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- Semiregular_variable_star abstract "Semiregular variable stars are giants or supergiants of intermediate and late spectral type showing considerable periodicity in their light changes, accompanied or sometimes interrupted by various irregularities. Periods lie in the range from 20 to more than 2000 days, while the shapes of the light curves may be rather different and variable with each cycle. The amplitudes may be from several hundredths to several magnitudes (usually 1-2 magnitudes in the V filter).Semiregular variables are classified in several subtypes:SRA: Spectral-type (M, C, S or Me, Ce, Se) giants displaying persistent periodicity and usually small amplitude, less than 2.5 magnitudes in V. R Doradus and RX Leporis are examples of this class. Amplitudes and light-curve shapes generally vary and periods are in the range of 35–1200 days. Many of these stars differ from Mira variables only by showing smaller light amplitudes, and they are essentially Mira variables pulsating in an overtone, while the Miras themselves pulsate in a fundamental mode.SRB: Spectral-type (M, C, S or Me, Ce, Se) giants with poorly defined periodicity (mean cycles in the range of 20 to 2300 days) or with alternating intervals of periodic and slow irregular changes. Some may occasionally cease varying at all for a time. RR Coronae Borealis and T Centauri are examples of this behavior. Every star of this type may usually be assigned a certain mean period. In a number of cases, the simultaneous presence of two or more periods of light variation is observed.SRC: Spectral-type (M, C, S or Me, Ce, Se) supergiants with amplitudes of about 1 mag and periods of light variation from 30 days to several thousand days. Mu Cephei and Betelgeuse are bright examples of this class.SRD: Giants and supergiants of F, G, or K spectral types, sometimes with emission lines in their spectra. Amplitudes of light variation are in the range from 0.1 to 4 mag, and the range of periods is from 30 to 1100 days. V810 Centauri is an example of this class. The globular cluster M13 contains a dozen red variable stars from 11.95 to 12.25 visual magnitude, and with period of 43 days (V24) to 97 days (V43).↑ ↑".
- Semiregular_variable_star wikiPageExternalLink 0701.shtml.
- Semiregular_variable_star wikiPageID "140440".
- Semiregular_variable_star wikiPageLength "3427".
- Semiregular_variable_star wikiPageOutDegree "22".
- Semiregular_variable_star wikiPageRevisionID "665652426".
- Semiregular_variable_star wikiPageWikiLink Apparent_magnitude.
- Semiregular_variable_star wikiPageWikiLink Betelgeuse.
- Semiregular_variable_star wikiPageWikiLink Category:Semiregular_variable_stars.
- Semiregular_variable_star wikiPageWikiLink Day.
- Semiregular_variable_star wikiPageWikiLink Globular_cluster.
- Semiregular_variable_star wikiPageWikiLink Light_curve.
- Semiregular_variable_star wikiPageWikiLink List_of_semiregular_variable_stars.
- Semiregular_variable_star wikiPageWikiLink Low-dimensional_chaos_in_stellar_pulsations.
- Semiregular_variable_star wikiPageWikiLink Messier_13.
- Semiregular_variable_star wikiPageWikiLink Mira_variable.
- Semiregular_variable_star wikiPageWikiLink Mu_Cephei.
- Semiregular_variable_star wikiPageWikiLink RR_Coronae_Borealis.
- Semiregular_variable_star wikiPageWikiLink RX_Leporis.
- Semiregular_variable_star wikiPageWikiLink R_Doradus.
- Semiregular_variable_star wikiPageWikiLink Red_giant.
- Semiregular_variable_star wikiPageWikiLink Stellar_classification.
- Semiregular_variable_star wikiPageWikiLink Supergiant.
- Semiregular_variable_star wikiPageWikiLink T_Centauri.
- Semiregular_variable_star wikiPageWikiLink V810_Centauri.
- Semiregular_variable_star wikiPageWikiLink Variable_star.
- Semiregular_variable_star wikiPageWikiLink Variable_star_designation.
- Semiregular_variable_star wikiPageWikiLinkText "(semi-regular)".
