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Calibrating Type Ia SNe Using the Planetary Nebula Luminosity Function

  • G. H. Jacoby (a1), M. M. Phillips (a2) and J. J. Feldmeier (a3)

Abstract

Using the [O III] 5007 Planetary Nebula Luminosity Function (PNLF) distance indicator, we can double the number of known distances to nearby Type Ia SNe, and hence improve their zero point calibration while searching for systematic offsets in SN Ia luminosities between young populations (spiral galaxy) and old populations (ellipticals). We report three new PNLF distances and two new lower limits for five galaxies (NGC 524, 1316, 1380, 1448, & 4526) that have hosted well-observed Type Ia SNe. From the PNLF, we find a Hubble constant of 75 km/s/Mpc, whereas we derive H$_0$=72 from Cepheids and H$_0$=73 from SBF.

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Keywords

Calibrating Type Ia SNe Using the Planetary Nebula Luminosity Function

  • G. H. Jacoby (a1), M. M. Phillips (a2) and J. J. Feldmeier (a3)

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