{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.neutron-star","code":"thing-q4202","url":"https://ver.cy/models/thing/q4202/","name":"neutron star","alternateNames":["Rotating radio transient","The Magnificent Seven","magnetar","soft gamma repeater","pulsar kick","Radio-quiet neutron star","relativistic star","anomalous X-ray pulsar"],"kind":"thing","status":"published","version":"0.2.0-wave.1","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"thing","plane":"PHY","domain":["PHY.SPC"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"An extremely dense compact remnant of a massive star after a supernova, composed mostly of neutrons, about 20 km across with a mass around 1.4 solar masses; pulsars and magnetars are types.","purpose":"Let an agent describe neutron stars by type, mass, radius, magnetic field and observations, separating established facts from open questions.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Compact remnant of neutrons","Extremely dense","Many are pulsars","Interior physics still uncertain"],"structure":{"bundles":[{"id":"identity","name":"Identity","description":"Which object.","layers":[{"id":"designation","name":"Designation","description":"Catalogue name.","findings":[{"id":"designation-finding","name":"Designation","description":"Designation.","questions":[{"text":"Which designation identifies it?","kind":"provenance"},{"text":"What type of neutron star is it?","kind":"definition"}]}]},{"id":"discovery","name":"Discovery","description":"How found.","findings":[{"id":"discovery-finding","name":"Discovery","description":"Discovery.","questions":[{"text":"How and when was it discovered?","kind":"provenance"},{"text":"By which instrument?","kind":"provenance"}]}]}]},{"id":"properties","name":"Properties","description":"Mass, radius, field.","layers":[{"id":"mass-radius","name":"Mass and radius","description":"Constraints.","findings":[{"id":"mass-radius-finding","name":"Mass and radius","description":"Measurements.","questions":[{"text":"What are its mass and radius?","kind":"measurement"},{"text":"How were they measured?","kind":"provenance"}]}]},{"id":"field","name":"Magnetic field and spin","description":"Rotation.","findings":[{"id":"field-finding","name":"Field","description":"Field and spin.","questions":[{"text":"What are its spin period and magnetic field?","kind":"measurement"},{"text":"Is it slowing down?","kind":"measurement"}]}]}]},{"id":"physics","name":"Physics","description":"Interior and mergers.","layers":[{"id":"interior","name":"Interior","description":"Equation of state.","findings":[{"id":"interior-finding","name":"Interior","description":"Interior physics.","questions":[{"text":"What is known about its interior?","kind":"provenance"},{"text":"What remains uncertain?","kind":"boundary"}]}]},{"id":"mergers","name":"Mergers","description":"Gravitational waves.","findings":[{"id":"mergers-finding","name":"Mergers","description":"Merger observations.","questions":[{"text":"Which neutron star mergers have been observed?","kind":"provenance"},{"text":"What did they reveal?","kind":"provenance"}]}]}]},{"id":"observation","name":"Observation","description":"Data.","layers":[{"id":"instruments","name":"Instruments","description":"Radio, X-ray, GW.","findings":[{"id":"instruments-finding","name":"Instruments","description":"Observatories.","questions":[{"text":"Which observatories study it?","kind":"provenance"},{"text":"Where is data published?","kind":"provenance"}]}]},{"id":"communication","name":"Communication","description":"Accuracy.","findings":[{"id":"communication-finding","name":"Communication","description":"Accurate explanation.","questions":[{"text":"Is the explanation accurate and not sensational?","kind":"boundary"},{"text":"Which claims are speculative?","kind":"boundary"}]}]}]}]},"agentConduct":{"may":["Describe neutron stars and report observations from astronomical catalogues.","Explain the physics of neutron stars from established sources."],"mustNot":["Present speculative models of neutron star interiors as settled fact.","Attribute a discovery to a researcher without a source.","Spread claims that a neutron star threatens Earth without evidence."],"requiresHuman":["Announcing a new discovery on behalf of a research team."]},"ethics":{"considerations":["Scientific claims should be accurate and credited to those who made them.","Exaggerated cosmic threats cause needless fear."],"affectedParties":["Researchers","The public who rely on science reporting"]},"owners":{"steward":"Nobody: a natural object; astronomical catalogues keep the authoritative records.","roles":[],"masterSystems":["Astronomical object catalogues and databases"]},"relations":[{"target":"Q368442","type":"parent","note":"registry parent class"},{"target":"compact object","type":"related","note":"remnant"},{"target":"star","type":"related","note":"supernova"},{"target":"pulsar","type":"related","note":"type"},{"target":"black hole","type":"related","note":"another remnant"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.neutron-star","Wikidata: Q4202 (https://www.wikidata.org/wiki/Q4202)","pulsar designation: PSR J plus coordinates catalogues"]},"properties":{"applicability":"required","items":["mass: about 1.1-2.3 solar masses","radius: about 10-13 km","magnetic field: up to about 10^11 tesla - magnetars"]},"recognition":{"applicability":"required","items":["Pulsed radio or X-ray emission","Types such as magnetars and soft gamma repeaters","Gravitational wave events from mergers","Mostly invisible; seen as pulsing radio or X-ray sources."]},"capabilities":{"applicability":"required","items":["observe them as pulsars and X-ray sources","measure masses and radii","detect mergers by gravitational waves","study the equation of state"]},"hazards":{"applicability":"required","items":["Presenting speculative interior models as fact"]},"interfaces":{"applicability":"required","items":["IAU nomenclature"]},"context":{"applicability":"required","items":["Neutron stars test physics under extreme conditions and are sources of gravitational waves.","pulsars","magnetars","X-ray binaries","radio-quiet neutron stars","rotating radio transients"]}},"sources":[{"title":"Wikidata item Q4202: neutron star","url":"https://www.wikidata.org/wiki/Q4202","note":"identity and sense of the item"},{"title":"Wikipedia: Neutron star","url":"https://en.wikipedia.org/wiki/Neutron_star","note":"general description of the item"}],"openQuestions":["Should neutron star types be separate entries?","How should mass and radius constraints be recorded?","How should exotic candidates such as quark stars be marked?"],"resources":{"spec":"/models/things/publications/thing-q4202/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q4202/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-11T06:25:11Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"filled","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-06T19:51:59+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}