Astronomy and Astrophysics – Astronomy
Scientific paper
May 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.226..209m&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 226, May 1, 1987, p. 209-235.
Astronomy and Astrophysics
Astronomy
65
Companion Stars, Red Dwarf Stars, Stellar Mass, Stellar Motions, Stellar Orbits, White Dwarf Stars, Light Curve, Radial Velocity
Scientific paper
In an earlier paper (Mukai and Charles, 1986), the authors have reported the spectroscopic detection of the secondaries in the three AM Her type systems, CW 1103+254, PG 1550+191 and E 2003+225. In this paper the authors present their high-resolution spectrophotometry of these stars in the wavelength region λλ7550 - 8850. In all three cases, they have successfully detected the radial velocity variation of the second star using the Na I doublet at λλ8183 - 94. Combined with values for each system's inclination, estimated from polarimetry, the authors derive constraints on the white dwarf masses. The average of their best estimates for the white dwarf masses in these systems and AM Her itself is ≡0.6 M_sun;, essentially coincident with the masses of isolated white dwarfs.
Charles Phil A.
Mukai Kazuhiko
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