J/A+A/646/A113 Towards Cosmicflows-4 HI data catalog (Dupuy+, 2021)
Towards Cosmicflows-4: The HI data catalog.
Dupuy A., Courtois H.M., Guinet D., Tully R.B., Kourkchi E.
<Astron. Astrophys. 646, A113 (2021)>
=2021A&A...646A.113D 2021A&A...646A.113D (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, radio ; H I data
Keywords: methods: observational - line: profiles - catalogs -
galaxies: distances and redshifts
Abstract:
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.
We conducted observations at the Green Bank telescope (GBT) and
reprocessed spectra obtained at the Nancay radiotelescope by the
Nancay Interstellar Baryons Legacy Extragalactic Survey (NIBLES) and
Kinematics of the Local Universe (KLUN) 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.
This paper adds new HI data adequate for TF use for 385 galaxies
observed at GBT, 889 galaxies from archival Nancay 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. This paper adds new HI
data adequate for TF use for 385 galaxies observed at GBT, 889
galaxies from archival Nancay 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
18874 galaxies, for which 15433 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.
Description:
Compilation of line width measurements. We obtained a total of 889
measurements adequate for TF use after reprocessing data from the
NIBLES and KLUN collaborations. Observations conducted at the GBT
allowed to compile 628 new measurements of the line width, of which
685 are adequate for distance measurements with the TF method.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 63 628 Raw HI parameters measured on GBT spectra
table3.dat 130 628 HI profiles and PanSTARRS images of GBT targets
table4.dat 32 1274 Newly observed and reprocessed HI measurements
img/* . 628 Individual HI profiles images
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See also:
http://leda.univ-lyon1.fr : LEDA Home Page
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 7 I7 --- PGC PGC number
9- 18 A10 --- Name Alternative name (1)
20- 24 I5 km/s Vhel Input heliocentric velocity (1)
26- 30 I5 km/s v50 Velocity measured on the profile
32- 35 I4 km/s W50 Raw line width
37- 39 I3 km/s e_W50 Error on line width
41- 44 F4.1 --- S/N Signal-to-noise ratio
46- 51 F6.2 Jy.km/s Flux Flux HI line flux
53- 57 F5.2 deg incl ? Galaxy inclination (1)
59- 63 F5.2 mag Bmag ?=- Total B-band magnitude (1)
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Note (1): extracted from LEDA (Makarov et al. 2014, http://leda.univ-lyon1.fr)
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 7 I7 --- PGC PGC number
9- 13 I5 km/s Vhel Velocity measured on the profile
15- 18 I4 km/s W50 Raw line width
20- 22 I3 km/s e_W50 Error on line width
24- 60 A37 --- Profile HI profile in subdirectory img (1)
62-130 A69 --- PanSTARRS Link to PanSTARRS images (2)
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Note (1): HI profile after the measurement of the line width. In the case of
non-detection (e_W50=500km/s), the raw spectra obtained from the GBT is shown.
Note (2): composite of the bands y/i/g + images in bands g, r, i, z and y.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 7 I7 --- PGC PGC number
9- 14 A6 --- Tel Telescope used to obtain HI spectra
16- 20 I5 km/s Vhel Heliocentric velocity
22- 24 I3 km/s Wmx Corrected line width
26- 27 I2 km/s e_Wmx Error on line width
29- 32 F4.1 --- S/N Signal-to-noise ratio
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Acknowledgements:
Alexandra Dupuy, dupuy(at)ipnl.in2p3.fr
(End) Patricia Vannier [CDS] 06-Jan-2021