Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/CNO_cycle> ?p ?o }
- CNO_cycle abstract "The CNO cycle (for carbon–nitrogen–oxygen) is one of the two (known) sets of fusion reactions by which stars convert hydrogen to helium, the other being the proton–proton chain reaction. Unlike the latter, the CNO cycle is a catalytic cycle. Theoretical models suggest that the CNO cycle is the dominant source of energy in stars more massive than about 1.3 times the mass of the Sun. The proton–proton chain is more important in stars the mass of the Sun or less. This difference stems from temperature dependency differences between the two reactions; pp-chain reactions starts at temperatures around 7006400000000000000♠4×106 K (4 megakelvins), making it the dominant energy source in smaller stars. A self-maintaining CNO chain starts at approximately 7007150000000000000♠15×106 K, but its energy output rises much more rapidly with increasing temperatures. At approximately 7007170000000000000♠17×106 K, the CNO cycle starts becoming the dominant source of energy. The Sun has a core temperature of around 7007157000000000000♠15.7×106 K, and only 7000170000000000000♠1.7% of 4He nuclei produced in the Sun are born in the CNO cycle. The CNO-I process was independently proposed by Carl von Weizsäcker and Hans Bethe in 1938 and 1939, respectively.In the CNO cycle, four protons fuse, using carbon, nitrogen and oxygen isotopes as a catalyst, to produce one alpha particle, two positrons and two electron neutrinos. Although there are various paths and catalysts involved in the CNO cycles, simply speaking all these cycles have the same net result:4 11H + 2 e− → 42He + 2 e+ + 2 e− + 2 νe + 3 γ + 24.7 MeV → 42He + 2 νe + 3 γ + 26.7 MeVThe positrons will almost instantly annihilate with electrons, releasing energy in the form of gamma rays. The neutrinos escape from the star carrying away some energy. One nucleus goes to become carbon, nitrogen, and oxygen isotopes through a number of transformations in an endless loop.".
- CNO_cycle thumbnail CNO_Cycle.svg?width=300.
- CNO_cycle wikiPageID "6061".
- CNO_cycle wikiPageLength "26107".
- CNO_cycle wikiPageOutDegree "53".
- CNO_cycle wikiPageRevisionID "678282965".
- CNO_cycle wikiPageWikiLink Abundance_of_the_chemical_elements.
- CNO_cycle wikiPageWikiLink Alpha_particle.
- CNO_cycle wikiPageWikiLink Annihilation.
- CNO_cycle wikiPageWikiLink Annual_Review_of_Astronomy_and_Astrophysics.
- CNO_cycle wikiPageWikiLink Beta_decay.
- CNO_cycle wikiPageWikiLink Carbon.
- CNO_cycle wikiPageWikiLink Carl_Friedrich_von_Weizsäcker.
- CNO_cycle wikiPageWikiLink Catalytic_cycle.
- CNO_cycle wikiPageWikiLink Category:Nuclear_fusion.
- CNO_cycle wikiPageWikiLink Category:Stellar_physics.
- CNO_cycle wikiPageWikiLink Electron_neutrino.
- CNO_cycle wikiPageWikiLink Electronvolt.
- CNO_cycle wikiPageWikiLink Electron–positron_annihilation.
- CNO_cycle wikiPageWikiLink Fluorine.
- CNO_cycle wikiPageWikiLink Gamma_ray.
- CNO_cycle wikiPageWikiLink Globular_cluster.
- CNO_cycle wikiPageWikiLink Half-life.
- CNO_cycle wikiPageWikiLink Hans_Bethe.
- CNO_cycle wikiPageWikiLink Helium.
- CNO_cycle wikiPageWikiLink Hydrogen.
- CNO_cycle wikiPageWikiLink Invariant_mass.
- CNO_cycle wikiPageWikiLink Luminosity.
- CNO_cycle wikiPageWikiLink Main_sequence.
- CNO_cycle wikiPageWikiLink Momentum.
- CNO_cycle wikiPageWikiLink Neutrino.
- CNO_cycle wikiPageWikiLink Nitrogen.
- CNO_cycle wikiPageWikiLink Nova.
- CNO_cycle wikiPageWikiLink Nuclear_drip_line.
- CNO_cycle wikiPageWikiLink Nuclear_fusion.
- CNO_cycle wikiPageWikiLink Nuclear_reaction.
- CNO_cycle wikiPageWikiLink Oxygen.
- CNO_cycle wikiPageWikiLink Physical_Review.
- CNO_cycle wikiPageWikiLink Positron.
- CNO_cycle wikiPageWikiLink Positron_emission.
- CNO_cycle wikiPageWikiLink Proton.
