The Hubble Diagram of Type Ia Supernovae as a Function of Host Galaxy Morphology
- Sullivan, M.
- Ellis, R. S.
- Aldering, G.
- Amanullah, R.
- Astier, P.
- Blanc, G.
- Burns, M. S.
- Conley, A.
- Deustua, S. E.
- Doi, M.
- Fabbro, S.
- Folatelli, G.
- Fruchter, A. S.
- Garavini, G.
- Gibbons, R.
- Goldhaber, G.
- Goobar, A.
- Groom, D. E.
- Hardin, D.
- Hook, I.
- Howell, D. A.
- Irwin, M.
- Kim, A. G.
- Knop, R. A.
- Lidman, C.
- Mcmahon, R.
- Mendez, J.
- Nobili, S.
- Nugent, P. E.
- Pain, R.
- Panagia, N.
- Pennypacker, C. R.
- Perlmutter, S.
- Quimby, R.
- Raux, J.
- Regnault, N.
- Ruiz-Lapuente, P.
- Schaefer, B.
- Schahmaneche, K.
- Spadafora, A. L.
- Walton, N. A.
- Wang, L.
- Wood-Vasey, W. M.
- Yasuda, N.
DOIAbstract
MNRAS; post-referee version. 21 pages, 10 figures including 4 colour figures. Preprint also available at http://supernova.lbl.gov/(Abridged) We present new results on the Hubble diagram of distant type Ia supernovae (SNe Ia) segregated according to the type of host galaxy. This makes it possible to check earlier evidence for a cosmological constant by explicitly comparing SNe residing in galaxies likely to contain negligible dust with the larger sample. The cosmological parameters derived from these SNe Ia hosted by presumed dust-free early-type galaxies supports earlier claims for a cosmological constant, which we demonstrate at 5 sigma significance, and the internal extinction implied is small even for late-type systems (A_B<0.2). Thus, o...
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