{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.sx-arietis-variable","code":"thing-q1392904","url":"https://ver.cy/models/thing/q1392904/","name":"SX Arietis variable","alternateNames":[],"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":"A class of rotating variable stars, mainly hot main-sequence stars of spectral types B0 to B9 with strong magnetic fields, whose brightness and spectral line strengths vary with rotation as chemically peculiar surface regions rotate in and out of view, with periods of about one day; the prototype is SX Arietis and they are the hotter analogues of alpha2 Canum Venaticorum variables.","purpose":"Let an agent explain SX Arietis variables by mechanism, properties and relation to other magnetic variables, and support observation and data access.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Rotational modulation","Strong magnetic fields","Hot B-type stars","Chemically peculiar surfaces"],"structure":{"bundles":[{"id":"mechanism","name":"Mechanism","description":"Why they vary.","layers":[{"id":"rotation","name":"Rotation","description":"Rotational modulation.","findings":[{"id":"rotation-finding","name":"Rotation","description":"Rotational modulation.","questions":[{"text":"How do chemically peculiar regions and rotation produce the variability?","kind":"definition"},{"text":"What is the rotation period?","kind":"measurement"}]}]},{"id":"magnetic","name":"Magnetic","description":"Magnetic fields.","findings":[{"id":"magnetic-finding","name":"Magnetic","description":"Magnetic fields.","questions":[{"text":"How strong are the magnetic fields, and how are they measured?","kind":"measurement"},{"text":"How do they shape the surface abundances?","kind":"definition"}]}]}]},{"id":"properties","name":"Properties","description":"What they are.","layers":[{"id":"star","name":"Star","description":"Stellar properties.","findings":[{"id":"star-finding","name":"Star","description":"Stellar properties.","questions":[{"text":"What are the spectral type, temperature and peculiarities of this star?","kind":"provenance"},{"text":"How large is the amplitude?","kind":"measurement"}]}]},{"id":"classify","name":"Classify","description":"Classification.","findings":[{"id":"classify-finding","name":"Classify","description":"Classification.","questions":[{"text":"Is the star an SX Arietis or alpha2 CVn variable, and which criteria decide?","kind":"definition"},{"text":"Which catalogue records it?","kind":"provenance"}]}]}]},{"id":"science","name":"Science","description":"Wider relevance.","layers":[{"id":"evolution","name":"Evolution","description":"Origins of fields.","findings":[{"id":"evolution-finding","name":"Evolution","description":"Origins of fields.","questions":[{"text":"Where do the magnetic fields of these stars come from, according to current theories?","kind":"provenance"},{"text":"How do they evolve?","kind":"provenance"}]}]},{"id":"compare","name":"Compare","description":"Other rotating variables.","findings":[{"id":"compare-finding","name":"Compare","description":"Comparison.","questions":[{"text":"How do SX Arietis stars compare with BY Draconis and alpha2 CVn stars?","kind":"definition"},{"text":"What do they have in common?","kind":"definition"}]}]}]},{"id":"observing","name":"Observing","description":"Data.","layers":[{"id":"data","name":"Data","description":"Light curves.","findings":[{"id":"data-finding","name":"Data","description":"Light curves.","questions":[{"text":"Where can light curves and spectra for this star be found?","kind":"provenance"},{"text":"Which surveys observe it?","kind":"provenance"}]}]},{"id":"amateur","name":"Amateur","description":"Observing.","findings":[{"id":"amateur-finding","name":"Amateur","description":"Amateur observing.","questions":[{"text":"Can amateurs detect the small variations with photometry?","kind":"boundary"},{"text":"How can observations be reported?","kind":"action"}]}]}]}]},"agentConduct":{"may":["Describe SX Arietis variables and list known members from catalogues.","Process photometric data the agent is authorized to analyse."],"mustNot":["Misclassify a star in a catalogue without evidence.","Publish other observers' data without credit."],"requiresHuman":["Submitting a new classification to a variable star catalogue."]},"ethics":{"considerations":["Astronomy relies on shared data and fair credit, including amateur observers.","Catalogue errors persist and mislead later work."],"affectedParties":["Researchers","Amateur observers"]},"owners":{"steward":"Nobody owns the stars; variable star catalogues record them.","roles":[],"masterSystems":["General Catalogue of Variable Stars","Astronomical object databases"]},"relations":[{"target":"Q2168098","type":"parent","note":"registry parent class"},{"target":"rotating variable star","type":"related","note":"category"},{"target":"SX Arietis","type":"related","note":"prototype"},{"target":"BY Draconis variable","type":"related","note":"other rotating variable"},{"target":"W Virginis variable","type":"related","note":"other variable class"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.sx-arietis-variable","Wikidata: Q1392904 (https://www.wikidata.org/wiki/Q1392904)","GCVS type: SXARI variable star type"]},"properties":{"applicability":"required","items":["Rotation period:  day - Recurring brightness or spectral variations provide an estimate of the rotation period, commonly on the order of a day.","Effective temperature:  K - Effective temperature is inferred by comparing observed spectra and flux distributions with stellar atmosphere models.","Mean longitudinal magnetic field:  gauss - Spectropolarimetry estimates the visible surface average of the magnetic field component along the line of sight."]},"recognition":{"applicability":"required","items":["B-type stars with helium or silicon peculiarities","Periods near one day","BY Draconis variables are cool spotted stars","Hot blue stars with small periodic brightness variations."]},"capabilities":{"applicability":"required","items":["describe the rotational modulation mechanism","identify SX Arietis star properties","relate them to alpha2 CVn and BY Draconis stars","find light curves and catalogues"]},"hazards":{"applicability":"required","items":["Confusing rotational and pulsational variability","Misclassifying as eclipsing binaries"]},"interfaces":{"applicability":"required","items":["General Catalogue of Variable Stars classification"]},"context":{"applicability":"required","items":["Stellar astrophysics and variable star observing.","helium-strong SX Arietis stars","helium-weak variants","related alpha2 CVn variables (cooler)"]}},"sources":[{"title":"Wikidata item Q1392904: SX Arietis variable","url":"https://www.wikidata.org/wiki/Q1392904","note":"identity and sense of the item"},{"title":"Wikipedia: SX Arietis variable","url":"https://en.wikipedia.org/wiki/SX_Arietis_variable","note":"general description of the item"}],"openQuestions":["Should alpha2 CVn variables be linked or merged?","How should magnetic field data be linked?","How should survey data be linked?"],"resources":{"spec":"/models/things/publications/thing-q1392904/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q1392904/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-11T15:39:38Z","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 2026-10-07T10:10:26+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}