Tuesday 7/30/13

Hmm. Not much today. Maybe a good one to know exists is Tully et al., who compile distances and velocities to 8000 galaxies, in as uniform way as possible….

Title: Cosmicflows-2: The Data
Authors: Tully, R. Brent; Courtois, Helene M.; Dolphin, Andrew E.; Fisher, J. Richard; Heraudeau, Philippe; Jacobs, Bradley A.; Karachentsev, Igor D.; Makarov, Dmitry; Makarova, Lidia;Mitronova, Sofia; Rizzi, Luca; Shaya, Edward J.; Sorce, Jenny G.; Wu, Po-Feng
Publication: eprint arXiv:1307.7213
Publication Date: 07/2013
Origin: ARXIV
Keywords: Astrophysics – Cosmology and Extragalactic Astrophysics
Comment: To be published in Astronomical Journal. Two extensive tables to be available on-line. Table 1 available at http://edd.ifa.hawaii.edu select catalog `Cosmicflows-2 Distances’
Bibliographic Code: 2013arXiv1307.7213T

Abstract

Cosmicflows-2 is a compilation of distances and peculiar velocities for over 8000 galaxies. Numerically the largest contributions come from the luminosity-linewidth correlation for spirals, the TFR, and the related Fundamental Plane relation for E/S0 systems, but over 1000 distances are contributed by methods that provide more accurate individual distances: Cepheid, Tip of the Red Giant Branch, Surface Brightness Fluctuation, SNIa, and several miscellaneous but accurate procedures. Our collaboration is making important contributions to two of these inputs: Tip of the Red Giant Branch and TFR. A large body of new distance material is presented. In addition, an effort is made to assure that all the contributions, our own and those from the literature, are on the same scale. Overall, the distances are found to be compatible with a Hubble Constant H_0 = 74.4 +-3.0 km/s/Mpc. The great interest going forward with this data set will be with velocity field studies. Cosmicflows-2 is characterized by a great density and high accuracy of distance measures locally, falling to sparse and coarse sampling extending to z=0.1.

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