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The X-ray binary 2S0114+650=LSI+65 010:A slow pulsar or tidally-induced pulsations?
G. Koenigsberger, L. Georgiev, E. Moreno +3
The X-ray source 2S0114+650=LSI+65 010 is a binary system containing a B-type primary and a low mass companion believed to be a neutron star. The system has three reported periodic…
Iron depletion in the hot bubbles in planetary nebulae
Leonid N. Georgiev, Michael G. Richer, Anabel Arrieta +1
We have searched for the emission from \fex and \fexiv that is expected from the gas emitting in diffuse X-rays in \bd, NGC 6543, NGC 7009, and NGC 7027. Neither line was detected…
Broad Halpha wings in Nebulae around Evolved Stars and in Young Planetary Nebulae
A. Arrieta, S. Torres-Peimbert
Eleven objects that have been reported as proto-planetary nebula or as young planetary nebulae that show very extended Halpha wings are presented. The extension of these wings is l…
Optical Line profile variability of the B1+neutron star binary system LS I+65 010 = 2S 0114+650
Gloria Koenigsberger, Gabriela Canalizo, Anabel Arrieta +2
We present high resolution spectroscopic observations of the massive X-ray binary system LS I+65 010=2S 0114+650 in the optical wavelength region. A correlation between equivalent…
The WC6 Wolf-Rayet star MLA 1159 in M31 and its ionization nebula BA 1-642
J. Greiner, G. H. Tovmassian, S. Komossa +2
We report on optical imaging and spectroscopic observations of the Wolf-Rayet candidate star MLA 1159 and the surrounding ionization nebula BA 1-642 in the Andromeda Galaxy. Though…