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Prospects for Detecting Unseen Companions of Periodic Variables

Published online by Cambridge University Press:  07 August 2017

A. Pigulski
A. Pigulski*
Affiliation:
Wrocław University Observatory, Kopernika 11, 51-622 Wrocław, Poland

Abstract

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All periodic variables with stable periods such as pulsating stars, eclipsing binaries and pulsars offer the possibility of detecting unseen companion(s) by means of the light-time effect. We discuss the limitations of the method (the visibility of the effect) for different types of periodic variables. Special attention is paid to the ranges of mass ratios and orbital periods in which unseen companions can be found. We also indicate several systems with light-time effect in which hypothetical companions can be detected by speckle interferometry or precise astrometric observations. In these cases, the detection of the companions may lead to the determination of the components' masses.

Type
2. Current and Future Needs for Very Accurate Astrometry
Information
Symposium - International Astronomical Union , Volume 166: Astronomical and Astrophysical Objectives of Sub-Milliarcsecond Optical Astrometry , 1995 , pp. 205 - 208
Copyright
Copyright © Kluwer 1995 

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