Titre du document

The variation of the light curve of W Ursae Majoris

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Nom du Corpus

AstroConcepts

Auteur(s)
  • Robert A. Breinhorst
Affiliation(s)
  • Sternwarte der Universität Bonn, Germany
  • Kitt Peak National Observatory, Tucson, Arizona, USA
Résumé

A new set of photoelectric B and V observations of W Ursae Majoris obtained during a period of one week in 1968 is presented. From the measurements it can be concluded that in general the light curve in both colors is free from complications. In particular, no systematic brightness differences between consecutive periods can be found. The observations made during total eclipse in two different periods yield flat minima fitting almost perfectly together, the mean error of the single measurement beeing of the order of 0.m003. The duration of the phase of totality is estimated to 0.036P=17.3 m thus confirming the value given by Cester and Gridelli. From a plot of the square deviations of the single observations (?I/I)2 from the mean intensity curve vs phase it can be shown that the scattering decreases strongly during primary eclipse thus indicating that the source producing these fluctuations is essentially confined to the space between the two components. A comparison with earlier photoelectric observations also supports the assumption that the variational behavior of the light curve is caused by a gaseous cloud between the two components rather than by an envelope surrounding the whole system.

Langue(s) du document
Anglais
Année de publication
1971
Revue

Astrophysics and Space Science

Éditeur
Springer (journals)
Type de publication
journal
Type de document
research-article
Présence de XML structuré
Non
Version de PDF
1.3
Score de qualité du texte
9.328
Nom du concept
  • Roche equipotentials
Catégories Science-Metrix
  • 1 - natural sciences ; 2 - physics & astronomy ; 3 - astronomy & astrophysics
Catégories Inist
  • 1 - sciences appliquees, technologies et medecines ; 2 - sciences biologiques et medicales ; 3 - sciences biologiques fondamentales et appliquees. psychologie
Catégories Scopus
  • 1 - Physical Sciences ; 2 - Earth and Planetary Sciences ; 3 - Space and Planetary Science
  • 1 - Physical Sciences ; 2 - Physics and Astronomy ; 3 - Astronomy and Astrophysics
Catégories WoS
  • 1 - science ; 2 - astronomy & astrophysics
Identifiant ISTEX
3DAB0FE1CD9BFD6AEBC714BD20729112C279BC7D
ark:/67375/1BB-NPSKML68-F
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