About: G-dwarf problem     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : owl:Thing, within Data Space : dbpedia.demo.openlinksw.com associated with source document(s)
QRcode icon
http://dbpedia.demo.openlinksw.com/c/7J7S7CJ3ig

In astronomy, the G-dwarf problem refers to the apparent discrepancy in the distribution of metallicity levels in stars of different populations as compared to closed box models of galactic chemical evolution. According to closed box models, which represent galaxies without outside non-metallic material inflow, the distribution of metallicity levels in stars should follow a logarithmic curve. This amounts to high and low mass stars having the least metallicity, with G-type stars inbetween. However, these models are inconsistent with Milky Way observations. Other galaxies have been shown to have the same problem. The name comes from G-type stars, which are bright enough to be studied easily, yet are most often found unevolved. This provides an extensive look at relatively young stars. Despi

AttributesValues
rdfs:label
  • G-dwarf problem (en)
  • Problema da anã G (pt)
rdfs:comment
  • In astronomy, the G-dwarf problem refers to the apparent discrepancy in the distribution of metallicity levels in stars of different populations as compared to closed box models of galactic chemical evolution. According to closed box models, which represent galaxies without outside non-metallic material inflow, the distribution of metallicity levels in stars should follow a logarithmic curve. This amounts to high and low mass stars having the least metallicity, with G-type stars inbetween. However, these models are inconsistent with Milky Way observations. Other galaxies have been shown to have the same problem. The name comes from G-type stars, which are bright enough to be studied easily, yet are most often found unevolved. This provides an extensive look at relatively young stars. Despi (en)
  • Em astronomia, o problema da anã G refere-se à aparente discrepância na distribuição dos níveis de metalicidade em estrelas de diferentes populações em comparação com modelos de caixa fechada de evolução química galáctica. De acordo com os modelos de caixa fechada, que representam galáxias sem entrada de material não metálico externo, a distribuição dos níveis de metalicidade nas estrelas deve seguir uma curva logarítmica. Isso equivale a estrelas de massa alta e baixa tendo a menor metalicidade, com estrelas de classe G no meio. No entanto, esses modelos são inconsistentes com as observações da Via Láctea. Outras galáxias mostraram ter o mesmo problema. O nome vem de estrelas de classe G, que são brilhantes o suficiente para serem estudadas facilmente, mas na maioria das vezes são encontr (pt)
dcterms:subject
Wikipage page ID
Wikipage revision ID
Link from a Wikipage to another Wikipage
sameAs
dbp:wikiPageUsesTemplate
has abstract
  • In astronomy, the G-dwarf problem refers to the apparent discrepancy in the distribution of metallicity levels in stars of different populations as compared to closed box models of galactic chemical evolution. According to closed box models, which represent galaxies without outside non-metallic material inflow, the distribution of metallicity levels in stars should follow a logarithmic curve. This amounts to high and low mass stars having the least metallicity, with G-type stars inbetween. However, these models are inconsistent with Milky Way observations. Other galaxies have been shown to have the same problem. The name comes from G-type stars, which are bright enough to be studied easily, yet are most often found unevolved. This provides an extensive look at relatively young stars. Despite this, the G Dwarf problem has also been observed in K and M dwarfs. (en)
  • Em astronomia, o problema da anã G refere-se à aparente discrepância na distribuição dos níveis de metalicidade em estrelas de diferentes populações em comparação com modelos de caixa fechada de evolução química galáctica. De acordo com os modelos de caixa fechada, que representam galáxias sem entrada de material não metálico externo, a distribuição dos níveis de metalicidade nas estrelas deve seguir uma curva logarítmica. Isso equivale a estrelas de massa alta e baixa tendo a menor metalicidade, com estrelas de classe G no meio. No entanto, esses modelos são inconsistentes com as observações da Via Láctea. Outras galáxias mostraram ter o mesmo problema. O nome vem de estrelas de classe G, que são brilhantes o suficiente para serem estudadas facilmente, mas na maioria das vezes são encontradas não-evoluídas. Isso fornece uma visão abrangente de estrelas relativamente jovens. Apesar disso, o problema da anã G também foi observado em anãs K e M. (pt)
prov:wasDerivedFrom
page length (characters) of wiki page
foaf:isPrimaryTopicOf
is Link from a Wikipage to another Wikipage of
is Wikipage redirect of
is foaf:primaryTopic of
Faceted Search & Find service v1.17_git147 as of Sep 06 2024


Alternative Linked Data Documents: ODE     Content Formats:   [cxml] [csv]     RDF   [text] [turtle] [ld+json] [rdf+json] [rdf+xml]     ODATA   [atom+xml] [odata+json]     Microdata   [microdata+json] [html]    About   
This material is Open Knowledge   W3C Semantic Web Technology [RDF Data] Valid XHTML + RDFa
OpenLink Virtuoso version 08.03.3332 as of Dec 5 2024, on Linux (x86_64-generic-linux-glibc212), Single-Server Edition (378 GB total memory, 76 GB memory in use)
Data on this page belongs to its respective rights holders.
Virtuoso Faceted Browser Copyright © 2009-2025 OpenLink Software