- CNO_cycle wikiPageWikiLink Proton–proton_chain_reaction.
- CNO_cycle wikiPageWikiLink Q_value_(nuclear_science).
- CNO_cycle wikiPageWikiLink Radionuclide.
- CNO_cycle wikiPageWikiLink Red_giant.
- CNO_cycle wikiPageWikiLink Solar_core.
- CNO_cycle wikiPageWikiLink Star.
- CNO_cycle wikiPageWikiLink Stellar_evolution.
- CNO_cycle wikiPageWikiLink Stellar_nucleosynthesis.
- CNO_cycle wikiPageWikiLink Sun.
- CNO_cycle wikiPageWikiLink Triple-alpha_process.
- CNO_cycle wikiPageWikiLink X-ray_burster.
- CNO_cycle wikiPageWikiLink File:CNO_Cycle.svg.
- CNO_cycle wikiPageWikiLink File:NuclearReaction.png.
- CNO_cycle wikiPageWikiLinkText "Bethe–Weizsäcker process".
- CNO_cycle wikiPageWikiLinkText "CN cycle".
- CNO_cycle wikiPageWikiLinkText "CNO cycle".
- CNO_cycle wikiPageWikiLinkText "CNO fusion".
- CNO_cycle wikiPageWikiLinkText "CNO process".
- CNO_cycle wikiPageWikiLinkText "CNO".
- CNO_cycle wikiPageWikiLinkText "carbon cycle".
- CNO_cycle wikiPageWikiLinkText "carbon-nitrogen cycle".
- CNO_cycle wikiPageWikiLinkText "carbon-nitrogen-oxygen (CNO) cycle".
- CNO_cycle wikiPageWikiLinkText "carbon-nitrogen-oxygen cycle (CNO cycle)".
- CNO_cycle wikiPageWikiLinkText "carbon-nitrogen-oxygen cycle".
- CNO_cycle wikiPageWikiLinkText "carbon–nitrogen–oxygen cycle".
- CNO_cycle wikiPageWikiLinkText "hydrogen fusion".
- CNO_cycle wikiPageWikiLinkText "the presence of carbon atoms as a kind of catalyst".
- CNO_cycle wikiPageUsesTemplate Template:Citation_needed.
- CNO_cycle wikiPageUsesTemplate Template:Cite_journal.
- CNO_cycle wikiPageUsesTemplate Template:Clarify.
- CNO_cycle wikiPageUsesTemplate Template:Nuclear_processes.
- CNO_cycle wikiPageUsesTemplate Template:Nuclide2.
- CNO_cycle wikiPageUsesTemplate Template:Reflist.
- CNO_cycle wikiPageUsesTemplate Template:SimpleNuclide2.
- CNO_cycle wikiPageUsesTemplate Template:SubatomicParticle.
- CNO_cycle wikiPageUsesTemplate Template:Use_dmy_dates.
- CNO_cycle wikiPageUsesTemplate Template:Val.
- CNO_cycle subject Category:Nuclear_fusion.
- CNO_cycle subject Category:Stellar_physics.
- CNO_cycle hypernym Sets.
- CNO_cycle type Train.
- CNO_cycle type Physic.
- CNO_cycle type Redirect.
- CNO_cycle comment "The CNO cycle (for carbon–nitrogen–oxygen) is one of the two (known) sets of fusion reactions by which stars convert hydrogen to helium, the other being the proton–proton chain reaction. Unlike the latter, the CNO cycle is a catalytic cycle. Theoretical models suggest that the CNO cycle is the dominant source of energy in stars more massive than about 1.3 times the mass of the Sun. The proton–proton chain is more important in stars the mass of the Sun or less.".
- CNO_cycle label "CNO cycle".
- CNO_cycle sameAs Q222971.
- CNO_cycle sameAs دورة_كربون-نيتروجين-أكسجين.
- CNO_cycle sameAs Cicle_CNO.
- CNO_cycle sameAs CNO_cyklus.
- CNO_cycle sameAs CNO-cyklus.
- CNO_cycle sameAs Bethe-Weizsäcker-Zyklus.
- CNO_cycle sameAs Ciclo_CNO.
- CNO_cycle sameAs چرخه_سیاناو.
- CNO_cycle sameAs Hiilisykli.
- CNO_cycle sameAs Cycle_carbone-azote-oxygène.
- CNO_cycle sameAs Ciclo_carbono-nitróxeno-osíxeno.
- CNO_cycle sameAs מחזור_CNO.
- CNO_cycle sameAs Niz_ugljik-dušik-kisik.
- CNO_cycle sameAs CNO-ciklus.