Cosmology and Nongalactic Astrophysics · arXiv:2406.08728 v2 · submitted 13 Jun 2024
Exploring Faraday rotation signatures and population bounds for primordial magnetic black holes
The paper says
“These traits potentially suggest a robust avenue for their observational detection and differentiation.”
from the abstract · picked out as the main claim by a classifier
Reviews
Reviews by people
No person has reviewed this paper on Pith yet. A scientist listed on Pith can review it for a fee, and their review is published here whatever it concludes.
The paper
Abstract
Primordial black holes bearing magnetic charges may bypass the constraints imposed by Hawking radiation, thereby enabling reasonable present-day populations, even for masses below 1015 g–a range previously considered improbable. They could, therefore, conceivably contribute to a component of dark matter. We investigate novel Faraday rotation signatures exhibited by primordial magnetic black holes while also establishing new Parker-type bounds on their populations. For the latter, we bound the dark matter fraction from intergalactic magnetic fields in cosmic voids (f DM ≲ 10−8) and cosmic web filaments (f DM ≲ 10−4), notably eclipsing previous bounds. Exploring Faraday rotation effects, we discern a pronounced rotation of the polarization angle and the rotation measure values for extremal primordial magnetic black holes with masses Mex. BH ≳ 10−6 M⊙. This makes them potentially detectable in current observations. A comparative investigation finds that the effects are notably greater than for a neutron star, like a Magnetar, with a similar magnetic field at the surface. Moreover, the polarization angle maps for primordial magnetic black holes exhibit unique features, notably absent in other astrophysical magnetic configurations. In this context, we also introduce a simple integral measure, offering a quantitative measure for their discrimination in many scenarios. These traits potentially suggest a robust avenue for their observational detection and differentiation.
The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. No sentence in this record was written by a model.
abstract compiled · 2026-09-23 · no language-model review
How the main claim is stated: hedged possibility 1.00
What the abstract itself states, as probabilities: claims first 0.09 · states limitation 0.18 · human participants 0.01 · controlled comparison 0.58 · randomized assignment 0.01 · states quantitative result 0.99 · compares with prior results 0.95 · mentions code or data availability 0.02
The abstract, sentence by sentence
This table labels the abstract only (arXiv listing abstract v2). The number is the probability the classifier gave the label.
| Sentence | Role | The authors' own work | States the main conclusion | Strength |
|---|---|---|---|---|
| Primordial black holes bearing magnetic charges may bypass the constraints imposed by Hawking radiation, thereby enabling reasonable present-day populations, even for masses below $10^{15}\, \mathrm{g} $--a range previously considered improbable. | background 0.92 | 0.11 | 0.17 | hedged possibility 0.99 |
| They could, therefore, conceivably contribute to a component of dark matter. | interpretation 0.52 | 0.07 | 0.07 | hedged possibility 0.82 |
| We investigate novel Faraday rotation signatures exhibited by primordial magnetic black holes while also establishing new Parker-type bounds on their populations. | contribution 1.00 | 0.88 | 0.08 | asserted 0.95 |
| For the latter, we bound the dark matter fraction from intergalactic magnetic fields in cosmic voids $\left(f_{\text{ DM}} \lesssim 10^{-8}\right)$ and cosmic web filaments $\left(f_{\text{ DM}} \lesssim 10^{-4}\right)$, notably eclipsing previous bounds. | result 1.00 | 0.93 | 0.27 | asserted 1.00 |
| Exploring Faraday rotation effects, we discern a pronounced rotation of the polarization angle and the rotation measure values for extremal primordial magnetic black holes with masses $M^{\text{ex.}}_{\text{ BH}} \gtrsim 10^{-6}~ \text{M}_\odot$. | result 0.99 | 0.92 | 0.17 | asserted 1.00 |
| This makes them potentially detectable in current observations. | interpretation 0.98 | 0.50 | 0.12 | hedged possibility 0.99 |
| A comparative investigation finds that the effects are notably greater than for a neutron star, like a Magnetar, with a similar magnetic field at the surface. | result 0.98 | 0.87 | 0.06 | asserted 1.00 |
| Moreover, the polarization angle maps for primordial magnetic black holes exhibit unique features, notably absent in other astrophysical magnetic configurations. | result 0.97 | 0.84 | 0.12 | asserted 0.91 |
| In this context, we also introduce a simple integral measure, offering a quantitative measure for their discrimination in many scenarios. | contribution 0.65 | 0.94 | 0.07 | asserted 0.99 |
| These traits potentially suggest a robust avenue for their observational detection and differentiation. | interpretation 1.00 | 0.51 | 0.42 | hedged possibility 1.00 |
What kind of paper the classifier reports this is: theoretical result 0.97 · evidence from proof or derivation 0.95
What was examined, and what was not
Sources read
- arXiv listing abstract v2
Not examined
- full text
- figures and tables
- references and citing sentences
- relations to other papers
Levels run
- P abstract
Not run
- S sections
- T body sentences
- C citations
- R cross-paper relations
How the labels were made
Compiled by classifier-1.13.0 via TypeSafe API, question bank abstract-p1-20260923, 2026-09-23: 1 request, 7,668 input tokens.
Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. This record as JSON
Cited by 3 Pith papers
Reviewed papers on Pith that cite this one. The full citation record
- Evaporating cosmologically coupled black holes astro-ph.CO · Jul 2026
- Primordial regular black holes as all the dark matter. II. Non-time-radial-symmetric and loop quantum gravity-inspired metrics gr-qc · Sep 2024
- Primordial regular black holes as all the dark matter. I. Time-radial-symmetric metrics gr-qc · Sep 2024
How the literature uses it
5 arXiv papers cite this in 6 sentences
Papers citing it · 2 sentences without a confident label
Cites it as support 1 paper
-
Interestingly enough such regular PBHs can address at the same time the dark matter and the singularity problems [ref] .
Inflation driven by repulsive-like primordial black holes · Introduction · 0.99
Cites it as background 3 papers
-
The suppression of a black hole's evaporation at the end stages of its decay via Hawking radiation is predicted by several effects, such as when black holes are magnetically charged [ref] , attain extremality near the Planck mass [ref] , or quasi-extremality [ref] , or form massive remnants [ref] .
Beyond Hawking evaporation of black holes formed by dark matter in compact stars · Introduction · 0.96
-
Finally, Ref. [ref] studied signatures of primordial BHs with magnetic charge, which could be (as is often but necessarily the case) regular.
Primordial regular black holes as all the dark matter. I. Time-radial-symmetric metrics · Regular black holes · 0.89
-
[We note that the CC mechanism is most often discussed in connection with regular BHs, i.e. space-times which resolve or avoid the classical singularities present in the standard Schwarzschild and Kerr metrics, and which have been widely discussed in the recent literature (see e.g. Refs. [ref] ).
Evaporating cosmologically coupled black holes · Introduction · 0.99
What it cites · 73 sentences without a confident label
Uses data or values from 17 papers
-
They have established a conservative lower limit of approximately $𝒪(10^-15) G$ [ref] on the strength of IGMFs for coherence lengths $l_c≳𝒪(1) Mpc$.
2306.05132 · Characteristics of astrophysical and cosmic magnetic fields · 0.98
-
Here, we have estimated the regeneration time $t_reg^void, gal$ using the field strength $B^void, gal$ and assuming a magnetization rate $10^-16$G/Gyr [ref] .
Resistive Magnetic Field Generation at Cosmic Dawn · Characteristics of astrophysical and cosmic magnetic fields · 0.88
-
These magnetic fields have typical strengths of $𝒪(10^-9) G$ [ref] with coherence lengths $𝒪(1) Mpc$ [ref] .
Discovery of Magnetic Fields Along Stacked Cosmic Filaments as Revealed by Radio and X-Ray Emission · Characteristics of astrophysical and cosmic magnetic fields · 0.98
Compares with 4 papers
-
Although Parker-type bounds on MBHs have previously been explored —for instance, from galactic magnetic fields [ref] , yielding a limit on their dark matter fraction $f_DM ≲𝒪(10^-3)$— we find that constraints from cosmic void and cosmic filament magnetic fields provide novel and more stringent bounds on the dark matter fraction than those extant in the literature [ref] .
Astrophysical hints for magnetic black holes · Summary and conclusions · 0.93
-
Although Parker-type bounds on MBHs have previously been explored —for instance, from galactic magnetic fields [ref] , yielding a limit on their dark matter fraction $f_DM ≲𝒪(10^-3)$— we find that constraints from cosmic void and cosmic filament magnetic fields provide novel and more stringent bounds on the dark matter fraction than those extant in the literature [ref] .
Parker Bound and Monopole Pair Production from Primordial Magnetic Fields · Summary and conclusions · 0.93
-
Although Parker-type bounds on MBHs have previously been explored —for instance, from galactic magnetic fields [ref] , yielding a limit on their dark matter fraction $f_DM ≲𝒪(10^-3)$— we find that constraints from cosmic void and cosmic filament magnetic fields provide novel and more stringent bounds on the dark matter fraction than those extant in the literature [ref] .
Parker Bounds on Monopoles with Arbitrary Charge from Galactic and Primordial Magnetic Fields · Summary and conclusions · 0.93
Cites as background 63 papers
-
This concept forms the essence of Parker bounds and has been widely employed in previous studies [ref] .
Protogalactic Extension of the Parker Bound · Theoretical framework for Parker-type bounds · 0.85
-
This concept forms the essence of Parker bounds and has been widely employed in previous studies [ref] .
Astrophysical hints for magnetic black holes · Theoretical framework for Parker-type bounds · 0.85
-
These fields [ref] —traditionally referred to as intergalactic magnetic fields (IGMFs), represent magnetic fields that pervade large-scale structures in the universe; manifesting themselves, for instance, in the voids and filaments of the cosmic web.
Magnetic Field Seeding by Galactic Winds · Characteristics of astrophysical and cosmic magnetic fields · 0.99
Challenges and discussion
Know something about this paper? Leave a comment.
Come back by email
A short list of the week's newly reviewed papers. Nothing is sent until you confirm from your inbox, and every email has a link that stops it. No account.
No comments yet.
Sign in to comment