{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.be-x-ray-binaries","code":"thing-q4875616","url":"https://ver.cy/models/thing/q4875616/","name":"Be X-ray binaries","alternateNames":[],"kind":"thing","status":"published","version":"0.2.0-wave.2","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"thing","plane":"PHY","domain":["PHY.SPC"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"A class of high-mass X-ray binaries consisting of a neutron star orbiting a Be star, a rapidly rotating B-type star with a circumstellar decretion disc; the neutron star accretes from the disc, often in outbursts near periastron, making Be X-ray binaries the most numerous class of high-mass X-ray binaries and important laboratories for accretion and neutron star physics.","purpose":"Let an agent explain Be X-ray binaries, their components and outburst behaviour, and their significance, with sourced data and attribution.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["The donor is a Be star.","The accretor is a neutron star.","Transient outbursts are characteristic behaviour.","Eccentric orbits are characteristic of the class."],"structure":{"bundles":[{"id":"system","name":"System","description":"Components.","layers":[{"id":"components","name":"Components","description":"What is in the system.","findings":[{"id":"components-finding","name":"Components","description":"Components.","questions":[{"text":"What are the components and orbit of this Be X-ray binary?","kind":"provenance"},{"text":"How does the Be star decretion disc feed accretion?","kind":"definition"}]}]},{"id":"terms","name":"Terms","description":"Be versus B[e].","findings":[{"id":"terms-finding","name":"Terms","description":"Terms.","questions":[{"text":"How do Be stars differ from B[e] stars?","kind":"definition"},{"text":"Which entry fits?","kind":"action"}]}]}]},{"id":"outbursts","name":"Outbursts","description":"Variability.","layers":[{"id":"types","name":"Types","description":"Type I and II.","findings":[{"id":"types-finding","name":"Types","description":"Outburst types.","questions":[{"text":"What distinguishes Type I and Type II outbursts, and what triggers them, according to models?","kind":"provenance"},{"text":"How are they linked to the orbit?","kind":"definition"}]}]},{"id":"monitoring","name":"Monitoring","description":"X-ray monitoring.","findings":[{"id":"monitoring-finding","name":"Monitoring","description":"Monitoring.","questions":[{"text":"Which X-ray monitors track outbursts, and where are alerts published?","kind":"provenance"},{"text":"What is the current state of this source?","kind":"provenance"}]}]}]},{"id":"physics","name":"Physics","description":"What they teach.","layers":[{"id":"neutron","name":"Neutron","description":"Neutron star physics.","findings":[{"id":"neutron-finding","name":"Neutron","description":"Neutron star physics.","questions":[{"text":"What do Be X-ray binaries reveal about neutron star spin, magnetic fields and accretion?","kind":"provenance"},{"text":"Which measurements are key?","kind":"provenance"}]}]},{"id":"evolution","name":"Evolution","description":"Formation.","findings":[{"id":"evolution-finding","name":"Evolution","description":"Formation.","questions":[{"text":"How do Be X-ray binaries form, and what do they imply for supernova kicks?","kind":"provenance"},{"text":"Why are they numerous in the Small Magellanic Cloud?","kind":"provenance"}]}]}]},{"id":"learn","name":"Learn","description":"Resources.","layers":[{"id":"catalogues","name":"Catalogues","description":"Known systems.","findings":[{"id":"catalogues-finding","name":"Catalogues","description":"Catalogues.","questions":[{"text":"Which catalogues list Be X-ray binaries?","kind":"provenance"},{"text":"Which systems are best studied?","kind":"provenance"}]}]},{"id":"explain","name":"Explain","description":"Plain language.","findings":[{"id":"explain-finding","name":"Explain","description":"Plain explanation.","questions":[{"text":"How can Be X-ray binaries be explained simply and accurately?","kind":"action"},{"text":"Which caveats apply?","kind":"boundary"}]}]}]}]},"agentConduct":{"may":["Explain Be X-ray binaries, their components and outburst behaviour, citing research.","Report catalogued systems with their sources."],"mustNot":["Present the nature of the compact object as known when it is uncertain.","Invent orbital or physical parameters for systems not measured.","Misattribute observations to the wrong instruments or teams."],"requiresHuman":["Publishing a new classification of a system."]},"ethics":{"considerations":["Careful attribution and uncertainty make astronomical catalogues trustworthy."],"affectedParties":["Astronomers","Students and readers"]},"owners":{"steward":"Nobody owns the systems; astronomical catalogues record them.","roles":[],"masterSystems":["Astronomical object databases"]},"relations":[{"target":"Q845169","type":"parent","note":"registry parent class"},{"target":"high-mass X-ray binary","type":"related","note":"category"},{"target":"neutron star","type":"contains","note":"accretor"},{"target":"B[e]-type star","type":"related","note":"distinct class of B star"},{"target":"super soft X-ray source","type":"related","note":"other X-ray class"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.be-x-ray-binaries","Wikidata: Q4875616 (https://www.wikidata.org/wiki/Q4875616)"]},"properties":{"applicability":"required","items":["Orbital period:  day - The period is inferred from repeated orbital signatures in pulse timing, radial velocities or long-term light curves.","X-ray luminosity:  W - Luminosity is estimated from measured X-ray flux and distance with a stated energy band and absorption correction.","Neutron star spin period:  s - The spin period is measured from recurring X-ray pulsations when these are detectable.","Orbital eccentricity:  dimensionless - Eccentricity is estimated by fitting an orbital model to timing or spectroscopic observations."]},"recognition":{"applicability":"required","items":["Be star with emission lines and infrared excess","Periodic or giant X-ray outbursts","B[e] stars are a different class","Not visible as such; transient X-ray sources with optical Be star counterparts."]},"capabilities":{"applicability":"required","items":["explain the system components and geometry","describe outburst types and mechanisms","relate them to Be stars and neutron star physics","find catalogues and monitoring data"]},"hazards":{"applicability":"required","items":["Confusing Be and B[e] stars","Presenting outburst models as settled"]},"interfaces":{"applicability":"required","items":["No regulation"]},"context":{"applicability":"required","items":["High-energy astrophysics and stellar evolution.","persistent Be X-ray binaries","transient Be X-ray binaries with Type I outbursts","systems with giant Type II outbursts","Be X-ray binaries in the Magellanic Clouds","Be black hole binaries (rare)"]}},"sources":[{"title":"Wikidata item Q4875616: Be X-ray binaries","url":"https://www.wikidata.org/wiki/Q4875616","note":"identity and sense of the item"},{"title":"Wikipedia: Be/X-ray binary","url":"https://en.wikipedia.org/wiki/Be/X-ray_binary","note":"general description of the item"}],"openQuestions":["Should each notable system be a separate entry?","How should monitoring data be linked?","How should outburst models be attributed?"],"resources":{"spec":"/models/things/publications/thing-q4875616/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q4875616/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-11T20:12:02Z","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 2026-10-07T12:16:33+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}