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- Technetium_star abstract "A technetium star, or more properly a Tc-rich star, is a star whose stellar spectrum contains absorption lines of the light radioactive metal technetium. The most stable isotope of technetium is 98Tc with a half-life of 4.2 million years, which is too short a time to allow the metal to be material from before the star's formation. Therefore, the detection in 1952 of technetium in stellar spectra provided unambiguous proof of nucleosynthesis in stars, one of the more extreme cases being R Geminorum.Stars containing technetium belong to the class of asymptotic giant branch stars (AGB)—stars that are like red giants, but with a slightly higher luminosity, and which burn hydrogen in an inner shell. Members of this class of stars switch to helium shell burning with an interval of some 100,000 years, in "dredge-ups". Technetium stars belong to the classes M, MS, S, SC and C-N. They are most often variable stars of the long period variable types.Current research indicate that the presence of technetium in AGB stars occurs after some evolution, and that a significant number of these stars do not exhibit the metal in their spectra. The presence of technetium seems to be related to the "third dredge-up" in the history of the stars.".
- Technetium_star wikiPageExternalLink technetium_star.html.
- Technetium_star wikiPageExternalLink www.daviddarling.info.
- Technetium_star wikiPageID "16910595".
- Technetium_star wikiPageLength "2576".
- Technetium_star wikiPageOutDegree "25".
- Technetium_star wikiPageRevisionID "682887045".
- Technetium_star wikiPageWikiLink Asymptotic_giant_branch.
- Technetium_star wikiPageWikiLink Barium_star.
- Technetium_star wikiPageWikiLink Carbon_star.
- Technetium_star wikiPageWikiLink Category:Star_types.
- Technetium_star wikiPageWikiLink Dredge-up.
- Technetium_star wikiPageWikiLink Half-life.
- Technetium_star wikiPageWikiLink Helium.
- Technetium_star wikiPageWikiLink Hydrogen.
- Technetium_star wikiPageWikiLink Isotope.
- Technetium_star wikiPageWikiLink Long-period_variable_star.
- Technetium_star wikiPageWikiLink Long_period_variable.
- Technetium_star wikiPageWikiLink Luminosity.
- Technetium_star wikiPageWikiLink Mercury-manganese_star.
- Technetium_star wikiPageWikiLink Metal.
- Technetium_star wikiPageWikiLink R_Geminorum.
- Technetium_star wikiPageWikiLink Radioactive.
- Technetium_star wikiPageWikiLink Radioactive_decay.
- Technetium_star wikiPageWikiLink Red_giant.
- Technetium_star wikiPageWikiLink Red_giants.
- Technetium_star wikiPageWikiLink S-type_star.
- Technetium_star wikiPageWikiLink Star.
- Technetium_star wikiPageWikiLink Star_spectrum.
- Technetium_star wikiPageWikiLink Stellar_classification.
- Technetium_star wikiPageWikiLink Stellar_nucleosynthesis.
- Technetium_star wikiPageWikiLink Technetium.
- Technetium_star wikiPageWikiLink Variable_star.
- Technetium_star wikiPageWikiLinkText "Technetium star".
- Technetium_star wikiPageWikiLinkText "technetium star".
- Technetium_star hasPhotoCollection Technetium_star.
- Technetium_star wikiPageUsesTemplate Template:Cite_web.
- Technetium_star wikiPageUsesTemplate Template:Giant-star-stub.
- Technetium_star wikiPageUsesTemplate Template:Reflist.
- Technetium_star wikiPageUsesTemplate Template:Star.
- Technetium_star subject Category:Star_types.
- Technetium_star hypernym Star.
- Technetium_star type Star.
- Technetium_star comment "A technetium star, or more properly a Tc-rich star, is a star whose stellar spectrum contains absorption lines of the light radioactive metal technetium. The most stable isotope of technetium is 98Tc with a half-life of 4.2 million years, which is too short a time to allow the metal to be material from before the star's formation.".
- Technetium_star label "Technetium star".
- Technetium_star sameAs Estel_de_tecneci.
- Technetium_star sameAs Estrella_de_tecnecio.
- Technetium_star sameAs Tekneziozko_izar.
- Technetium_star sameAs Étoile_à_technétium.
- Technetium_star sameAs Stella_al_tecnezio.
- Technetium_star sameAs テクネチウム星.
- Technetium_star sameAs 테크네튬_별.
- Technetium_star sameAs Estrela_de_tecnécio.
- Technetium_star sameAs m.04_1qr2.
- Technetium_star sameAs Stea_de_tehnețiu.
- Technetium_star sameAs Технециевая_звезда.
- Technetium_star sameAs Q1351748.
- Technetium_star sameAs Q1351748.
- Technetium_star sameAs 鍀星.
- Technetium_star wasDerivedFrom Technetium_star?oldid=682887045.
- Technetium_star isPrimaryTopicOf Technetium_star.