p><a href="https://arxiv.org/pdf/astro-ph/0212469.pdf" rel="nofollow noreferrer">Heger et. al. (2002) state</a></p>
<blockquote>
<p>[There is] a narrow range, ∼ 9−10 M⊙, where degenerate oxygen-neon cores are formed that either collapse due to electron capture (Barkat et al. 1974;
Miyaji et al. 1980; Nomoto 1984; Habets 1986;
Miyaji &amp; Nomoto 1987; Nomoto 1987; Nomoto &amp;
Hashimoto 1988) and make a neutron star</p>
</blockquote>
<p>Such relatively small stars may not supernova at all. They may lose their envelope and produce white dwarfs. They are on the border between those stars that will undergo collapse and those that won't.  This is why they are rare.</p>
<p>The supernova, if it forms, will be faint.</p>

CC BY-SA 4.0
2021-08-04T23:16:57.973Z
2022-07-04T08:00:46.243Z
2022-07-04T08:00:46.243Z
James K
<p>Somehow, none of the many articles I've read about the recent discovery of electron-capture supernovae has specifically said what they leave behind as remnants.....</p>

CC BY-SA 4.0
2021-08-04T23:06:34.750Z
Perhaps you could cite or link to some of those articles.  It would make it much clearer what kind of research you've already done.
James K
<star><observational-astronomy><supernova><neutron-star><white-dwarf>
What does an electron-capture supernova leave behind? A white dwarf, a neutron star or nothing?
Kurt Hikes
# What does an electron-capture supernova leave behind? A white dwarf, a neutron star or nothing?

(Asked by: username_0 on 2021-08-04)

Somehow, none of the many articles I've read about the recent discovery of electron-capture supernovae has specifically said what they leave behind as remnants.....

**Tags:** star, observational-astronomy, supernova, neutron-star, white-dwarf
> **Comments:**
> **username_1**: Perhaps you could cite or link to some of those articles.  It would make it much clearer what kind of research you've already done.  

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## 2 answers

### Answer by username_2 on 2021-08-04. Score: 3

Core collapse electron capture supernovae are expected to leave a low-mass, low speed neutron star remnant (e.g. [Gessner & Janka 2018](https://arxiv.org/abs/1802.05274)).


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### Answer by username_1 on 2021-08-04. Score: 3

A neutron star.

[Heger et. al. (2002) state](https://arxiv.org/pdf/astro-ph/0212469.pdf)

> [There is] a narrow range, ∼ 9−10 M⊙, where degenerate oxygen-neon cores are formed that either collapse due to electron capture (Barkat et al. 1974;
> Miyaji et al. 1980; Nomoto 1984; Habets 1986;
> Miyaji & Nomoto 1987; Nomoto 1987; Nomoto &
> Hashimoto 1988) and make a neutron star

Such relatively small stars may not supernova at all. They may lose their envelope and produce white dwarfs. They are on the border between those stars that will undergo collapse and those that won't. This is why they are rare.

The supernova, if it forms, will be faint.


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