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3D Velocity and Density Reconstructions of the Local Universe with Cosmicflows-1
Helene M. Courtois, Yehuda Hoffman, R. Brent Tully +1
This paper presents an analysis of the local peculiar velocity field based on the Wiener Filter reconstruction method. We used our currently available catalog of distance measureme…
Fast motions of galaxies in the Coma I cloud: a case of Dark Attractor?
Igor D. Karachentsev, Olga G. Nasonova, Helene M. Courtois
We notice that nearby galaxies having high negative peculiar velocities are distributed over the sky very inhomogeneously. A part of this anisotropy is caused by the "Local Velocit…
Cosmic Flows: Univ. Hawaii 2.2m I-band Photometry
Helene M. Courtois, R. Brent Tully, Philippe Heraudeau
Within the "Cosmic Flows" project, I-band photometry of 524 relatively nearby galaxies has been carried out over the course of several years with the University of Hawaii 2.2m tele…
Cosmic Flows : Green Bank and Parkes HI observations
Helene M. Courtois, R. Brent Tully, D. I. Makarov +4
The neutral hydrogen properties of 1,822 galaxies are being studied with the Green Bank 100m and the Parkes 64m telescopes as part of the 'Cosmic Flows' program. Observed parameter…