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Research draft

Delta Scuti variable

vr.tr.delta-scuti-variable · thing-q836976

Let an agent describe Delta Scuti variables by star, periods, amplitude and asteroseismology, with sourced data.

Thing Registry Physical world and living systems PHY.SPC

Research draft, second pass

A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.

Researched by: Claude

Bundle → Layer → Finding → QuestionsClassifiersWhat it isWhy it existsDistinguishing featuresWhat robots and AI may and may not doMoral aspectsOwnersLinks to other meta-modelsIdentity and identifiersDirect propertiesRecognitionCapabilities and actionsHazards and failure modesStandards and interfacesContext of useSources

Bundle → Layer → Finding → Questions Filled

4 bundles · 8 layers · 8 findings · 16 questions

Identity Which star.

Designation

Name.

Designation

Designation.

  1. Which star is meant, and what is its variable type? provenance
  2. Which catalogue classifies it? provenance

Type

Spectral type.

Type

Spectral type.

  1. What is its spectral type and luminosity class? provenance
  2. How far away is it? measurement
Variability Light curve.

Periods

Frequencies.

Periods

Periods.

  1. What pulsation periods are detected? measurement
  2. From which survey data? provenance

Amplitude

Range.

Amplitude

Amplitude.

  1. What is the amplitude of variation? measurement
  2. Is it low or high amplitude? definition
Science Asteroseismology.

Modes

Identification.

Modes

Pulsation modes.

  1. Which modes have been identified, according to studies? provenance
  2. How certain are they? boundary

Interior

Structure.

Interior

Interior structure.

  1. What do the pulsations reveal about the interior? provenance
  2. Which models are used? provenance
Observing Contributing.

Equipment

Photometry.

Equipment

Equipment.

  1. What equipment is needed to detect the variation? definition
  2. Is time-series photometry required? boundary

Submit

Databases.

Submit

Submitting data.

  1. How can observations be submitted to variable star databases? action
  2. Which organisation runs them? provenance

Classifiers Filled

Family
Thing Registry
Category
Physical world and living systems
Entry kind
thing
Plane
PHY
Domain
PHY.SPC
Also called
SX Phoenicis variable, AI Velorum variable, low amplitude Delta Scuti variable

What it is Filled

A pulsating variable star of spectral type A or F near the main sequence, varying in brightness with periods of about 0.02 to 0.25 days through radial and non-radial pulsations; SX Phoenicis stars are a related metal-poor group.

Why it exists Filled

Let an agent describe Delta Scuti variables by star, periods, amplitude and asteroseismology, with sourced data.

Distinguishing features Filled

  • Short-period pulsation
  • Multiple pulsation modes
  • Near the main sequence
  • Used in asteroseismology

What robots and AI may and may not do Filled

Must not

  • Classify a star as a Delta Scuti variable without the evidence the classification needs.
  • Present noisy or uncertain frequencies as firm results.
  • Use other observers' data without crediting them.

Only with a human decision

  • Submitting new variable star classifications to a catalogue.

May

  • Report periods, amplitudes and classification of Delta Scuti variables from catalogues, citing them.
  • Analyse public light curves to find pulsation frequencies.

Moral aspects Filled

  • Amateur observers contribute much of the data; their work deserves credit.
  • Errors in catalogues propagate into later research.

Who is affected

  • Professional and amateur astronomers
  • Users of catalogues

Owners Filled

Steward

Nobody: natural objects in space; variable star catalogues record them.

Master systems

  • Variable star catalogues

Links to other meta-models Filled

parent

  • Q353834 - registry parent class

related

  • pulsating variable star - category
  • Delta Scuti - prototype
  • asteroseismology - field
  • GCVS and VSX - catalogues

What else AI and robots need to interact with it Filled

Identity and identifiers required Filled

  • Vercy registry: vr.tr.delta-scuti-variable
  • Wikidata: Q836976 (https://www.wikidata.org/wiki/Q836976)
  • GCVS type: DSCT variable star type

Direct properties required Filled

  • period: about 0.02-0.25 days
  • amplitude: up to about 0.9 magnitudes - most much smaller

Recognition required Filled

  • Spectral types A to F
  • Periods of hours
  • RR Lyrae stars have longer periods and larger amplitudes
  • White or yellow-white stars with small, rapid brightness changes.

Capabilities and actions required Filled

  • look up periods and amplitudes
  • explain asteroseismology in general terms
  • find photometric data from surveys
  • distinguish related classes

Hazards and failure modes required Filled

  • Misclassification with similar pulsators
  • Overinterpreting mode identifications

Standards and interfaces required Filled

  • IAU variable star nomenclature

Context of use required Filled

  • Asteroseismology and understanding stellar interiors.
  • low-amplitude Delta Scuti stars
  • high-amplitude Delta Scuti stars
  • SX Phoenicis variables

Sources Missing, in the backlog

Not described yet. This gap is in the card backlog.

Note: Written from model knowledge without web access; claims are unverified.

Open questions

  • Should SX Phoenicis stars be a separate entry?
  • How should survey light curves be linked?
  • How should mode identifications be recorded?

Machine files

Card as JSON Specification Card backlog vercy.card/1

Provenance

thing registry research (pass 2) · unreviewed

Built from: models/things/publications/thing-q836976/spec.json