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Critical Complements: Progress on the Orbit of T Mon1

Published online by Cambridge University Press:  12 April 2016

N. R. Evans
Affiliation:
Harvard Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA
K. Carpenter
Affiliation:
LASP, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA
R. Robinson
Affiliation:
CSC, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA
D. Massa
Affiliation:
Raytheon STX Cor, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA
G. M. Wahlgren
Affiliation:
Dept. of Physics, University of Lund, S-22362 Lund, Sweden
J. Vinkó
Affiliation:
Dept. of Optics, JATE University, H-6720 Szeged, Hungary
L. Szabados
Affiliation:
Konkoly Observatory, P.O. Box 67, H-1525 Budapest XII, Hungary
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Abstract

A preliminary orbit has been derived for the high luminosity, 27-d classical Cepheid T Mon. Velocities for the hot companion have been measured from an HST GHRS spectrum and 3 IUE spectra. The companion velocities are inconsistent with binary orbital motion and it is likely that the companion is itself a short period binary. The HST spectrum also shows that the companion is a chemically peculiar star, probably magnetic.

Type
Part 3. Cepheids, RR Lyrae Stars, Distance Scales
Copyright
Copyright © Astronomical Society of the Pacific 2000

Footnotes

1

Based on observations made with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc. under NASA Contract No. NASA-26555

References

Evans, N.R., Carpenter, K., Robinson, R., Massa, D., Wahlgren, G., Vinkó, J., & Szabados, L. 1999, ApJ, 524, 379 CrossRefGoogle Scholar

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Critical Complements: Progress on the Orbit of T Mon1
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