Hertzsprung–Russell diagram
E61028
The Hertzsprung–Russell diagram is a fundamental astronomical chart that plots stars’ luminosities against their temperatures or spectral types, revealing key patterns of stellar evolution and classification.
Aliases (3)
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical diagram
→
stellar classification tool → |
| axisOrientation |
luminosity increases upward on the y-axis
→
temperature decreases to the right on the x-axis → |
| centralConceptIn |
stellar astrophysics
→
|
| displaysFeature |
asymptotic giant branch
→
horizontal branch → instability strip → main sequence → red giant branch → subgiant branch → supergiant region → white dwarf sequence → |
| field |
astronomy
→
astrophysics → |
| hasVariant |
observational Hertzsprung–Russell diagram
→
theoretical Hertzsprung–Russell diagram → |
| helpsDetermine |
age of star clusters
→
cluster turnoff point → evolutionary stage of a star → |
| historicalDevelopmentPeriod |
early 20th century
→
|
| namedAfter |
Ejnar Hertzsprung
→
Henry Norris Russell → |
| observationalVersionPlots |
color index versus absolute magnitude
→
|
| plots |
stellar absolute magnitude
→
stellar effective temperature → stellar luminosity → stellar spectral type → |
| relatedTo |
Morgan–Keenan classification
→
color–magnitude diagram → spectral classification → |
| showsCorrelationBetween |
stellar color and luminosity
→
stellar luminosity and temperature → stellar mass and position on main sequence → |
| theoreticalVersionPlots |
effective temperature versus luminosity
→
|
| usedFor |
inferring stellar ages
→
inferring stellar masses → inferring stellar radii → stellar classification → study of stellar evolution → visualizing stellar populations → |
| usedIn |
galactic stellar population analysis
→
globular cluster studies → open cluster studies → stellar evolution modeling → |
| visualizationType |
two-dimensional scatter plot
→
|
| xAxisRepresents |
stellar color index
→
stellar effective temperature → stellar spectral type → |
| yAxisRepresents |
stellar absolute magnitude
→
stellar luminosity → |
Referenced by (6)
| Subject (surface form when different) | Predicate |
|---|---|
|
Henry Norris Russell
→
|
coDeveloperOf |
|
Hertzsprung–Russell diagram
("red giant branch")
→
|
displaysFeature |
|
Hertzsprung–Russell diagram
("observational Hertzsprung–Russell diagram")
→
|
hasVariant |
|
Henry Norris Russell
→
|
knownFor |
|
Hertzsprung–Russell diagram
("color–magnitude diagram")
→
|
relatedTo |
|
The Lives of the Stars
→
|
subject |