T Tauri-type star
Let an agent describe T Tauri stars by properties, variability, disks and observation, with sourced data.
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 T Tauri stars by properties, variability, disks and observation, with sourced data.
A young, variable pre-main-sequence star of low mass, typically under about 10 million years old, still contracting and often surrounded by a protoplanetary disk; named after the prototype T Tauri.
What it is for: Studying star and planet formation.
It can be identify T Tauri stars and subtypes; explain their variability; relate them to protoplanetary disks; find observational data.
Distinguishing features
Pre-main-sequence
Variable brightness
Accretion and disks
Strong magnetic activity
What it looks like
Irregularly varying young stars in star-forming regions, often with infrared excess.
Physical character
mass: under about 2 solar masses
age: under about 10 million years
How it is recognised
Emission lines and irregular variability
Found near molecular clouds
Herbig Ae/Be stars are more massive young stars
Related models
is a kind of - category
is surrounded by - structure
evolves from - earlier stage
is contrasted with - related class
In practice
Families and kinds
classical T Tauri stars
weak-lined T Tauri stars
FU Orionis outbursts (related)
Identifiers
GCVS type INT and related variable star type
Standards and regulation
IAU variable star nomenclature
Failure modes and hazards
Misclassification of young stars
Overinterpreting variability
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.
Star Which star.
Catalogues identify.
Identity
Designation.
Identity
Designation.
- Which T Tauri star is meant, and in which region? provenance
- Is it classical or weak-lined? definition
Age
Estimate.
Age
Age.
- What is its estimated age and mass? measurement
- Which models were used? provenance
Variability Light changes.
Variability has causes.
Causes
Accretion and spots.
Causes
Causes of variability.
- What causes its brightness changes, according to studies? provenance
- Over what timescales? measurement
Outbursts
Accretion events.
Outbursts
Outbursts.
- Has it shown accretion outbursts? provenance
- Which observations recorded them? provenance
Disks Planet formation.
Disks may form planets.
Disk
Protoplanetary disk.
Disk
Disk.
- Does it have a detected protoplanetary disk? provenance
- What structure is seen? provenance
Jets
Outflows.
Jets
Jets.
- Does it drive jets or outflows? provenance
- How were they observed? provenance
Observing Contributing.
Observers contribute.
Visibility
Equipment.
Visibility
Visibility.
- Can it be observed with amateur equipment? boundary
- When is it best placed? measurement
Submit
Databases.
Submit
Submitting data.
- How can photometry be submitted to variable star databases? action
- Which organisation collects it? provenance
What the second pass must settle
- Should subtypes be separate entries?
- How should survey data be linked?
- How should disk data be linked?