Observations of Two Peculiar Emission Objects in the Large Magellanic Cloud

Authors

Menas Kafatos, Chapman UniversityFollow
A. G. Michalitsianos, NASA, Goddard Space Flight CenterFollow
D. A. Allen, U.S. Institute of Surgical Research
R. E. Stencel, University of DenverFollow

Document Type

Article

Publication Date

1983

Abstract

Ultraviolet and visual wavelength spectra were obtained of two peculiar emission objects, Henize S63 and Sanduleak.'s star in the Large Magellanic Cloud. Previously not observed in the near- or far-ultraviolet, both objects exhibit strong permitted and semiforbidden line emission. Estimates based on the absolute continuum flux of the hot companion star in Hen S63 indicate that it rivals the luminosity of the carbon star primary. The emission-line profile structure in both objects does not suggest Wolf-Rayet type emission. Carbon in Sanduleak.'s star (LMC anonymous) is conspicuously absent, while N v, N IV], and N III] dominate the UV emission-line spectrum. Nitrogen is overabundant with respect to carbon and oxygen in both objects. The large overabundance of nitrogen in Sanduleak.'s star suggests evidence for CNO processed material similar to that seen in 'II Car.

Comments

This article was originally published in Astrophysical Journal, volume 275, in 1983. DOI: 10.1086/161557

Recommended Citation

Kafatos, M., Michalitsianos, A.G. Allen, D.A., Stencel, R.E. (1983). Observations of two peculiar emission objects in the Large Magellanic Cloud, The Astrophysical Journal, 275: 584-591. doi: 10.1086/161557

Peer Reviewed

1

Copyright

IOP Publishing