J/MNRAS/457/2366 Southern ZOA galaxies 21cm HI-line (Said+, 2016)
NIR Tully-Fisher in the Zone of Avoidance.
II. 21 cm H I-line spectra of southern ZOA galaxies.
Said K., Kraan-Korteweg R.C., Staveley-Smith L., Williams W.L.,
Jarrett T.H., Springob C.M.
<Mon. Not. R. Astron. Soc., 457, 2366-2376 (2016)>
=2016MNRAS.457.2366S 2016MNRAS.457.2366S (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, radio ; H I data ; Redshifts
Keywords: galaxies: distances and redshifts - galaxies: spiral -
cosmology: observations - large-scale structure of Universe -
infrared: galaxies - radio lines: galaxies
Abstract:
High-accuracy HI profiles and linewidths are presented for inclined
((b/a)o<0.5) spiral galaxies in the southern Zone of Avoidance
(ZOA). These galaxies define a sample for use in the determinations of
peculiar velocities using the near-infrared Tully-Fisher (TF)
relation. The sample is based on the 394 HI-selected galaxies from the
Parkes HI Zone of Avoidance survey (HIZOA). Follow-up narrow-band
Parkes HI observations were obtained in 2010 and 2015 for 290
galaxies, while for the further 104 galaxies, sufficiently high
signal-to-noise (S/N) spectra were available from the original HIZOA
data. All 394 spectra are reduced and parametrized in the same
systematic way. Five different types of linewidth measurements were
derived, and a Bayesian mixture model was used to derive conversion
equations between these five widths. Of the selected and measure
galaxies, 342 have adequate signal to noise (S/N≥5) for use in TF
distance estimation. The average value of the S/N ratio of the sample
is 14.7. We present the HI parameters for these galaxies. The sample
will allow a more accurate determination of the flow field in the
southern ZOA which bisects dynamically important large-scale
structures such as Puppis, the Great Attractor, and the Local Void.
Description:
Data were collected in 2010 and 2015 using the 21cm MB receiver on the
64-m Parkes Radio Telescope in narrow-band mode, using only the
high-efficiency seven inner beams. Beam-switching mode allows one beam
ON the source and the other six OFF source, which reduces the noise by
a factor of 2. Each target was observed for at least 35 min of
ON-source integration time, with the 8MHz bandwidth split into 1024
channels. This results in a velocity resolution of 1.6km/s.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 155 103 HI derived parameters for the good HIZOA
profiles (velocity resolution of 27km/s)
table3.dat 156 237 HI derived parameters for the narrow-band
profiles (velocity resolution of 3.3km/s)
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See also:
J/AJ/129/220 : HI Parkes Zone of Avoidance Survey (Donley+, 2005)
J/AJ/151/52 : The HIZOA-S survey (Staveley-Smith+, 2016)
J/MNRAS/462/3386 : Deep NIR catalogue ofHIZOA galaxies (Said+, 2016)
Byte-by-byte Description of file: table2.dat table3.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- HIZOA HIZOA designation (JHHMM-DDA) (1)
11- 12 I2 h RAh Right ascension (J2000) of the fitted
position in HIZOA
14- 15 I2 min RAm Right ascension (J2000) of the fitted
position in HIZOA
17- 21 F5.2 s RAs Right ascension (J2000) of the fitted
position in HIZOA
23 A1 --- DE- Declination sign (J2000) of the fitted
position in HIZOA
24- 25 I2 deg DEd Declination (J2000) of the fitted
position in HIZOA
27- 28 I2 arcmin DEm Declination (J2000) of the fitted
position in HIZOA
30- 33 F4.1 arcsec DEs Declination (J2000) of the fitted
position in HIZOA
35- 42 F8.4 deg GLON Galactic longitude
44- 51 F8.4 deg GLAT Galactic latitude
53- 57 F5.1 Jy.km/s IFHI Integrated HI flux
59- 61 F3.1 Jy.km/s e_IFHI rms uncertainty on IFHI
63- 70 F8.2 km/s HV Heliocentric velocity measured as the
mid-point of the 50 per cent of the profile
using the WF50 algorithm
72- 76 F5.2 km/s e_HV rms uncertainty on HV
78- 84 F7.3 --- WP20 Linewidth at 20 per cent of the peak flux-rms
86- 91 F6.2 --- e_WP20 rms uncertainty on WP20
93- 98 F6.2 --- WM50 Linewidth at 50 per cent of the mean flux
100-104 F5.2 --- e_WM50 rms uncertainty on WM50
106-111 F6.2 --- WP50 Linewidth at 50 per cent of the peak flux-rms
113-118 F6.2 --- e_WP50 rms uncertainty on WP50
120-125 F6.2 --- WF50 Linewidth at 50 per cent of the peak flux-rms
measured with a polynomial fit to both sides
of the profile
127-131 F5.2 --- e_WF50 rms uncertainty on WF50
133-138 F6.2 --- W2P50 Linewidth at 50 per cent of the peak flux-rms
measured at each of the two peaks
140-144 F5.2 --- e_W2P50 rms uncertainty on W2P50
146-149 F4.1 mJy rms rms noise
151-156 F6.2 --- SNR S/N ratio
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Note (1): HIZOA ID as reported in the HIZOA survey publications
(Donley et al. 2005, Cat. J/AJ/129/220; Staveley-Smith et al. 2016,
Cat. J/AJ/151/52; Kraan-Korteweg et al., in preparation).
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History:
From electronic version of the journal
References:
Said et al., Paper I 2015MNRAS.447.1618S 2015MNRAS.447.1618S
Said et al., Paper III 2016MNRAS.462.3386S 2016MNRAS.462.3386S, Cat. J/MNRAS/462/3386
(End) Patricia Vannier [CDS] 27-Jul-2017