sub-brown dwarf
Let an agent explain sub-brown dwarfs by definition, formation, detection and relationship to brown dwarfs and rogue planets, with attributed classification schemes.
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 → Questions Filled
4 bundles · 8 layers · 8 findings · 16 questions
Definition What counts.
Mass
Mass limit.
Mass
Mass limit.
- What mass limit separates sub-brown dwarfs from brown dwarfs? measurement
- Why is deuterium burning used? definition
Formation
Origin criterion.
Formation
Formation criterion.
- Do classification schemes use formation or mass as the main criterion, according to the IAU and authors? provenance
- How can formation be inferred? definition
Detection Finding them.
Methods
Infrared surveys.
Methods
Detection methods.
- How are these objects found, such as in infrared surveys or by microlensing? definition
- Which telescopes are used? provenance
Mass estimate
Uncertainty.
Mass estimate
Mass estimates.
- How is the mass estimated, and how uncertain is it? measurement
- Does age matter? definition
Examples Candidates.
Candidates
Known objects.
Candidates
Candidates.
- Which objects have been proposed as sub-brown dwarfs, and by whom? provenance
- Are the classifications disputed? boundary
Catalogues
Databases.
Catalogues
Catalogues.
- Which catalogues list planetary-mass objects? provenance
- How are they labelled there? definition
Learning Explaining.
Explain
Plain language.
Explain
Plain explanation.
- How can the difference between stars, brown dwarfs and planets be explained simply? action
- Which caveats apply? boundary
Rogue planets
Related objects.
Rogue planets
Rogue planets.
- How do rogue planets ejected from systems differ from objects formed alone? definition
- Can they be told apart observationally? boundary
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.SPC
What it is Filled
A substellar object of planetary mass, below the deuterium-burning limit of about 13 Jupiter masses, that formed by the collapse of a gas cloud like a star rather than in a disc around a star; the term is used in some classifications for free-floating planetary-mass objects, and usage varies.
Why it exists Filled
Let an agent explain sub-brown dwarfs by definition, formation, detection and relationship to brown dwarfs and rogue planets, with attributed classification schemes.
Distinguishing features Filled
- Below about 13 Jupiter masses
- Formed like stars
- Often free-floating
- Classification debated
What robots and AI may and may not do Filled
Must not
- Present a candidate object as confirmed without peer-reviewed evidence.
- Blur the terminology of sub-brown dwarfs and rogue planets without noting the debate.
- Credit a discovery to the wrong team.
Only with a human decision
- Announcing a new discovery or classification publicly.
May
- Describe sub-brown dwarfs and how they are distinguished from planets, citing astronomical sources.
- Report catalogued objects with their measured properties and uncertainties.
Moral aspects Filled
- Contested definitions in astronomy need honest presentation to the public.
- Credit for discoveries matters to researchers' careers.
Who is affected
- Astronomers
- Students and the public
Owners Filled
Steward
Nobody owns them; astronomical catalogues record known objects.
Master systems
- Astronomical object catalogues
Links to other meta-models Filled
parent
- Q3132741 - registry parent class
related
- substellar object - category
- brown dwarf - related class
- rogue planet - overlapping class
- infrared astronomy - method
What else AI and robots need to interact with it Incomplete
Identity and identifiers required Filled
- Vercy registry: vr.tr.sub-brown-dwarf
- Wikidata: Q1073768 (https://www.wikidata.org/wiki/Q1073768)
Direct properties required Missing, in the backlog
Not described yet. This gap is in the card backlog.
Recognition required Filled
- Planetary masses without a host star
- Infrared detections in star-forming regions
- Brown dwarfs are above the deuterium-burning limit
- Very faint, cool objects seen mainly in infrared images.
Capabilities and actions required Filled
- explain the definition and mass limits
- distinguish sub-brown dwarfs, brown dwarfs and planets
- describe detection methods
- find catalogues of candidates
Hazards and failure modes required Filled
- Presenting a debated term as settled
- Uncertain mass estimates
Standards and interfaces required Filled
- IAU working definitions of planets and substellar objects
Context of use required Filled
- Classifying substellar objects in astronomy.
- free-floating planetary-mass objects
- planetary-mass companions to brown dwarfs
- young objects in star-forming regions
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 rogue planets be merged with this entry?
- How should candidate lists be linked?
- How should competing definitions be recorded?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q1073768/spec.json