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Early-type Galaxy Distances from the Fundamental Plane and Surface Brightness Fluctuations
John P. Blakeslee, John R. Lucey, John L. Tonry +3
We compare two methods for deriving distances to early-type galaxies: fundamental plane (FP) and surface brightness fluctuations (SBF) distances for 170 galaxies. A third set of di…
A Synthesis of Data from Fundamental Plane and Surface Brightness Fluctuation Surveys
John P. Blakeslee, John R. Lucey, Brian J. Barris +2
We perform a series of comparisons between distance-independent photometric and spectroscopic properties used in the surface brightness fluctuations (SBF) and fundamental plane (FP…
Type Ia Supernovae, the Hubble Constant, the Cosmological Constant, and the Age of the Universe
John L. Tonry, The High-Z Supernova Search Team
The age of the Universe depends on both the present-day Hubble Constant and on the history of cosmic expansion. For decelerating cosmologies such as Omega_m= 1, the dimensionless p…
Reconciliation of the Surface Brightness Fluctuations and Type Ia Supernovae Distance Scales
Edward A. Ajhar, John L. Tonry, John P. Blakeslee +2
We present Hubble Space Telescope measurements of surface brightness fluctuations (SBF) distances to early-type galaxies that have hosted Type Ia supernovae (SNIa). The agreement i…
The Farthest Known Supernova: Support for an Accelerating Universe and a Glimpse of the Epoch of Deceleration
Adam G. Riess, Peter E. Nugent, Brian P. Schmidt +16
We present photometric observations of an apparent Type Ia supernova (SN Ia) at a redshift of ~1.7, the farthest SN observed to date. SN 1997ff, was discovered in a repeat observat…