| Issue |
A&A
Volume 646, February 2021
|
|
|---|---|---|
| Article Number | A113 | |
| Number of page(s) | 9 | |
| Section | Catalogs and data | |
| DOI | https://doi.org/10.1051/0004-6361/202039025 | |
| Published online | 16 February 2021 | |
Toward Cosmicflows-4: The HI data catalog⋆
1
University of Lyon, UCB Lyon 1, CNRS/IN2P3, IUF, IP2I Lyon, UMR5822, 69622 Villeurbanne Cedex, France
e-mail: dupuy@ipnl.in2p3.fr
2
Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USA
Received:
24
July
2020
Accepted:
17
December
2020
Aims. In this study, we present an update of a compilation of line width measurements of neutral atomic hydrogen (HI) galaxy spectra at 21 cm wavelength. Our All Digital HI (ADHI) catalog consists of the previous release augmented with our new HI observations and an analysis of archival data. This study provides the required HI information to measure the distances of spiral galaxies through the application of the Tully-Fisher (TF) relation.
Methods. We conducted observations at the Green Bank telescope (GBT) and reprocessed spectra obtained at the Nançay radiotelescope by the Nançay Interstellar Baryons Legacy Extragalactic Survey and Kinematics of the Local Universe collaborations and we analyzed the recently published full completion Arecibo Legacy Fast ALFA (ALFALFA) 100% survey in order to identify galaxies with good quality HI line width measurements.
Results. This paper adds new HI data adequate for TF use for 385 galaxies observed at GBT, 889 galaxies from archival Nançay spectra, and 1515 rescaled Arecibo ALFALFA spectra. In total, this release adds 1274 new good quality measurements to the ADHI catalog. Today, the ADHI database contains 18 874 galaxies, for which 15 433 have good quality data for TF use. The final goal is to compute accurate distances to spiral galaxies, which will be included in the next generation of peculiar velocities catalog: Cosmicflows-4.
Key words: methods: observational / line: profiles / catalogs / galaxies: distances and redshifts
Tables 2–4 are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/cat/J/A+A/646/A113
© A. Dupuy et al. 2021
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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