Cosmicflows-4: The Catalog of ~10000 Tully-Fisher Distances
Abstract
We present the distances of 9792 spiral galaxies lying within 15,000 km/s using the relation between luminosity and rotation rate of spiral galaxies. The sample is dominantly, but not exclusively, drawn from galaxies detected in the course of the ALFALFA HI survey with the Arecibo Telescope. Relations between \hi line widths and luminosity are calibrated at SDSS u, g, r, i, z bands and WISE W1 and W2 bands. By exploiting secondary parameters, particularly color indices, we address discrepancies between measured distances at different wave bands with unprecedented detail. We provide a catalog that includes reduced kinematic, photometric, and inclination parameters. We also describe a machine learning algorithm, based on the random forest technique that predicts the dust attenuation in spirals lacking infrared photometry. We determine a Hubble Constant value of H0 = 75.1+-0.2 (stat.), with potential systematics up to +-3 km/s/Mpc.
Keywords
Cite
@article{arxiv.2009.00733,
title = {Cosmicflows-4: The Catalog of ~10000 Tully-Fisher Distances},
author = {Ehsan Kourkchi and R. Brent Tully and Sarah Eftekharzadeh and Jordan Llop and Helene M. Courtois and Daniel Guinet and Alexandra Dupuy and James D. Neill and Mark Seibert and Michael Andrews and Juana Chuang and Arash Danesh and Randy Gonzalez and Alexandria Holthaus and Amber Mokelke and Devin Schoen and Chase Urasaki},
journal= {arXiv preprint arXiv:2009.00733},
year = {2020}
}
Comments
46 pages, 46 figures, and 5 tables. Accepted for publication in The Astrophysical Journal