pith:OXUBNE55
Excitation factors for horizonless compact objects: long-lived modes, echoes, and greybody factors
Long-lived modes in horizonless ultracompact objects have excitation factors that scale with their tiny imaginary frequency, suppressing early contributions and confining them to very late echoes.
arxiv:2511.08692 v2 · 2025-11-11 · gr-qc · astro-ph.HE · hep-ph
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Claims
We show that the excitation of such modes is strongly suppressed, scaling with the imaginary part of their frequency, and therefore they contribute to the waveform only at very late times.
The effective cavity between the photon sphere and the object's interior produces long-lived modes whose excitation factors can be computed analytically and numerically and scale directly with the imaginary frequency part.
Excitation factors of long-lived quasinormal modes in horizonless compact objects scale with their small imaginary frequency, suppressing early contributions and producing a hierarchy where prompt ringdown uses ordinary modes and late echoes use cavity modes.
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| First computed | 2026-05-18T02:44:32.946282Z |
|---|---|
| Builder | pith-number-builder-2026-05-17-v1 |
| Signature | Pith Ed25519
(pith-v1-2026-05) · public key |
| Schema | pith-number/v1.0 |
Canonical hash
75e81693bd209babd6acfb9a7bb46673e4369527d852a467a3cd1cad359a5018
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curl -sH 'Accept: application/ld+json' https://pith.science/pith/OXUBNE55ECN2XVVM7ONHXNDGOP \
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Canonical record JSON
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