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The weak magnetic field of the O9.7 supergiant zeta Orionis A
J. -C. Bouret, J. -F. Donati, F. Martins +4
We report here the detection of a weak magnetic field of 50 - 100 G on the O9.7 supergiant zeta Ori A, using spectropolarimetric observations obtained with NARVAL at the 2m Telesco…
WELS - Ultraviolet Spectra and Expanding Atmosphere Models
W. L. F. Marcolino
The ultraviolet spectra of all "weak emission line central stars of planetary nebulae" (WELS) with available IUE data is analyzed. We found that the WELS can be divided in three di…
The Ultraviolet Spectra of the Weak Emission Line Central Stars of Planetary Nebulae
W. L. F. Marcolino, F. X. de Araujo, H. B. M. Junior +1
The ultraviolet spectra of all ``weak emission line central stars of planetary nebulae'' (WELS) with available IUE data are presented and discussed. We performed line identificatio…
Spectroscopic analysis of two peculiar emission line stars: RJHA 49 and SS73 21
C. B. Pereira, W. L. F. Marcolino, M. Machado +1
Aims: To investigate the spectra and the evolutionary stages of two peculiar emission-line stars: RJHA 49 and SS73 21. Methods: We used low and high resolution optical data. Line i…
Detailed Far-UV to Optical Analysis of Four [WR] Stars
W. L. F. Marcolino, D. J. Hillier, F. X. de Araujo +1
We present far-UV to optical analyses of four hydrogen deficient central stars of planetary nebulae: BD+303639, NGC 40, NGC 5315 and NGC 6905. Using the radiative transfer code CMF…