Abstract
In an earlier paper the spectroscopic detection was reported of the secondaries in the three AM Her type systems, CW1103+254, PG1550+191 and E2003+225. In this paper, high-resolution spectrophotometry of these stars is presented in the wavelength region lambda lambda 7550-8850. In all three cases, the radial velocity variation of the second star has been detected using the Na I doublet at lambda lambda 8183-94. Combined with values for each system's inclination estimated from polarimetry, constraints on the white dwarf masses are derived. The average of our best estimates for the white dwarf masses in these systems and AM Her itself is approx.0.6 solar masses, essentially coincident with the masses of isolated white dwarfs.
Citation Formats
Mukai, K, and Charles, P A.
Orbital motion of the secondary in three AM Her systems: evidence for low-mass white dwarfs.
United Kingdom: N. p.,
1987.
Web.
Mukai, K, & Charles, P A.
Orbital motion of the secondary in three AM Her systems: evidence for low-mass white dwarfs.
United Kingdom.
Mukai, K, and Charles, P A.
1987.
"Orbital motion of the secondary in three AM Her systems: evidence for low-mass white dwarfs."
United Kingdom.
@misc{etde_6289335,
title = {Orbital motion of the secondary in three AM Her systems: evidence for low-mass white dwarfs}
author = {Mukai, K, and Charles, P A}
abstractNote = {In an earlier paper the spectroscopic detection was reported of the secondaries in the three AM Her type systems, CW1103+254, PG1550+191 and E2003+225. In this paper, high-resolution spectrophotometry of these stars is presented in the wavelength region lambda lambda 7550-8850. In all three cases, the radial velocity variation of the second star has been detected using the Na I doublet at lambda lambda 8183-94. Combined with values for each system's inclination estimated from polarimetry, constraints on the white dwarf masses are derived. The average of our best estimates for the white dwarf masses in these systems and AM Her itself is approx.0.6 solar masses, essentially coincident with the masses of isolated white dwarfs.}
journal = []
volume = {226:1}
journal type = {AC}
place = {United Kingdom}
year = {1987}
month = {May}
}
title = {Orbital motion of the secondary in three AM Her systems: evidence for low-mass white dwarfs}
author = {Mukai, K, and Charles, P A}
abstractNote = {In an earlier paper the spectroscopic detection was reported of the secondaries in the three AM Her type systems, CW1103+254, PG1550+191 and E2003+225. In this paper, high-resolution spectrophotometry of these stars is presented in the wavelength region lambda lambda 7550-8850. In all three cases, the radial velocity variation of the second star has been detected using the Na I doublet at lambda lambda 8183-94. Combined with values for each system's inclination estimated from polarimetry, constraints on the white dwarf masses are derived. The average of our best estimates for the white dwarf masses in these systems and AM Her itself is approx.0.6 solar masses, essentially coincident with the masses of isolated white dwarfs.}
journal = []
volume = {226:1}
journal type = {AC}
place = {United Kingdom}
year = {1987}
month = {May}
}