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Gil de Paz, Armando ; Silich, S. A. ; Madore, B. F. ; Sánchez Contreras, C. ; Zamorano Calvo, Jaime ; Gallego Maestro, Jesús | Univ. Chicago Press | 2002-07-10We have mapped the ^(12)CO J = 1-0 and J = 2-1 line emission in Markarian 86, one of the most metal- deficient blue compact dwarf galaxies so far detected in ^(12)CO. The ^(12)CO emission is distributed in a horseshoelike structure that follows [...]texto impreso
Sahai, R. ; Findeisen, K. ; Gil de Paz, Armando ; Sánchez Contreras, C. | American Astronomical Society | 2008-12-20The search for binarity in AGB stars is of critical importance for our understanding of how planetary nebulae acquire the dazzling variety of aspherical shapes which characterizes this class. However, detecting binary companions in such stars ha[...]texto impreso
Gil de Paz, Armando ; Silich, S. A. ; Madore, B. F. ; Sánchez Contreras, C. ; Zamorano Calvo, Jaime ; Gallego Maestro, Jesús | American Astronomical Society | 2002-07-10We have mapped the CO^12 J = 1-0 and J = 2-1 line emission in Markarian 86, one of the most metal-deficient blue compact dwarf galaxies so far detected in CO^12. The CO^12 emission is distributed in a horseshoe-like structure that follows the lo[...]texto impreso
Sánchez Contreras, C. ; Sahai, R. ; Gil de Paz, Armando ; Goodrich, R. | University Chicago Press | 2008-11We present echelle long-slit optical spectra of a sample of objects evolving off the asymptotic giant branch (AGB), most of them in the preplanetary nebula (PPN) phase, obtained with the ESI and MIKE spectrographs at the 10 m Keck II and 6.5 m M[...]texto impreso
Sánchez Contreras, C. ; Bujarrabal, V. ; Miranda, L. F. ; Fernández Figueroa, María José | EDP Sciencies | 2000-03We present optical long-slit spectra and complementary broad and narrow band images of the bipolar protoplanetary nebula OH231.8+4.2. Absolute J2000 coordinates have been calculated for our maps from the position of nearby stars. Our maps of the[...]
