THE DISTANCES TO 5 TYPE-II SUPERNOVAE USING THE EXPANDING PHOTOSPHERE METHOD, AND THE VALUE OF HO
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We have used observations gathered at CTIO to measure distances by the expanding photosphere method (EPM) to five Type II supernovae. These supernovae lie at redshifts from cz = 1100 km s-1 to cz - 5500 km s-1, and increase to 18 the number of distances; measured using EPM. We compare distances derived to 11 Type II supernovae with distances to their host galaxies measured using the Tully-Fisher method. We find that the Tully-Fisher distances average 11% +/- 7% smaller. The comparison shows no significant evidence of any large distance-dependent bias in the Tully-Fisher distances. We employ the sample of EPM distances from 4.5 Mpc to 180 Mpc to derive a value for the Hubble constant. We find H-0 = 73 +/- 6(statistical) +/- 7(systematic) km s-1 Mpc-1.
Artículo de publicación ISI
DOI: DOI: 10.1086/174546