Matches in SemOpenAlex for { <https://semopenalex.org/work/W2090852404> ?p ?o ?g. }
Showing items 1 to 66 of
66
with 100 items per page.
- W2090852404 endingPage "754" @default.
- W2090852404 startingPage "736" @default.
- W2090852404 abstract "We utilize 210 years of β Lyrae eclipse timings [(O-C)s] and 100 years of radial velocities to search for eccentricity and apsidal motion, and for periodic variations. No (O-C) periods pass standard significance tests, but we find eight significant radial velocity periods by independent methods of time series analysis. Waveforms of the eight periodicities are readily seen in phase plots, with most not being simple sinusoids. The causes are not known, but could be orbiting stars. Inspection of the few existing polarimetric observations at two well-separated epochs does not find the radial velocity periods reproducibly. We looked thoroughly for direct evidence of eccentricity, but without success. Eccentricity that is approximately constant and as large as 0.010 seems ruled out, but e almost as large as this is possible, especially if it is variable on short time-scales. Apsidal motion could be a sensitive indicator of small e, but large gaps in the radial velocity record make apsidal motion detection difficult. We searched by three methods, but found only a few doubtful possibilities for apsidal periods. We also investigated several mechanisms for the previously known 283-d light-curve period by estimating ranges of plausible apsidal and precession periods. Apsidal periods are much too long to account for the 283-d variation, and precession is incompatible with existing photometry. Disc pulsation is so far not ruled out. Taking note of the uniquely constant orbital period change that has persisted at a consistent +19 s per year for 210 yr, we propose a feedback mechanism to regulate period change via impulsive mass transfer near periastron. The mechanism involves a generalization of the theory of period changes induced by lobe overflow so as to include impulsive overflow, and operates through a (perhaps unobservably) small and variable eccentricity." @default.
- W2090852404 created "2016-06-24" @default.
- W2090852404 creator A5036489051 @default.
- W2090852404 creator A5052420254 @default.
- W2090852404 date "1999-03-11" @default.
- W2090852404 modified "2023-09-26" @default.
- W2090852404 title "Periodicities and regulatory mechanisms in Lyrae" @default.
- W2090852404 doi "https://doi.org/10.1046/j.1365-8711.1999.02255.x" @default.
- W2090852404 hasPublicationYear "1999" @default.
- W2090852404 type Work @default.
- W2090852404 sameAs 2090852404 @default.
- W2090852404 citedByCount "11" @default.
- W2090852404 countsByYear W20908524042012 @default.
- W2090852404 countsByYear W20908524042018 @default.
- W2090852404 countsByYear W20908524042019 @default.
- W2090852404 countsByYear W20908524042022 @default.
- W2090852404 crossrefType "journal-article" @default.
- W2090852404 hasAuthorship W2090852404A5036489051 @default.
- W2090852404 hasAuthorship W2090852404A5052420254 @default.
- W2090852404 hasConcept C121332964 @default.
- W2090852404 hasConcept C1276947 @default.
- W2090852404 hasConcept C150846664 @default.
- W2090852404 hasConcept C17744445 @default.
- W2090852404 hasConcept C180205008 @default.
- W2090852404 hasConcept C190538878 @default.
- W2090852404 hasConcept C194056267 @default.
- W2090852404 hasConcept C199539241 @default.
- W2090852404 hasConcept C41074950 @default.
- W2090852404 hasConcept C44870925 @default.
- W2090852404 hasConcept C51244244 @default.
- W2090852404 hasConcept C62520636 @default.
- W2090852404 hasConcept C81502235 @default.
- W2090852404 hasConceptScore W2090852404C121332964 @default.
- W2090852404 hasConceptScore W2090852404C1276947 @default.
- W2090852404 hasConceptScore W2090852404C150846664 @default.
- W2090852404 hasConceptScore W2090852404C17744445 @default.
- W2090852404 hasConceptScore W2090852404C180205008 @default.
- W2090852404 hasConceptScore W2090852404C190538878 @default.
- W2090852404 hasConceptScore W2090852404C194056267 @default.
- W2090852404 hasConceptScore W2090852404C199539241 @default.
- W2090852404 hasConceptScore W2090852404C41074950 @default.
- W2090852404 hasConceptScore W2090852404C44870925 @default.
- W2090852404 hasConceptScore W2090852404C51244244 @default.
- W2090852404 hasConceptScore W2090852404C62520636 @default.
- W2090852404 hasConceptScore W2090852404C81502235 @default.
- W2090852404 hasIssue "4" @default.
- W2090852404 hasLocation W20908524041 @default.
- W2090852404 hasOpenAccess W2090852404 @default.
- W2090852404 hasPrimaryLocation W20908524041 @default.
- W2090852404 hasRelatedWork W1507279343 @default.
- W2090852404 hasRelatedWork W1989693711 @default.
- W2090852404 hasRelatedWork W1991639320 @default.
- W2090852404 hasRelatedWork W1994702306 @default.
- W2090852404 hasRelatedWork W2017641463 @default.
- W2090852404 hasRelatedWork W2029125027 @default.
- W2090852404 hasRelatedWork W2064059958 @default.
- W2090852404 hasRelatedWork W3104025681 @default.
- W2090852404 hasRelatedWork W3106428885 @default.
- W2090852404 hasRelatedWork W4297748620 @default.
- W2090852404 hasVolume "303" @default.
- W2090852404 isParatext "false" @default.
- W2090852404 isRetracted "false" @default.
- W2090852404 magId "2090852404" @default.
- W2090852404 workType "article" @default.