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Note on the Multiplicity of dMe Stars*

  • Sarah Lee Lippincott (a1)

Abstract

There is much current interest in flare stars of the type dMe with particular concern as to their ages and mechanism responsible for flaring. Some fifty Me stars are on the Sproul Astrometric program. They have been discussed as flare stars or potential flare stars (Lippincott 1971). At least half are known to be members of binary or multiple systems. All are on the Sproul program to obtain accurate parallaxes and to analyze the long interval observations for non-linear proper motions indicating unseen companions. The astrometric results are discussed and statistics presented for the multiplicity among these nearby systems.

Resumen

Actualmente hay mucho interés en las estrellas ráfaga de tipo dMe con especial preocupación en conocer sus edades y el mecanismo que produce el destello. Unas 50 estrellas Me están en el programa astrométrico del Observatorio Sproul, las que han sido descritas como estrellas ráfagas o potencialmente ráfagas (Lippincott 1971). Por lo menos de la mitad de ellas, se sabe son miembros de sistemas binarios o múltiples. Todas están en el programa de Sproul para encontrar paralajes precisas y para analizar las observaciones a largo plazo para encontrar movimientos propios no lineales que indiquen la presencia de compañeras invisibles. Se discuten los resultados astrométricos y se presenta la estadística de la multiplicidad entre estos sistemas cercanos.

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Copyright

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*

Figure 1 has been reproduced from the Astronomical Journal, 1973, 78, 935, published by The University of Chicago Press for the American Astronomical Society.

Footnotes

References

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Alden, H. L. 1947, A. J., 52, 138.
Blaauw, A. 1963, Basic Astronomical Data, ed. Strand, K. Aa. (Chicago: University of Chicago Press), 383.
Bopp, B. W. 1973, A. J., 78, 935.
Hershey, J. H. 1973, A. J., 78, 935.
Lippincott, S. L. 1971, IAU Colloquium No. 15, New Directions and New Frontiers in Variable Star Research, Bamberg.

Note on the Multiplicity of dMe Stars*

  • Sarah Lee Lippincott (a1)

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