dark matter
Let an agent describe dark matter with the evidence for it, the candidate explanations and what remains unknown, without overstating certainty.
Bundle → Layer → Finding → Questions Filled
4 bundles · 8 layers · 8 findings · 16 questions
Evidence Why it is inferred.
Observations
Rotation, lensing, CMB.
Evidence
Lines of evidence.
- Which observations point to dark matter? provenance
- How strong is each line of evidence? measurement
Amount
How much.
Amount
Estimated amount.
- How much dark matter is inferred, from which data? measurement
- How uncertain is the figure? measurement
Nature What it might be.
Candidates
Particles and objects.
Candidates
Candidate explanations.
- Which candidates are considered, and what rules them in or out? definition
- Which are favoured, by whom? provenance
Alternatives
Modified gravity.
Alternatives
Alternative theories.
- How do modified gravity theories explain the evidence? definition
- Where do they fail? boundary
Searches Experiments.
Direct detection
Underground detectors.
Direct searches
Direct detection results.
- What have direct detection experiments found? provenance
- Which limits have they set? measurement
Indirect and collider
Other searches.
Other searches
Other search results.
- What do indirect and collider searches show? provenance
- Are there unconfirmed signals? boundary
Communication Explaining honestly.
Status
Known vs unknown.
Status
What is known.
- What is established and what is unknown? boundary
- How should that be worded? action
Confusion
Dark energy.
Clarification
Common confusions.
- Is dark matter being confused with dark energy? boundary
- How should the difference be explained? action
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.SPC
- Other names and narrower kinds
- cold dark matter, hot dark matter, warm dark matter, baryonic dark matter, light dark matter, scalar field dark matter, weakly interacting massive particle, Meta-cold dark matter, fuzzy cold dark matter
What it is Filled
A hypothesised form of matter that does not emit, absorb or reflect light, inferred from its gravitational effects on galaxies, clusters and the cosmic microwave background, and making up most of the matter in the universe.
Why it exists Filled
Let an agent describe dark matter with the evidence for it, the candidate explanations and what remains unknown, without overstating certainty.
Distinguishing features Filled
- Inferred from gravity, not seen
- Not yet directly detected
- Cold, warm and hot models differ
- Modified gravity is an alternative explanation
What robots and AI may and may not do Filled
Must not
- Present a hypothesis about dark matter as confirmed.
- Dismiss alternative theories without stating the evidence.
- Misattribute observations or discoveries.
Only with a human decision
- Publishing claims of detection.
May
- Explain dark matter evidence and models with cited research.
- State plainly that its nature remains unknown.
Moral aspects Filled
- Public science should be honest about uncertainty.
- Credit for discoveries matters to researchers.
Who is affected
- Researchers
- The public
Owners Filled
Steward
Nobody: a natural phenomenon studied in common.
Links to other meta-models Filled
parent
- Q28732711 - registry parent class
- Q35758 - registry parent class
- Q41872 - registry parent class
related
- galaxy - structure
- curve such as rotation curves - evidence
- astronomy and physics - fields
- dark energy - a different concept
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.dark-matter
- Wikidata: Q79925 (https://www.wikidata.org/wiki/Q79925)
Direct properties required Filled
- share of matter: about 85 percent - of all matter, per standard cosmology
- share of total energy density: about 27 percent
Recognition required Filled
- Galaxy rotation curves flatter than visible matter predicts
- Gravitational lensing maps
- No direct detection so far
- Invisible; mapped indirectly through lensing and galaxy motions.
Capabilities and actions required Filled
- infer it, from gravitational effects
- search for it, in direct detection and collider experiments
- model it, in cosmological simulations
- test alternatives, such as modified gravity
Hazards and failure modes required Filled
- Presenting dark matter as directly observed
- Presenting speculative candidates as established
- Confusing dark matter and dark energy
Standards and interfaces not applicable Not applicable
Not applicable
No established standard, law or official classification directly regulates dark matter as a hypothesized physical constituent of the universe.
Context of use required Filled
- Explaining galaxy rotation, gravitational lensing and cosmic structure.
- cold dark matter
- warm and hot dark matter
- candidates: WIMPs, axions, primordial black holes
- baryonic dark matter (largely excluded as main component)
Sources Filled
- Wikidata item Q79925: dark matter - identity and sense of the item
- Wikipedia: Dark matter - general description of the item
Open questions
- How should the registry mark hypothesised entities?
- Should candidates be separate entries?
- How should alternative theories be represented fairly?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q79925/spec.json