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Intermediate- and high-resolution optical spectroscopy on the nascent planetary nebula Vy 2-2: Evidence of binary-star evolution
Planetary nebulae (PNe) tend to show spectacular non-spherical shapes whose origin is not fully understood. Crucial information about PNe formation can be obtained by studying their very first stages. We present and analyze new intermediate- and échelle high-resolution spectra of the nascent PN Vy 2
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