Matches in DBpedia 2016-04 for { <http://wikidata.dbpedia.org/resource/Q3802633> ?p ?o }
Showing triples 1 to 11 of
11
with 100 triples per page.
- Q3802633 subject Q6441178.
- Q3802633 abstract "In stellar evolution, an isochrone is a curve on the Hertzsprung-Russell diagram, representing a population of stars of the same age. The Hertzsprung-Russell diagram plots a star’s luminosity against its temperature, or equivalently, its color. Stars change their positions on the HR diagram throughout their life. Newborn stars of low or intermediate mass are born cold but extremely luminous. They contract and dim along the Hayashi track, decreasing in luminosity but staying at roughly the same temperature, until reaching the main sequence directly or by passing through the Henyey track. Stars evolve relatively slowly along the main sequence as they fuse hydrogen, and after the vast majority of their lifespan, all but the least massive stars become giants. They then evolve quickly towards their stellar endpoints: white dwarfs, neutron stars, or black holes.Isochrones can be used to date open clusters because their members all have roughly the same age. If the initial mass function of the open cluster is known, isochrones can be calculated at any age by taking every star in the initial population, using numerical simulations to evolve it forwards to the desired age, and plotting the star’s luminosity and magnitude on the HR diagram. The resulting curve is an isochrone, which can be compared against the observational color-magnitude diagram to determine how well they match. If they match well, the assumed age of the isochrone is close to the actual age of the cluster.".
- Q3802633 wikiPageWikiLink Q11387.
- Q3802633 wikiPageWikiLink Q1194026.
- Q3802633 wikiPageWikiLink Q175876.
- Q3802633 wikiPageWikiLink Q3270143.
- Q3802633 wikiPageWikiLink Q3450.
- Q3802633 wikiPageWikiLink Q504908.
- Q3802633 wikiPageWikiLink Q6441178.
- Q3802633 comment "In stellar evolution, an isochrone is a curve on the Hertzsprung-Russell diagram, representing a population of stars of the same age. The Hertzsprung-Russell diagram plots a star’s luminosity against its temperature, or equivalently, its color. Stars change their positions on the HR diagram throughout their life. Newborn stars of low or intermediate mass are born cold but extremely luminous.".
- Q3802633 label "Stellar isochrone".