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Strongly magnetized accretion in two ultracompact binary systems

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Paper breakdownThe authors' claims, conditions and measurements, as JSON Signed receiptProof this review has not been altered
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Thomas J. Maccarone (Texas Tech), Thomas Kupfer (Hamburg, Texas Tech), Edgar Najera Casarrubias (Texas Tech), Liliana Rivera Sandoval (University of Texas Rio Grande Valley), Aarran Shaw (Butler, University of Nevada Reno), Chris Britt (Space Telescope Science Institute)
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Jan van Roestel (Amsterdam), Dave Zurek (American Museum of Natural History)

High Energy Astrophysical Phenomena · Submitted 23 Feb 2023

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim We present the discoveries of two of AM CVn systems, Gaia14aae and SDSS~J080449.49+161624.8, which show X-ray pulsations at their orbital periods, indicative of magnetically collimated accretion.

how it is stated · asserted 0.75 read the record →

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arXiv ID2302.12318 (version 2)
Pith IDSO6WMNAB, Pith's permanent record of this paper and its review
CitationAarran Shaw (Butler, Chris Britt (Space Telescope Science Institute), Dave Zurek (American Museum of Natural History), Edgar Najera Casarrubias (Texas Tech), Jan van Roestel (Amsterdam), Liliana Rivera Sandoval (University of Texas Rio Grande Valley), Texas Tech), Thomas J. Maccarone (Texas Tech), Thomas Kupfer (Hamburg, University of Nevada Reno). "Strongly magnetized accretion in two ultracompact binary systems." arXiv:2302.12318 (2023). https://pith.science/paper/SO6WMNAB
Claim paper

The compiled record

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. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.

Open the compiled record

Compiled by classifier-1.13.0 via TypeSafe API, question bank abstract-p1-20260923, 2026-09-23: 1 request, 3,804 input tokens.

What the abstract itself states, as probabilities: claims first 0.05 · states limitation 0.14 · human participants 0.01 · controlled comparison 0.48 · randomized assignment 0.01 · states quantitative result 0.93 · compares with prior results 0.88 · mentions code or data availability 0.02.

The abstract, sentence by sentence

arXiv listing abstract v2. Results and the main claim are underlined; .

We present the discoveries of two of AM CVn systems, Gaia14aae and SDSS~J080449.49+161624.8, which show X-ray pulsations at their orbital periods, indicative of magnetically collimated accretion. Both also show indications of higher rates of mass transfer relative to the expectations from binary evolution driven purely by gravitational radiation, based on existing optical data for Gaia14aae, which show a hotter white dwarf temperature than expected from standard evolutionary models, and X-ray data for SDSS~J080449.49+161624.8 which show a luminosity 10-100 times higher than those for other AM~CVn at similar orbital periods. The higher mass transfer rates could be driven by magnetic braking from the disk wind interacting with the magnetosphere of the tidally locked accretor. We discuss implications of this additional angular momentum transport mechanism for evolution and gravitational wave detectability of AM CVn objects.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#sentencerolethe authors' own workstates the main conclusionstrength
s0 We present the discoveries of two of AM CVn systems, Gaia14aae and SDSS~J080449.49+161624.8, which show X-ray pulsations at their orbital periods, indicative of magnetically collimated accretion. contribution 0.59 0.96 0.66 asserted 0.75
s1 Both also show indications of higher rates of mass transfer relative to the expectations from binary evolution driven purely by gravitational radiation, based on existing optical data for Gaia14aae, which show a hotter white dwarf temperature than expected from standard evolutionary models, and X-ray data for SDSS~J080449.49+161624.8 which show a luminosity 10-100 times higher than those for other AM~CVn at similar orbital periods. result 0.99 0.63 0.16 hedged possibility 0.63
s2 The higher mass transfer rates could be driven by magnetic braking from the disk wind interacting with the magnetosphere of the tidally locked accretor. interpretation 1.00 0.20 0.16 hedged possibility 1.00
s3 We discuss implications of this additional angular momentum transport mechanism for evolution and gravitational wave detectability of AM CVn objects. interpretation 0.85 0.49 0.12 unclear 0.92

What kind of paper the classifier reports this is: empirical study 1.00 · evidence from observation or experiment 0.80.

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

Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

The paper
Original abstract

We present the discoveries of two of AM CVn systems, Gaia14aae and SDSS~J080449.49+161624.8, which show X-ray pulsations at their orbital periods, indicative of magnetically collimated accretion. Both also show indications of higher rates of mass transfer relative to the expectations from binary evolution driven purely by gravitational radiation, based on existing optical data for Gaia14aae, which show a hotter white dwarf temperature than expected from standard evolutionary models, and X-ray data for SDSS~J080449.49+161624.8 which show a luminosity 10-100 times higher than those for other AM~CVn at similar orbital periods. The higher mass transfer rates could be driven by magnetic braking from the disk wind interacting with the magnetosphere of the tidally locked accretor. We discuss implications of this additional angular momentum transport mechanism for evolution and gravitational wave detectability of AM CVn objects.

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References
How the literature uses it

4 arXiv papers cite this in 4 sentences

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

What it cites · 5 sentences without a confident label

Uses data or values from 2 papers
  • If the solution is that magnetic braking dominates the angular momentum transport in this system, then the magnetic field should be about $10^4$ G, following figure 2 of [ref] .

    Magnetic braking in ultracompact binaries · Implications of the magnetic braking scenario for angular momentum transport mechanisms in AM CVn systems · 0.80

  • The Gaia parallax distance estimate for SDSS J0804 is 999$±^185_134$ pc [ref] yielding $L_X$=$3×10^32$ erg/sec, a factor of 10-100 times brighter than the X-ray luminosities for other AM CVn at similar orbital periods [ref] .

    X-ray luminosity versus orbital period of AM CVn systems · X-ray fluxes and luminosities · 0.90

Cites as background 1 paper
  • The LISA verification binaries are objects known, and electromagnetically characterized, at the time of LISA's launch, and these include substantial numbers of double white dwarf binaries, both with and without mass transfer between the two objects [ref] .

    Astrophysics with the Laser Interferometer Space Antenna · Introduction · 0.94

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