J/AJ/157/194 Total ALFALFA H I fluxes for extended sources (Hoffman+, 2019)
Total ALFALFA neutral hydrogen fluxes for extended sources.
Hoffman G.L., Dowell J., Haynes M.P., Giovanelli R.
<Astron. J., 157, 194 (2019)>
=2019AJ....157..194H 2019AJ....157..194H (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, radio ; H I data ; Intergalactic medium ; Redshifts
Keywords: galaxies: irregular - galaxies: spiral - intergalactic medium -
radio lines: galaxies
Abstract:
A procedure is presented to improve on measurement of total H I fluxes
for extended sources in the Arecibo Legacy Fast Arecibo L-band Feed Array
(ALFALFA) survey of neutral hydrogen sources in the nearby universe.
A number of tests of the procedure are detailed, and we verify that we
recover all of the flux measured with much larger telescope beams.
Total fluxes are reported for all sources (1) exceeding 10 Jy km/s in the
α.100 catalog (Haynes et al. 2018ApJ...861...49H 2018ApJ...861...49H), or (2) with
Uppsala General Catalog (Cat. VII/26) diameters 3.0 arcmin or more, or
(3) ALFALFA pipeline isophotal ellipse area more than 3.0 times the
Arecibo beam. Total fluxes are also provided for a number of confused
pairs and small groups including one or more of those high-flux
sources. These data should be of use in baryonic Tully-Fisher studies
and other applications where the measurement of the total reservoir of
neutral atomic gas is important.
Description:
ALFALFA is a drift-scan survey using the seven-beam Arecibo L-band
Feed Array (ALFA). Observations were started in 2005 February and were
completed in 2012 October. Reduction of the data is now complete. The
full survey covers about 7000 deg2 over a redshift range of about
-2000<cz<18000 km/s and has cataloged more than 30000 galaxies. The final
data products consist of "grids" or data cubes spanning 144x144' on the sky
and about 5300 km/s in cz (heliocentric). The ALFALFA pipeline procedure
(GalFlux4.pro) for measuring hydrogen fluxes, systemic redshifts, and
profile widths was optimized to give the most reliable profile widths and
highest S/N measurements of total neutral hydrogen fluxes of unresolved
sources (Haynes et al. 2011, J/AJ/142/170; 2018ApJ...861...49H 2018ApJ...861...49H).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 87 778 Total HI fluxes for large angular diameter
galaxies
table2.dat 87 260 HI fluxes to supercede ALFALFA pipeline fluxes
table3.dat 72 112 HI fluxes for blended pairs and groups
notes.dat 365 293 Notes concerning individual objects
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See also:
VII/26 : Uppsala General Catalogue of Galaxies (UGC) (Nilson 1973)
VIII/77 : HI spectral properties of galaxies (Springob+, 2005)
J/AJ/138/338 : Arecibo Legacy Fast ALFA Survey. IX. (Stierwalt+, 2009)
J/AJ/142/170 : ALFALFA survey: the α.40 HI source catalog (Haynes+, 2011)
Byte-by-byte Description of file: table1.dat table2.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- AGC [8/749072] Galaxy's number in the Arecibo General
Catalog (AGC), identical to the Uppsala General
Catalog (UGC) number for those less than 13000
8- 17 A10 --- Name Name in prior catalogs (either from the NGC/IC
or Zwicky's CGCG)
19- 26 F8.4 deg RAdeg Right Ascension of HI centroid (J2000)
28- 34 F7.4 deg DEdeg Declination of HI centroid (J2000)
36- 40 I5 km/s cz [-302/16456] Redshift multiplied by the speed
of light
42- 45 F4.1 arcmin a(UGC) [0/73] Major diameter in the UGC
47- 51 F5.1 --- HIsize [0/173.3] Isophotal ellipse area divided by beam
size
53- 61 F9.2 Jy.km/s Spoly [0/104422] HI flux integrated within the
circumscribed polygon
63- 66 F4.2 Jy.km/s Serr [0/1.2]? Flux error due to baseline noise
(only in Table 1)
68- 73 F6.2 Jy.km/s Spipe [0.2/461.13]? Flux measured by the ALFALFA
pipeline (only in Table 1)
75- 79 F5.1 Mpc Dist [0.7/141.2]? Distance (only in Table 2)
81- 85 F5.2 [Msun] logMH [6.65/10.73]? log10 of HI mass (only in Table 2)
87 A1 --- Note [*] Indicator of a note in notes.dat file
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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- 52 A52 --- AGC AGC numbers for group members
54- 60 F7.2 Jy.km/s Spoly [2.68/1022.79] HI flux integrated within
the circumscribed polygon
62- 66 F5.1 Mpc Dist [7.8/168.1] Distance
68- 72 F5.2 [Msun] logMH [8.42/10.91] log10 of HI mass
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- AGC [16/749072] Galaxy's number in the AGC database
(identical to the UGC number for those less than
13000)
8-365 A358 --- Note Text of note
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History:
From electronic version of the journal
(End) Prepared by [AAS], Tiphaine Pouvreau [CDS] 05-Aug-2019