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astro-ph2004
The PNLF distance to the Sculptor Group galaxy NGC 55
G. C. Van de Steene, G. H. Jacoby, C. Praet +2
We identified 21 new Planetary Nebula (PN) candidates in the Sculptor Group galaxy NGC 55. We determined a most likely distance of 2.00 +/- 0.2 Mpc using the Planetary Nebulae Lumi…
astro-ph2004
The Planetary Nebula Luminosity Function
Robin Ciardullo
The [O III] 5007 planetary nebula luminosity function (PNLF) occupies an important place on the extragalactic distance ladder: it is the only standard candle that can be applied to…