"PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN" . "0004-6264" . "2" . . "Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae"@en . "RIV/00216305:26110/09:PU85942!RIV11-MSM-26110___" . . "000273307200001" . "221"^^ . "accretion, accretion disks, stars: dwarf novae, stars: novae, cataclysmic variables"@en . "26110" . . "1"^^ . "344824" . . . . . "61" . . "Nov\u00E1k, Rudolf" . "We systematically surveyed period variations of superhumps in SU UMa-type dwarf novae based on newly obtained data and past publications. In many systems, the evolution of the superhump period is found to be composed of three distinct stages: an early evolutionary stage with a longer superhump period, a middle stage with systematically varying periods, and a final stage with a shorter, stable superhump period. During the middle stage, many systems with superhump periods of less than 0.08 d show positive period derivatives. We present observational characteristics of these stages and give greatly improved statistics. Contrary to an earlier claim, we found no clear evidence for a variation of period derivatives among different superoutbursts of the same object. We present an interpretation that the lengthening of the superhump period is a result of the outward propagation of an eccentricity wave, which is limited by the radius near the tidal truncation. We interpret that late-stage superhumps are rejuve"@en . . "RIV/00216305:26110/09:PU85942" . "JP - Japonsko" . . . . . . "99"^^ . "Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae" . "[B6B89E3D9182]" . "Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae" . "We systematically surveyed period variations of superhumps in SU UMa-type dwarf novae based on newly obtained data and past publications. In many systems, the evolution of the superhump period is found to be composed of three distinct stages: an early evolutionary stage with a longer superhump period, a middle stage with systematically varying periods, and a final stage with a shorter, stable superhump period. During the middle stage, many systems with superhump periods of less than 0.08 d show positive period derivatives. We present observational characteristics of these stages and give greatly improved statistics. Contrary to an earlier claim, we found no clear evidence for a variation of period derivatives among different superoutbursts of the same object. We present an interpretation that the lengthening of the superhump period is a result of the outward propagation of an eccentricity wave, which is limited by the radius near the tidal truncation. We interpret that late-stage superhumps are rejuve" . "Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae"@en . . "P(1M0579), S" . . . .