"On Ionization in the Solar Chromosphere"

E255010
astrophysics paper scientific paper

"On Ionization in the Solar Chromosphere" is the seminal 1920 paper by Meghnad Saha that introduced the Saha ionization equation, fundamentally explaining the ionization states of elements in stellar atmospheres.

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All labels observed (2)

Label Occurrences
"On Ionization in the Solar Chromosphere" canonical 2
On Ionization in the Solar Chromosphere 1

Statements (43)

Predicate Object
instanceOf astrophysics paper ⓘ
scientific paper ⓘ
appliesTo gaseous plasmas in thermodynamic equilibrium ⓘ
solar atmosphere ⓘ
stellar atmospheres ⓘ
author Meghnad Saha ⓘ
basedOn Maxwell–Boltzmann statistics ⓘ
mass action law ⓘ
thermodynamic equilibrium ⓘ
citedAs Saha 1920 paper ⓘ
contributedTo physical interpretation of stellar spectral types ⓘ
understanding of temperature dependence of ionization in stars ⓘ
countryOfOrigin India ⓘ
describes ionization in the solar chromosphere ⓘ
ionization states of elements in stellar atmospheres ⓘ
relationship between ionization, temperature, and pressure ⓘ
field astrophysics ⓘ
plasma physics ⓘ
statistical mechanics ⓘ
stellar astrophysics ⓘ
hasImpact interpretation of spectral lines ⓘ
modern astrophysics ⓘ
theory of stellar atmospheres ⓘ
hasTitle "On Ionization in the Solar Chromosphere" self-link ⓘ
surface form: On Ionization in the Solar Chromosphere
historicalSignificance foundational work in astrophysical plasma theory ⓘ
seminal paper in development of quantitative stellar spectroscopy ⓘ
influenced classification of stellar spectra ⓘ
stellar spectroscopy ⓘ
understanding of stellar atmospheres ⓘ
introduces Saha ionization equation ⓘ
language English ⓘ
mainSubject Saha ionization equation ⓘ
ionization equilibrium ⓘ
solar chromosphere ⓘ
notableFor linking laboratory physics with astrophysical observations ⓘ
quantitative treatment of ionization equilibrium in stellar gases ⓘ
partOf early theoretical work on stellar atmospheres ⓘ
publicationYear 1920 ⓘ
timePeriod early 20th century ⓘ
usesConcept Boltzmann distribution ⓘ
surface form: Boltzmann factor

electron pressure ⓘ
ionization potential ⓘ
partition function ⓘ

How these facts were elicited

The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.

Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10.

# Requirements
- If you don't know the subject at all, return an empty list.
- If the subject is not a named entity, return an empty list.
- Include at least one triple where predicate is "instanceOf".
- Do not get too wordy.
- Separate several objects into multiple triples with one object.
Input
Subject: "On Ionization in the Solar Chromosphere"
Description of subject: "On Ionization in the Solar Chromosphere" is the seminal 1920 paper by Meghnad Saha that introduced the Saha ionization equation, fundamentally explaining the ionization states of elements in stellar atmospheres.

Referenced by (3)

Full triples — surface form annotated when it differs from this entity's canonical label.

Meghnad Saha (collaborator and contemporary Indian physicist) → notableWork → "On Ionization in the Solar Chromosphere" ⓘ
subject surface form: Meghnad Saha
Meghnad → notableWork → "On Ionization in the Solar Chromosphere" ⓘ
subject surface form: Meghnad Saha
"On Ionization in the Solar Chromosphere" → hasTitle → "On Ionization in the Solar Chromosphere" self-link ⓘ
subject surface form: On Ionization in the Solar Chromosphere
this entity surface form: On Ionization in the Solar Chromosphere