Toward a Mass for the High Luminosity Cepheid T MON

Details Toward a Mass for the High Luminosity Cepheid T MON Toward a Mass for the High Luminosity Cepheid T MON

Sep 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...192.8204e&link_type=abstract

American Astronomical Society, 192nd AAS Meeting, #82.04; Bulletin of the American Astronomical Society, Vol. 30, p.1155

Astronomy and Astrophysics

Astronomy

Scientific paper

The long period (27(d) ) Cepheid T Mon was shown by Coulson (1983, MNRAS, 203, 925) to have orbital motion. A full orbit has not yet been observed since the first velocities nearly a century ago. However, the ratio of the orbital velocity changes during the last decade provide the mass ratio between the Cepheid and its hot companion. We have obtained new ground-based velocities of the Cepheid which constrain the orbital velocity amplitude. To measure the companion velocities, we have IUE high resolution spectra and also a Hubble Space Telescope Goddard High Resolution Spectrograph spectrum (1840 to 1880 Angstroms). Use of the new data to constrain the mass of the Cepheid will be discussed.

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