nova
Let an agent describe novae by designation, type, light curve and visibility, and separate them from supernovae.
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.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent describe novae by designation, type, light curve and visibility, and separate them from supernovae.
A sudden brightening of a star caused by a thermonuclear explosion on the surface of a white dwarf accreting matter from a companion, after which it fades; recurrent novae repeat.
What it is for: Novae reveal binary evolution and produce some elements.
It can be discover and observe it; record light curves; study the binary system; alert observers.
Distinguishing features
Surface explosion on a white dwarf
Star survives
Recurrent in some systems
Different from supernova
What it looks like
A new star appearing for days to months, then fading.
Physical character
brightening: 8-15 magnitudes
decline time: days to months time
How it is recognised
Sudden brightening in a previously faint star
Designations such as Nova Cygni with year
Supernovae are far more energetic
Related models
occurs on - host
is part of - system
is confused with - much larger
is a kind of - category
In practice
Families and kinds
classical novae
recurrent novae
symbiotic novae
fast and slow novae
micronovae
Identifiers
nova designation Nova plus constellation plus year or variable star name names
Standards and regulation
IAU nomenclature
Failure modes and hazards
Confusing with supernovae
Overhyping predicted novae
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Identity Which nova.
Names and systems.
Designation
Name.
Designation
Designation.
- What is its designation? provenance
- When was it discovered? provenance
Type
Classical or recurrent.
Type
Nova type.
- Is it classical or recurrent? definition
- What kind of binary hosts it? definition
Light curve Brightness over time.
Light curves characterise novae.
Peak
Maximum brightness.
Peak
Peak brightness.
- How bright did it get, and when? measurement
- How fast did it fade? measurement
Data
Observations.
Data
Data sources.
- Which observers recorded it? provenance
- Where are data archived? provenance
Physics Why it happens.
Mechanism explains recurrence.
Mechanism
Accretion and ignition.
Mechanism
Mechanism.
- How does the explosion occur? definition
- How often might it recur? measurement
Products
Ejecta.
Products
Ejecta.
- What material does it eject? measurement
- What does it contribute chemically? definition
Observing Seeing it.
Observers want to see novae.
Visibility
Naked eye?
Visibility
Visibility.
- Is it visible to the naked eye, and where? action
- For how long? measurement
Predictions
Expected novae.
Predictions
Predictions.
- Is an eruption predicted, and how reliably? boundary
- Which source? provenance
What the second pass must settle
- Should novae be instances?
- How should light curves be linked?
- How should predictions be communicated?