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A critical comparison of spectroscopic and evolutionary masses for O-type binary systems

  • Laura R. Penny (a1), Douglas R. Gies (a2), William G. Bagnuolo (a2), John H. Wise (a2), Artemio Herrero (a3), David J. Stickland (a4) and Chris Lloyd (a4)...

Abstract

We have embarked on a program to directly compare spectroscopic and evolutionary masses with those obtained from a combination of spectroscopic and photometric orbital solutions for O-type binary systems. The ability to directly determine the spectroscopic masses of the individual components of O-type binary systems has been difficult, because of the severe line blending that is present in these systems. Doppler tomography is an iterative scheme, that uses an ensemble of spectra to reconstruct the individual component spectra. These individual spectra can then be analyzed.

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References

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Bagnuolo, W.G., Gies, D.R., Hahula, M.E., et al. 1994, ApJ 423, 446.
Herrero, A., Puls, J., Najarro, P. 2002, A&A 396, 949.
Lloyd, C., Stickland, D.J. 2001, A&A 370, 1026.
Mochnacki, S.W., Doughty, N.A. 1972, MNRAS 156, 51.
Penny, L.R. 1996, ApJ 463, 737.
Penny, L.R., Gies, D.R., Wise, J.H., Stickland, D.J., Lloyd, C. 2002, ApJ 575, 1050.
Schaller, G. Schaerer, D., Meynet, G., Maeder, A. 1992, A&AS 96, 269.
Stickland, D.J., Lloyd, C. 2001, The Observatory 121, 1.
Walborn, N.R., Fitzpatrick, E.L. 1990, PASP 102, 379.

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