- Semiregular_variable_star wikiPageWikiLinkText "SR".
- Semiregular_variable_star wikiPageWikiLinkText "SRB".
- Semiregular_variable_star wikiPageWikiLinkText "SRC".
- Semiregular_variable_star wikiPageWikiLinkText "SRV".
- Semiregular_variable_star wikiPageWikiLinkText "SRb".
- Semiregular_variable_star wikiPageWikiLinkText "SRc".
- Semiregular_variable_star wikiPageWikiLinkText "SRd".
- Semiregular_variable_star wikiPageWikiLinkText "Semi-regular pulsating".
- Semiregular_variable_star wikiPageWikiLinkText "Semi-regular".
- Semiregular_variable_star wikiPageWikiLinkText "Semiregular variable star".
- Semiregular_variable_star wikiPageWikiLinkText "Semiregular variable".
- Semiregular_variable_star wikiPageWikiLinkText "Semiregular".
- Semiregular_variable_star wikiPageWikiLinkText "Semiregular_variable_star".
- Semiregular_variable_star wikiPageWikiLinkText "semi-regular pulsating star".
- Semiregular_variable_star wikiPageWikiLinkText "semi-regular variable".
- Semiregular_variable_star wikiPageWikiLinkText "semi-regular".
- Semiregular_variable_star wikiPageWikiLinkText "semiregular variable star".
- Semiregular_variable_star wikiPageWikiLinkText "semiregular variable".
- Semiregular_variable_star wikiPageWikiLinkText "semiregular".
- Semiregular_variable_star wikiPageUsesTemplate Template:Reflist.
- Semiregular_variable_star wikiPageUsesTemplate Template:Star.
- Semiregular_variable_star wikiPageUsesTemplate Template:Variable_star_topics.
- Semiregular_variable_star subject Category:Semiregular_variable_stars.
- Semiregular_variable_star hypernym Giants.
- Semiregular_variable_star type Person.
- Semiregular_variable_star type Variable.
- Semiregular_variable_star type Concept.
- Semiregular_variable_star comment "Semiregular variable stars are giants or supergiants of intermediate and late spectral type showing considerable periodicity in their light changes, accompanied or sometimes interrupted by various irregularities. Periods lie in the range from 20 to more than 2000 days, while the shapes of the light curves may be rather different and variable with each cycle.".
- Semiregular_variable_star label "Semiregular variable star".
- Semiregular_variable_star sameAs Q1054411.
- Semiregular_variable_star sameAs Variable_semiregular.
- Semiregular_variable_star sameAs Polopravidelná_proměnná_hvězda.
- Semiregular_variable_star sameAs Halbregelmäßig_veränderlicher_Stern.
- Semiregular_variable_star sameAs Estrella_variable_semirregular.
- Semiregular_variable_star sameAs متغیر_نیمهمنظم.
- Semiregular_variable_star sameAs Puolisäännöllinen_muuttuja.
- Semiregular_variable_star sameAs Étoile_variable_semi-régulière.
- Semiregular_variable_star sameAs Variabile_semiregolare.
- Semiregular_variable_star sameAs 半規則型変光星.
- Semiregular_variable_star sameAs 반규칙_변광성.
- Semiregular_variable_star sameAs Hallefregelméisseg_verännerleche_Stär.
- Semiregular_variable_star sameAs Semiregulær_variabel_stjerne.
- Semiregular_variable_star sameAs Gwiazda_zmienna_półregularna.
- Semiregular_variable_star sameAs m.011hyy.
- Semiregular_variable_star sameAs Полуправильная_переменная_звезда.
- Semiregular_variable_star sameAs Polopravidelná_premenná_hviezda.
- Semiregular_variable_star sameAs Yarıdüzenli_değişenler.
- Semiregular_variable_star sameAs Q1054411.
- Semiregular_variable_star sameAs 半規則變星.
- Semiregular_variable_star wasDerivedFrom Semiregular_variable_star?oldid=665652426.
- Semiregular_variable_star isPrimaryTopicOf Semiregular_variable_star.