Pith Number

pith:FLM44QBS

pith:2025:FLM44QBSVHUEICURFR55T3A7BL

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Universal Relations with Dynamical Tides

Abhishek Hegade K. R., Jayana A. Saes, Nicol\'as Yunes

Quasi-universal relations connect the static tidal deformability of neutron stars to its leading dynamical correction with at most 5 percent equation-of-state variation.

arxiv:2511.19626 v2 · 2025-11-24 · gr-qc · nucl-th

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Claims

C1strongest claim

We identify new quasi-universal relations between the static, dimensionless tidal deformability (Λ⁰) and its leading-order dynamical correction (Λ²), as well as between Λ⁰ and √(Λ⁰/Λ²) ≡ Mω*, ... the equation-of-state dependence does not exceed ∼5% for the Λ⁰–Λ² relation and ∼2.8% for the Λ⁰–Mω* relation.

C2weakest assumption

That the 59 chosen equations of state form a representative sample and that the small-frequency expansion remains accurate in the relevant regime for binary neutron-star inspirals.

C3one line summary

New quasi-universal relations connect static tidal deformability Λ⁰ to its dynamical correction Λ² and to Mω* with equation-of-state scatter below 5% and 2.8% respectively across 59 models.

References

64 extracted · 64 resolved · 27 Pith anchors

[1] How do the low-frequency expansion of [36] and the EOB mode-sum [34] compare to the dynamical ap- proach of [41]? In particular, over what frequency and compactness range do these approximations remai

[2] What quasi-universal relations exist among the coeffi- cients appearing in the low-frequency expansion of the dynamical tidal response function, and to what extent are these relations insensitive to t

[3] Neutron star equation of state via gravitational wave observations 2009 · arXiv:1110.3759

[4] C., Chirenti , C., & Lamb , F 2019 · doi:10.3847/1538-4357/ab4ef9

[5] Neutron stars as extreme gravity probes, 2024

Formal links

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Cited by

1 paper in Pith

The Good, the Bad, and the Subtle: Relativistic mode sums for neutron-star tidal response

Receipt and verification

First computed	2026-05-18T03:09:32.953444Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2ad9ce4032a9e8440a912c7bd9ec1f0afa5cfa770c83cf309714d0c15f98e5d9

Aliases

arxiv: 2511.19626 · arxiv_version: 2511.19626v2 · doi: 10.48550/arxiv.2511.19626 · pith_short_12: FLM44QBSVHUE · pith_short_16: FLM44QBSVHUEICUR · pith_short_8: FLM44QBS

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/FLM44QBSVHUEICURFR55T3A7BL \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 2ad9ce4032a9e8440a912c7bd9ec1f0afa5cfa770c83cf309714d0c15f98e5d9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "74ce9a70dd75434f5f4f9372cc483a86147d6993a43310ae057c3734ace59132",
    "cross_cats_sorted": [
      "nucl-th"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2025-11-24T19:01:38Z",
    "title_canon_sha256": "508e6e4f80783e1a3f491df6129111046a55584a5a93d8befe946267dbfce623"
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    "kind": "arxiv",
    "version": 2
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}