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Calibrating Type Ia SNe Using the Planetary Nebula Luminosity Function

Published online by Cambridge University Press:  15 December 2006

G. H. Jacoby ,
M. M. Phillips  and
J. J. Feldmeier
G. H. Jacoby
Affiliation:
WIYN Observatory, 950 N. Cherry Ave., Tucson, AZ 85712, USA email: jacoby@wiyn.org
M. M. Phillips
Affiliation:
Las Campanas Observatory, Colina El Pino, Casilla 601, La Serena, Chile email: mmp@lco.cl
J. J. Feldmeier
Affiliation:
Youngstown State University, Dept. of Physics and Astronomy, One University Plaza, Youngstown, OH 44555, USA email: jjfeldmeier@ysu.edu
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Abstract

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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.

Keywords

Hubble Constantsupernovaegalaxiesdistances
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S234: Planetary Nebulae in our Galaxy and Beyond , April 2006 , pp. 435 - 436
Copyright
© 2006 International Astronomical Union