<p>This paper, <a href="https://arxiv.org/abs/1712.05451" rel="nofollow noreferrer">Quasi-Periodic Behavior of Mini-Disks in Binary Black Holes Approaching Merger</a>, which shares authors with the paper linked in the question, sheds some light on the terminology.</p>

<blockquote>
  <p>We present the first magnetohydrodynamic simulation in which a
  circumbinary disk around a relativistic binary black hole feeds mass
  to individual accretion disks ("mini-disks") around each black hole.</p>
</blockquote>

<p>They are talking about active binary black hole systems. The system as a whole has an accretion disk, the circumbinary disk, and each black hole has its own accretion disk, which they call the mini-disk.</p>

CC BY-SA 4.0
2019-03-13T10:40:30.857Z
2019-03-13T10:40:30.857Z
PM 2Ring
<p>What is meant by the "mini disk" of a blackhole? Is it the same as accretion disk? If not, whats the difference? </p>

<p>Eg: In the abstract of this paper <a href="https://arxiv.org/abs/1806.05697" rel="nofollow noreferrer">https://arxiv.org/abs/1806.05697</a> it is mentioned "When the accretion rate is relatively high, the circumbinary disk, accretion streams, and mini-disks combine to emit light in the UV/EUV bands"</p>

CC BY-SA 4.0
2019-03-13T07:57:40.787Z
Can you put some link, where did you read it? I never heard from this before.
peterh
<black-hole><gravity><accretion-discs>
Mini disk of a blackhole meaning
Abi
# Mini disk of a blackhole meaning

(Asked by: username_0 on 2019-03-13)

What is meant by the "mini disk" of a blackhole? Is it the same as accretion disk? If not, whats the difference?

Eg: In the abstract of this paper <https://arxiv.org/abs/1806.05697> it is mentioned "When the accretion rate is relatively high, the circumbinary disk, accretion streams, and mini-disks combine to emit light in the UV/EUV bands"

**Tags:** black-hole, gravity, accretion-discs
> **Comments:**
> **username_1**: Can you put some link, where did you read it? I never heard from this before.  

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## 1 answers

### Answer by username_2 on 2019-03-13. Score: 3 | Accepted answer

This paper, [Quasi-Periodic Behavior of Mini-Disks in Binary Black Holes Approaching Merger](https://arxiv.org/abs/1712.05451), which shares authors with the paper linked in the question, sheds some light on the terminology.

> We present the first magnetohydrodynamic simulation in which a
> circumbinary disk around a relativistic binary black hole feeds mass
> to individual accretion disks ("mini-disks") around each black hole.

They are talking about active binary black hole systems. The system as a whole has an accretion disk, the circumbinary disk, and each black hole has its own accretion disk, which they call the mini-disk.


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