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Title:
SFI++. II. A New I-Band Tully-Fisher Catalog, Derivation of Peculiar Velocities, and Data Set Properties [ Erratum: 2009ApJS..182..474S ]
Authors:
Springob, Christopher M.; Masters, Karen L.; Haynes, Martha P.; Giovanelli, Riccardo; Marinoni, Christian
Affiliation:
AA(Naval Research Laboratory, Remote Sensing Division, Code 7213, 4555 Overlook Avenue, SW, Washington, DC 20375; .; National Research Council Postdoctoral Fellow.; Center for Radiophysics and Space Research, Cornell University, Space Sciences Building, Ithaca, NY 14853; , .), AB(Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138; .; Center for Radiophysics and Space Research, Cornell University, Space Sciences Building, Ithaca, NY 14853; , .), AC(Center for Radiophysics and Space Research, Cornell University, Space Sciences Building, Ithaca, NY 14853; , .; National Astronomy and Ionosphere Center, Cornell University, Ithaca, NY 14853. The National Astronomy and Ionosphere Center is operated by Cornell University under a cooperative agreement with the National Science Foundation.), AD(Center for Radiophysics and Space Research, Cornell University, Space Sciences Building, Ithaca, NY 14853; , .; National Astronomy and Ionosphere Center, Cornell University, Ithaca, NY 14853. The National Astronomy and Ionosphere Center is operated by Cornell University under a cooperative agreement with the National Science Foundation.), AE(Centre de Physique Theorique, UMR 6207 CNRS, Université de Provence, case 907, 13288 Marseille, France; .)
Publication:
The Astrophysical Journal Supplement Series, Volume 172, Issue 2, pp. 599-614. (ApJS Homepage)
Publication Date:
10/2007
Origin:
UCP
ApJ Keywords:
Astronomical Data Bases: Miscellaneous, Galaxies: Distances and Redshifts, Galaxies: Fundamental Parameters, Cosmology: Large-Scale Structure of Universe
DOI:
10.1086/519527
Bibliographic Code:
2007ApJS..172..599S

Abstract

We present the SFI++ data set, a homogeneously derived catalog of photometric and rotational properties and the Tully-Fisher distances and peculiar velocities derived from them. We make use of digital optical images, optical long-slit spectra, and global H I line profiles to extract parameters of relevance to disk scaling relations, incorporating several previously published data sets as well as a new photometric sample of some 2000 objects. According to the completeness of available redshift samples over the sky area, we exploit both a modified percolation algorithm and the Voronoi-Delaunay method to assign individual galaxies to groups as well as clusters, thereby reducing scatter introduced by local orbital motions. We also provide corrections to the peculiar velocities for both homogeneous and inhomogeneous Malmquist bias, making use of the 2MASS Redshift Survey density field to approximate large-scale structure. We summarize the sample selection criteria, corrections made to raw observational parameters, the grouping techniques, and our procedure for deriving peculiar velocities. The final SFI++ peculiar velocity catalog of 4861 field and cluster galaxies is large enough to permit the study not just of the global statistics of large-scale flows but also of the details of the local velocity field.

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