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astro-ph.SR2019★ 4 cited
Hunting white dwarfs at the center of planetary nebulae
Javier Ahumada, Walter Weidmann, Marcelo Miller Bertolami +1
We present Gemini-South observations of nine faint and extended planetary nebulae. Using direct images taken with the spectrograph GMOS, we built the vs. di…
astro-ph.SR2015★ 20 cited
Improved spectral descriptions of planetary nebulae central stars
Walter Weidmann, Roberto Mendez, Roberto Gamen
Context. At least 492 central stars of Galactic planetary nebulae (CSPNs) have been assigned spectral types. Since many CSPNs are faint, these classification efforts are frequently…