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Environmental Imprints of Dark Matter and Accretion Disks on Eccentric EMRIs around Kerr Black Holes — arXiv:2609.29770

Source: arXiv (en)
Original: https://arxiv.org/abs/2609.29770
License (as archived): CC0-1.0
Archived: 2026-10-08T08:22:40.964Z
SHA-256 of the archived text: c6f0395981195fbce24ac113d9a2cc6dca055fd9f22131e3e545b831d0a3dda6
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How to cite

Environmental Imprints of Dark Matter and Accretion Disks on Eccentric EMRIs around Kerr Black Holes — arXiv:2609.29770 — arXiv (en), https://arxiv.org/abs/2609.29770 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_13bf6436db99 (Metraipolis archive dc_13bf6436db99, sha256 c6f0395981195fbce24ac113d9a2cc6dca055fd9f22131e3e545b831d0a3dda6)

BibTeX

@misc{dc13bf6436db99,
  title = {Environmental Imprints of Dark Matter and Accretion Disks on Eccentric EMRIs around Kerr Black Holes — arXiv:2609.29770},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2609.29770},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_13bf6436db99; sha256 c6f0395981195fbce24ac113d9a2cc6dca055fd9f22131e3e545b831d0a3dda6},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2609.29770. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

Extreme-mass-ratio inspirals (EMRIs), systems in which a stellar-mass compact object spirals into a supermassive black hole ($M_1$), are prime targets for the space-based gravitational-wave interferometers and are acutely sensitive to their astrophysical environment. We quantify the joint imprint of a dark matter (DM) spike and an accretion disk on the waveforms of eccentric, equatorial Kerr EMRIs, integrating four modular effects---DM dynamical friction, DM self-gravity, Newtonian accretion-disk torques, and disk self-gravity---into a fifth post-Newtonian (5PN) augmented analytic kludge (AAK) waveform model, and assess their measurability via a Fisher-matrix analysis. The DM dynamical-friction dephasing peaks at $M_1\sim 10^6\,M_\odot$, reaching $\sim 10^2$--$10^3\,\mathrm{rad}$; there the DM spike slope is measurable to sub-percent precision and both DM channels are unambiguously detectable, while omitting DM biases the intrinsic parameters significantly. At $M_1\gtrsim 10^8\,M_\odot$ the DM and disk self-gravity channels dominate their dissipative counterparts. The disk parameters remain degenerate across the explored parameter space, since the supersonic regime dominates the inspiral and the subsonic-to-supersonic transition only mildly weakens this degeneracy without lifting it; a combined DM$+$disk analysis further reveals a cross-sector degeneracy between the DM slope and the disk parameters. This physical degeneracy, reflected in the near-singular Fisher matrix, implies that independently measuring the disk parameters requires a relativistic torque model or an electromagnetic counterpart.

Tema degli esploratori: fisica e astronomia (retro-catalogo arXiv: annunci del 2026-09-25 in gr-qc).
Categorie arXiv: General Relativity and Quantum Cosmology (gr-qc) ; Astrophysics of Galaxies (astro-ph.GA).
Pagina del lavoro: https://arxiv.org/abs/2609.29770 — 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 2026-10-08T07:36:52.774Z dalla pagina https://arxiv.org/catchup/gr-qc/2026-09-25?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).