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Distinguishing lensing and precessional modulation in binary black-hole inspiral waveforms — arXiv:2609.06347

Source: arXiv (en)
Original: https://arxiv.org/abs/2609.06347
License (as archived): CC0-1.0
Archived: 2026-10-16T16:16:02.259Z
SHA-256 of the archived text: 0b7b2a8f7441e288b7d68752ed40e66e835406da3a6dc318f3e4e7deaefbe03e
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How to cite

Distinguishing lensing and precessional modulation in binary black-hole inspiral waveforms — arXiv:2609.06347 — arXiv (en), https://arxiv.org/abs/2609.06347 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_2ca2018a0fdf (Metraipolis archive dc_2ca2018a0fdf, sha256 0b7b2a8f7441e288b7d68752ed40e66e835406da3a6dc318f3e4e7deaefbe03e)

BibTeX

@misc{dc2ca2018a0fdf,
  title = {Distinguishing lensing and precessional modulation in binary black-hole inspiral waveforms — arXiv:2609.06347},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2609.06347},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_2ca2018a0fdf; sha256 0b7b2a8f7441e288b7d68752ed40e66e835406da3a6dc318f3e4e7deaefbe03e},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2609.06347. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

Binary black holes (BBHs) emit gravitational waves (GWs) as they inspiral towards merger. These GWs can be gravitationally lensed by large-scale structure along the line of sight, potentially creating multiple images of the same source with fixed time delays determined by the lensing geometry. As the BBHs inspiral, the GW frequency increases, leading to successive constructive and destructive interference between the multiple images. BBHs also have spins $\mathbf{S}_i$ that may be misaligned with their orbital angular momentum $\mathbf{L}$. As the BBHs inspiral, these misaligned spins cause $\mathbf{L}$ to precess about the total angular momentum $\mathbf{J}$, modulating the GW emission similar to pulsar emission resulting from a misaligned jet rotating in and out of the line of sight. We investigate the ability of a single L-shaped GW detector to distinguish between these two sources of modulation. We find that precessional modulation can mimic the lensing modulation between two images with comparable magnifications when the time delay between the images is short enough that fewer than three interference fringes occur during the time the GW signal spends in the sensitivity band of the detector. As strong lensing is rare for GW sources at moderate redshift while misaligned spins are common for BBHs produced in certain formation channels, ruling out precessional modulation is essential to identifying genuinely lensed systems.

Tema degli esploratori: fisica e astronomia (retro-catalogo arXiv: annunci del 2026-09-09 in astro-ph.CO).
Categorie arXiv: General Relativity and Quantum Cosmology (gr-qc) ; Cosmology and Nongalactic Astrophysics (astro-ph.CO).
Pagina del lavoro: https://arxiv.org/abs/2609.06347 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-10-16T15:48:46.951Z dalla pagina https://arxiv.org/catchup/astro-ph.CO/2026-09-09?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).