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New Results on the Binary Companion of T Tauri

Published online by Cambridge University Press:  12 April 2016

Theodore Simon ,
P.R. Schwartz ,
H.M. Dyck  and
B. Zuckerman
Theodore Simon
Affiliation:
Institute for Astronomy, University of Hawaii
P.R. Schwartz
Affiliation:
Naval Research Laboratory, Washington, D. C.
H.M. Dyck
Affiliation:
Institute for Astronomy, University of Hawaii
B. Zuckerman
Affiliation:
Astronomy Program, University of Maryland

Extract

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We have recently reported the discovery of a cool (650–800 K) low-luminosity companion to the pre-main-sequence star, T Tauri (Dyck et al. 1982). We proposed that the optical star and its infrared companion form a physical pair with a N-S separation of 100 a.u. However, there remained in our 2-5 μm speckle interferometry an ambiguity of 180° in the position angle of the secondary. In addition, Cohen et al. (1982) noted an 800 milliarcsec (mas) offset between the visual and 6 cm radio positions at T Tau. Both of these positional discrepancies have now been clarified by accurate visual and radio astrometry of T Tau, and by further near-IR speckle interferometry.

Type
Session III: Observed Activity in Related Objects
Information
International Astronomical Union Colloquium , Volume 71: Activity in Red-Dwarf Stars , 1983 , pp. 505 - 507
Copyright
Copyright © Reidel 1983

References

REFERENCES

Cohen, M., Bieging, J. H., and Schwartz, P. R.: 1982, Astrophys. J. 253, p. 707.Google Scholar
Dyck, H. M., Simon, T., and Zuckerman, B.: 1982, Astrophys. J. (Letters) 255, p. L103.Google Scholar
Hartmann, L., Edwards, S., and Avrett, E.: 1982, Astrophys. J. in press.Google Scholar
Jones, B. F., and Hanson, R. B.: 1982, private communication.Google Scholar