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- Subgiant abstract "A subgiant is a star that is slightly brighter than a normal main-sequence (dwarf) star of the same spectral class, but not as bright as true giant stars. Although certain subgiants appear to be simply unusually bright metal-rich hydrogen-fusing stars (in the same way subdwarfs are unusually dim metal-poor hydrogen-fusing stars), they are generally believed to be stars that are ceasing or have already ceased fusing hydrogen in their cores. In stars of roughly a solar mass (M☉), this causes the core to contract, which increases the star's central temperature enough to move hydrogen fusion into a shell surrounding the core. This swells the star on the way to becoming a true giant. At the start of the subgiant phase (such as a star like Procyon A and Omicron2 Cancri) the diameter and brightness have increased, but the star has yet to cool down or change color significantly. Later subgiants that are closer to becoming true giants have larger diameters and lower temperature than stars of similar mass in the main sequence. Overall luminosity changes little during the subgiant stage, as shown by a more or less horizontal evolution off the immediate main sequence; this feature is prominent in Hertzsprung–Russell diagrams of globular clusters, as the lateral extension after the turnoff point but before the "ascent" to red giant status.Many subgiants are rich in metals, and commonly host orbiting planets. Partly for these reasons, and also because the subgiant phase can last up to a few billion years, subgiants are the only type of stars other than main-sequence stars believed capable of hosting life-bearing planets. In Yerkes spectral classification their luminosity class is IV.".
- Subgiant wikiPageID "1575168".
- Subgiant wikiPageLength "2860".
- Subgiant wikiPageOutDegree "19".
- Subgiant wikiPageRevisionID "682886849".
- Subgiant wikiPageWikiLink Category:Star_types.
- Subgiant wikiPageWikiLink Giant_star.
- Subgiant wikiPageWikiLink Giant_stars.
- Subgiant wikiPageWikiLink Globular_cluster.
- Subgiant wikiPageWikiLink Globular_clusters.
- Subgiant wikiPageWikiLink Hertzsprung–Russell_diagram.
- Subgiant wikiPageWikiLink Hydrogen.
- Subgiant wikiPageWikiLink Kappa_Andromedae_b.
- Subgiant wikiPageWikiLink Main_sequence.
- Subgiant wikiPageWikiLink Nuclear_fusion.
- Subgiant wikiPageWikiLink Omicron2_Cancri.
- Subgiant wikiPageWikiLink Procyon.
- Subgiant wikiPageWikiLink Procyon_A.
- Subgiant wikiPageWikiLink Red_giant.
- Subgiant wikiPageWikiLink Solar_mass.
- Subgiant wikiPageWikiLink Spectral_classification.
- Subgiant wikiPageWikiLink Star.
- Subgiant wikiPageWikiLink Stellar_classification.
- Subgiant wikiPageWikiLink Subdwarf.
- Subgiant wikiPageWikiLink Turnoff_point.
- Subgiant wikiPageWikiLink Category:Subgiants.
- Subgiant wikiPageWikiLinkText "K3IVp".
- Subgiant wikiPageWikiLinkText "Subgiant".
- Subgiant wikiPageWikiLinkText "Subgiants".
- Subgiant wikiPageWikiLinkText "blue subgiant".
- Subgiant wikiPageWikiLinkText "blue-white subgiant".
- Subgiant wikiPageWikiLinkText "orange subgiant".
- Subgiant wikiPageWikiLinkText "subgiant stars".
- Subgiant wikiPageWikiLinkText "subgiant".
- Subgiant wikiPageWikiLinkText "white subgiant".
- Subgiant wikiPageWikiLinkText "yellow subgiant".
- Subgiant hasPhotoCollection Subgiant.
- Subgiant wikiPageUsesTemplate Template:About.
- Subgiant wikiPageUsesTemplate Template:Failed_verification.
- Subgiant wikiPageUsesTemplate Template:Format_footnotes.
- Subgiant wikiPageUsesTemplate Template:Multiple_issues.
- Subgiant wikiPageUsesTemplate Template:Reflist.
- Subgiant wikiPageUsesTemplate Template:Solar_mass.
- Subgiant wikiPageUsesTemplate Template:Star.
- Subgiant wikiPageUsesTemplate Template:Star_nav.
- Subgiant wikiPageUsesTemplate Template:Subgiant-star-stub.
- Subgiant subject Category:Star_types.
- Subgiant subject Category:Subgiants.
- Subgiant hypernym Star.
- Subgiant type Article.
- Subgiant type Star.
- Subgiant type Article.
- Subgiant type Concept.
- Subgiant comment "A subgiant is a star that is slightly brighter than a normal main-sequence (dwarf) star of the same spectral class, but not as bright as true giant stars. Although certain subgiants appear to be simply unusually bright metal-rich hydrogen-fusing stars (in the same way subdwarfs are unusually dim metal-poor hydrogen-fusing stars), they are generally believed to be stars that are ceasing or have already ceased fusing hydrogen in their cores.".
- Subgiant label "Subgiant".
- Subgiant sameAs Subreusester.
- Subgiant sameAs شبه_عملاق.
- Subgiant sameAs Subdivovska_zvijezda.
- Subgiant sameAs Estrella_subgegant.
- Subgiant sameAs Podobr.
- Subgiant sameAs Unterriese.
- Subgiant sameAs Υπογίγαντας.
- Subgiant sameAs Subgigante.
- Subgiant sameAs Azpierraldoi.
- Subgiant sameAs Alijättiläinen.
- Subgiant sameAs Étoile_sous-géante.
- Subgiant sameAs תת-ענק.
- Subgiant sameAs उपदानव_तारा.
- Subgiant sameAs Stella_subgigante.
- Subgiant sameAs 準巨星.
- Subgiant sameAs 준거성.
- Subgiant sameAs Ënnerris.
- Subgiant sameAs Submilžinė.
- Subgiant sameAs Subreus.
- Subgiant sameAs Subkjempe.
- Subgiant sameAs Podolbrzym.
- Subgiant sameAs Estrela_subgigante.
- Subgiant sameAs m.05cp0n.
- Subgiant sameAs Stea_subgigantă.
- Subgiant sameAs Субгигант.
- Subgiant sameAs Podobor.
- Subgiant sameAs ดาวยักษ์เล็ก.
- Subgiant sameAs Q6227.
- Subgiant sameAs Q6227.
- Subgiant sameAs 次巨星.
- Subgiant wasDerivedFrom Subgiant?oldid=682886849.
- Subgiant isPrimaryTopicOf Subgiant.