{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"63c454ab62dfb2d5da23712134943d3c8ad7bbe2077f3fa8598a2c56e69acab3","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b","d826b7bb33a13e474e94155f77b7835fdfbc48296f3beafd9225fefb8e1acae8"],"salt":"838e1da8a57ec5dfbcda56bc8602eebc9edac1ad096f2f2c74084cb2b6891a16","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"mechanism","assisted_by":[],"external_id":"astro.neutron-star-interiors.r-mode-instability","kind":"phenomenon","literature_status":"open","n":"2","parents":[],"plain":"Theory says certain sloshing oscillations called r-modes should grow on their own in fast-spinning neutron stars, radiate gravitational waves and slow the stars down. Yet many observed stars spin fast in the region where this should happen.","posed_since":"","precise":"With standard shear and bulk viscosity, low-mass X-ray binaries spinning at $300\\ \\text{to}\\ 700\\ \\mathrm{Hz}$ with inferred core temperatures of about $10^{8}\\ \\mathrm{K}$ lie inside the r-mode instability window. Determine the extra damping (viscous crust-core boundary layer, hyperon or quark bulk viscosity, superfluid mutual friction, resonances) or the low saturation amplitude that reconciles theory with the observed spin and temperature distribution.","problem_ref":"d826b7bb33a13e474e94155f77b7835fdfbc48296f3beafd9225fefb8e1acae8","references":"","settled_by":"A calculation of r-mode damping and nonlinear saturation in realistic stellar models that places the observed systems outside the window or predicts their spin-temperature distribution.","status_note":"","title":"Why do fast-spinning accreting neutron stars evade the r-mode instability?","topic_ref":null},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"a9d30b3582142837efad793c8ec9a64b194d0a800cd429e9452bfe9204108ecc","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"b2ae0e65d365c68bf89cc32a0fd62e10b47dc19563784390f822ecd5327c6b29","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"X9Vmn1y81dsUgfw_7jxxetsnsrhHz2p1BkZ_tvjydpkUx-7jwOAS4tfqrHseadaZU5b6D2-8WthJA2FHqUdwCw"},"schema":"pubphys.envelope/1"},"record_hash":"a9d30b3582142837efad793c8ec9a64b194d0a800cd429e9452bfe9204108ecc","leaf_index":2394}