Laura Ferrarese

Jeremy R. Mould; John A. Graham; Lucas M. Macri; Wendy L. Freedman; Shoko Sakai; Daniel D. Kelson; Shaun Hughes; Kim M. Sebo; Peter B. Stetson; Barry F. Madore; Robert C. Kennicutt; Garth D. Illingworth; Holland C. Ford; Brad K. Gibson; Nancy Ann Silbermann; Laura Ferrarese; John P. Huchra

Since the launch of the Hubble Space Telescope nine years ago, Cepheid distances to 25 galaxies have been determined for the purpose of calibrating secondary distance indicators. A variety of these can now be calibrated, and the accompanying papers by Sakai, Kelson, Ferrarese, and Gibson employ the full set of 25 galaxies to consider the Tully-Fisher relation, the fundamental plane of elliptical galaxies, Type Ia supernovae, and surface brightness fluctuations. nWhen calibrated with Cepheid distances, each of these methods yields a measurement of the Hubble constant and a corresponding measurement uncertainty. We combine these measurements in this paper, together with a model of the velocity field, to yield the best available estimate of the value of H_0 within the range of these secondary distance indicators and its uncertainty. nThe result is H_0 = 71 +/- 6 km/sec/Mpc. The largest contributor to the uncertainty of this 67% confidence level result is the distance of the Large Magellanic Cloud, which has been assumed to be 50 +/- 3 kpc.

Suzanne Gaudet; Peter Armstrong; Nicholas M. Ball; Edward L. Chapin; Patrick Dowler; Ian Gable; Sharon Goliath; Sebastien Fabbro; Laura Ferrarese; Stephen D. J. Gwyn; Nicholas Christopher Alexander Hill; David R. Jenkins; J. J. Kavelaars; Brian Major; John Ouellette; M Paterson; Michael T. Peddle; Chris Pritchet; David J. Schade; Randall Sobie; Damien Woods; Kristin Anne Woodley; Alexander Seeshing Yeung

Holland C. Ford; Laura Ferrarese; G. Hartig; W. Jaffe; Zlatan I. Tsvetanov; F. van den Bosch

Laura Ferrarese; Holland C. Ford; W. Jaffe; Frank C. van den Bosch; Robert W. O'Connell

Lisa Glass; Laura Ferrarese; Patrick Cote; Andres Jordan; Eric W. Peng; John P. Blakeslee; Chun-Houh Chen; Leopoldo Infante; Simona Mei; John L. Tonry; Michael J. West

Eric W. Peng; Laura Ferrarese; John P. Blakeslee; Patrick Cote; Patrick R. Durrell; John P. Huchra; Chris Mihos; Timothy C. Beers; Nicholas M. Ball; Stephane Courteau; Pierre-Alain Duc; Andres Jordan; Eric Emsellem; Ariane Lançon; Chengze Liu; Lauren A. MacArthur; Alan W. McConnachie; Dean E. McLaughlin; Thomas H. Puzia; Nelson Caldwell; Brian Yanny

Justice Bruursema; Holland C. Ford; Rupali Chandar; Roeland P. van der Marel; Jay Anderson; Julio Chaname; Laura Ferrarese; Ivan R. King; Carlton Pryor

Robert C. Kennicutt; Shoko Sakai; Laura Ferrarese; Abhijit Saha

Wendy L. Freedman; Barry F. Madore; Brad K. Gibson; Laura Ferrarese; Daniel D. Kelson; Shoko Sakai; Jeremy R. Mould; Robert C. Kennicutt; Holland C. Ford; John A. Graham; John P. Huchra; Shaun M. G. Hughes; Garth D. Illingworth; Lucas M. Macri; Peter B. Stetson

Shoko Sakai; Jeremy R. Mould; Shaun M. G. Hughes; John P. Huchra; Lucas M. Macri; Robert C. Kennicutt; Brad K. Gibson; Laura Ferrarese; Wendy L. Freedman; Mingsheng Han; Holland C. Ford; John A. Graham; Garth D. Illingworth; Daniel D. Kelson; Barry F. Madore; Kim M. Sebo; Nancy Ann Silbermann; Peter B. Stetson