Chabrier initial mass function
E884523
The Chabrier initial mass function is a widely used model in astrophysics that describes the distribution of stellar masses at birth, particularly improving the representation of low-mass stars compared to earlier formulations.
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
initial mass function
ⓘ
stellar population model ⓘ |
| appliesTo |
stars in the Milky Way disk
ⓘ
stellar populations ⓘ |
| assumes |
single-star initial mass distribution
ⓘ
universal IMF for many applications ⓘ |
| assumesEnvironment | Milky Way disk conditions ⓘ |
| basedOn |
mass-luminosity relations for low-mass stars
ⓘ
observed luminosity functions of nearby stars ⓘ |
| betterRepresents | low-mass star counts in the Galactic disk ⓘ |
| comparedTo | Salpeter initial mass function NERFINISHED ⓘ |
| contrastsWith |
bottom-heavy initial mass functions
ⓘ
top-heavy initial mass functions ⓘ |
| describes | distribution of stellar masses at birth ⓘ |
| field |
astrophysics
ⓘ
galaxy evolution ⓘ stellar astrophysics ⓘ |
| focusesOn | low-mass stars ⓘ |
| hasComponent |
log-normal distribution at low stellar masses
ⓘ
power-law distribution at higher stellar masses ⓘ |
| improvesUpon | Salpeter initial mass function NERFINISHED ⓘ |
| influences |
derived stellar masses from photometry
ⓘ
estimates of cosmic stellar mass density ⓘ stellar mass functions inferred from surveys ⓘ supernova rate predictions in population models ⓘ |
| isStandardChoiceIn |
many galaxy stellar mass studies
ⓘ
modern stellar population synthesis codes ⓘ |
| massRange | sub-solar to several solar masses ⓘ |
| mathematicalForm | log-normal plus power-law function of stellar mass ⓘ |
| namedAfter | Gilles Chabrier NERFINISHED ⓘ |
| normalization | set to match local stellar mass density ⓘ |
| parameterizes | number of stars per unit mass interval at birth ⓘ |
| publication | Chabrier 2003 PASP paper on Galactic stellar and substellar mass function ⓘ |
| relatedTo | Kroupa initial mass function NERFINISHED ⓘ |
| usedFor |
cosmological simulations of galaxy formation
ⓘ
estimating stellar mass content of galaxies ⓘ estimating stellar mass-to-light ratios ⓘ interpreting galaxy luminosities ⓘ modeling stellar populations in galaxies ⓘ population synthesis modeling ⓘ |
| usedIn |
chemical evolution models of galaxies
ⓘ
extragalactic astronomy ⓘ star formation studies ⓘ |
| yearProposed | 2003 ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.