K Corrections For Type Ia Supernovae and a Test for Spatial Variation of the Hubble Constant

A. Kim , S. Deustua , S. Gabi , G. Goldhaber , D. Groom , I. Hook , M. Kim , J. R. Lee , R. Pain (1) , C. Pennypacker , S. Perlmutter , I. Small , A. Goobar , R. Ellis , K. Glazebrook , R. Mcmahon , B. Boyle , P. Bunclark , D. Carter , M. Irwin , H. Newberg , A. V. Filippenko , T. Matheson , M. Dopita , J. Mould , W. Couch

1 LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies

Cross-filter K corrections for a sample of "normal" Type Ia supernovae (SNe) have been calculated for a range of epochs. With appropriate filter choices, the combined statistical and systematic K correction dispersion of the full sample lies within 0.05 mag for redshifts z<0.7. This narrow dispersion of the calculated K correction allows the Type Ia to be used as a cosmological probe. We use the K corrections with observations of seven SNe at redshifts 0.3 < z <0.5 to bound the possible difference between the locally measured Hubble constant (H_L) and the true cosmological Hubble constant (H_0).

Domaines: Cosmologie et astrophysique extra-galactique [astro-ph.CO]; Astrophysique [astro-ph]

A. Kim, S. Deustua, S. Gabi, G. Goldhaber, D. Groom, et al.. K Corrections For Type Ia Supernovae and a Test for Spatial Variation of the Hubble Constant. Thermonuclear Supernovae, Jun 1995, Parador d'Aiguablava, Spain. ⟨in2p3-00131067⟩