Astronomy and Astrophysics – Astrophysics
Scientist
Astronomy and Astrophysics
Astrophysics
Scientist
Observatório Nacional-MCT, Rua José Cristino, 77. CEP 20921-400 São Cristóvão, Rio de Janeiro-RJ, Brazil
Observatorio Nacional, MCT, Rua Gen. Jose Cristino 77, Rio de Janeiro, 20921-400, Brazil
High- and low-resolution spectroscopic observations of the peculiar planetary-nebula HD 149427 (=PC 11)
Symbiotic Stars and Planetary Nebulae in the λ5007/Hβ vs. λ4363/Hγ Diagnostic Diagram
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