{"paper":{"title":"Massive boson stars: Stability and GW emission in head-on mergers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"Quartically self-interacting massive boson stars remain stable only up to the first maximum on their mass curve, and equal-mass head-on collisions produce one of three outcomes depending on compactness.","cross_cats":["astro-ph.HE"],"primary_cat":"gr-qc","authors_text":"Bo-Xuan Ge","submitted_at":"2025-12-17T09:42:37Z","abstract_excerpt":"We investigate quartically self-interacting massive boson stars by constructing equilibrium sequences and performing dynamical evolutions. The mass curve $M(|\\phi_c|)$ along these sequences develops multiple extrema, yet stability changes only at the first maximum; configurations beyond it become highly compact and collapse under numerically induced perturbations, with near-critical models displaying a short-lived double-dive behaviour. Head-on collisions of equal-mass stars yield three distinct outcomes -- boson star remnants, black hole formation at contact, and collapse of each star to a bl"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"Head-on collisions of equal-mass stars yield three distinct outcomes -- boson star remnants, black hole formation at contact, and collapse of each star to a black hole prior to contact. The associated gravitational-wave energies reflect a competition between increasing compactness, which enhances the efficiency of gravitational-wave emission, and decreasing tidal deformability, which suppresses merger asymmetries.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"Stability changes only at the first maximum of the mass curve M(|φ_c|); configurations beyond it become highly compact and collapse under numerically induced perturbations.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Numerical evolutions of quartically self-interacting boson stars reveal three merger outcomes and a non-monotonic gravitational-wave energy pattern driven by the competition between compactness and tidal deformability.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Quartically self-interacting massive boson stars remain stable only up to the first maximum on their mass curve, and equal-mass head-on collisions produce one of three outcomes depending on compactness.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"52682ef10e80fe1de7ba91963f2ae68ba5aad6e94ea1bf8d246ca93aeb8e5955"},"source":{"id":"2512.15242","kind":"arxiv","version":4},"verdict":{"id":"b121d306-9f73-4d82-ae29-d9a32a1cdbc9","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-16T22:08:31.164473Z","strongest_claim":"Head-on collisions of equal-mass stars yield three distinct outcomes -- boson star remnants, black hole formation at contact, and collapse of each star to a black hole prior to contact. The associated gravitational-wave energies reflect a competition between increasing compactness, which enhances the efficiency of gravitational-wave emission, and decreasing tidal deformability, which suppresses merger asymmetries.","one_line_summary":"Numerical evolutions of quartically self-interacting boson stars reveal three merger outcomes and a non-monotonic gravitational-wave energy pattern driven by the competition between compactness and tidal deformability.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"Stability changes only at the first maximum of the mass curve M(|φ_c|); configurations beyond it become highly compact and collapse under numerically induced perturbations.","pith_extraction_headline":"Quartically self-interacting massive boson stars remain stable only up to the first maximum on their mass curve, and equal-mass head-on collisions produce one of three outcomes depending on compactness."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2512.15242/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":2,"snapshot_sha256":"ef9e4051d9966fd1bd129fc943dab037572821cfef6246988c3c8094c9287b20"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}