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Spectropolarimetry of the dwarf nova IP Peg
Dhillon, V. S.; Rutten, R. G. M.
We present spectropolarimetric observations of the eclipsing dwarf nova IP Peg in quiescence. The data show linear polarizations with a mean value of 0.10+/-0.06 per cent. There are no significant differences between the continuum and line polarizations and no significant variations with wavelength or binary phase. We argue that the measured polar…
A photoionization model of the nebula around the WC11 star M4-18
Rao, N. Kameswara; Surendiranath, R.
A photoionization code has been developed incorporating provision for the presence of dust mixed with gas. M4-18 has been modelled utilizing optical CCD spectra and other observations ranging from UV to radio wavelengths. T_e and N_e from the model are 6600K and 6050 cm^-3, respectively. The abundances of C, N and Ne are found to be the same as th…
Average unreddened UV flux distributions of OB dwarfs
Megier, Andrzej
The average intrinsic flux distributions for early-type main-sequence stars are obtained from IUE low-dispersion spectra. The colour-excess dereddening method allows stars of various colour excesses to be included in the samples. The resulting spectra are free from all interstellar extinction effects that correlate with E(B-V).