J/MNRAS/428/1790 HIJASS HI survey in the Ursa Major region (Wolfinger+, 2013)
A blind HI survey in the Ursa Major region.
Wolfinger K., Kilborn V.A., Koribalski B.S., Minchin R.F., Boyce P.J.,
Disney M.J., Lang R.H., Jordan C.A.
<Mon. Not. R. Astron. Soc., 428, 1790-1817 (2013)>
=2013MNRAS.428.1790W 2013MNRAS.428.1790W
ADC_Keywords: Surveys ; Radio sources ; H I data
Keywords: catalogues - surveys - galaxies: fundamental parameters
Abstract:
We have conducted the first blind HI survey covering 480deg2 and a
heliocentric velocity range from 300 to 1900km/s to investigate the HI
content of the nearby spiral-rich Ursa Major region and to look for
previously uncatalogued gas-rich objects. Here we present the
catalogue of HI sources. The HI data were obtained with the four-beam
receiver mounted on the 76.2-m Lovell telescope [full width at
half-maximum (FWHM) 12-arcmin] at the Jodrell Bank Observatory (UK) as
part of the HI Jodrell All Sky Survey (HIJASS). We use the automated
source finder DUCHAMP and identify 166 HI sources in the data cubes
with HI masses in the range of 107-1010.5M☉. Our Ursa Major HI
catalogue includes 10 first-time detections in the 21-cm emission
line.
We identify optical counterparts for 165 HI sources (99%). For 54 HI
sources (∼33%) we find numerous optical counterparts in the
HIJASS beam, indicating a high density of galaxies and likely tidal
interactions. Four of these HI systems are discussed in detail.
We find only one HI source (1%) without a visible optical counterpart
out of the 166 HI detections. Green Bank Telescope (FWHM 9-arcmin)
follow-up observations confirmed this HI source and its HI properties.
The nature of this detection is discussed and compared to similar
sources in other HI surveys.
Description:
The HI data cubes analysed in this paper were obtained in 2001-2002 as
part of the HIJASS (Lang et al., 2003, Cat. J/MNRAS/342/738). The
blind HI survey was conducted using the four-beam receiver mounted on
the 76.2-m Lovell telescope at Jodrell Bank Observatory, UK.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 123 250 The HIJASS detections with optical counterparts
within the gridded beam size
table3.dat 92 166 The HI properties of all HIJASS detections
table4.dat 65 10 The HI properties of newly detected HI sources
as measured with the Green Bank Telescope
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See also:
J/AJ/105/226 : UMa Group (Soderblom+ 1993)
J/A+A/370/765 : HI synthesis observations in UMa cluster (Verheijen+, 2001)
J/PAZh/27/170 : BR photometry of the UMa galaxy supercluster (Kopylov+, 2001)
J/PAZh/27/403 : CCD R photometry in the UMa supercluster (Kopylova+, 2001)
J/MNRAS/342/738 : HI Jodrell All Sky Survey (Lang+, 2003)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- --- [HIJASS]
8- 16 A9 --- HIJASS HIJASS designation (JHHMM+DDA)
17 A1 --- n_HIJASS [g] Consistent with HIJASS 2003 (1)
19- 20 I2 h RAh Right ascension (J2000)
22- 23 I2 min RAm Right ascension (J2000)
25- 29 F5.2 s RAs Right ascension (J2000)
31 A1 --- DE- Declination sign (J2000)
32- 33 I2 deg DEd Declination (J2000)
35- 36 I2 arcmin DEm Declination (J2000)
38- 41 F4.1 arcsec DEs Declination (J2000)
43- 45 F3.1 arcmin ePos Uncertainty on position
47- 50 I4 km/s Vsys Systemic velocity
52- 53 I2 km/s e_Vsys rms uncertainty on Vsys
55- 57 A3 --- St [ID PUO] State (ID for HI detections that
have an optical identification, PUO for the
previously uncatalogued gas-rich object)
58 A1 --- n_St [ef] redshift available (1)
60- 83 A24 --- OName Name of optical counterpart (2)
85 A1 --- n_OName [cd] Note on OName (1)
87- 88 I2 h RAOh ? Optical right ascension (J2000)
90- 91 I2 min RAOm ? Optical right ascension (J2000)
93- 97 F5.2 s RAOs ? Optical right ascension (J2000)
99 A1 --- DEO- ? Optical declination sign (J2000)
100-101 I2 deg DEOd ? Optical declination (J2000)
103-104 I2 arcmin DEOm ? Optical declination (J2000)
106-109 F4.1 arcsec DEOs ? Optical declination (J2000)
111-114 I4 km/s HV ? Heliocentric velocity
116-119 F4.1 arcmin Sep ? Angular separation radio/optical
121-123 I3 km/s Voff ? Velocity offset from the HI parameters
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Note (1): Notes as follows:
c = 2MASX objects with full identifications of the form:
2MASXY, where Y is the stated ID
d = MAPS-NGP object with full identification of the form:
MAPS-NGP Z, where Z is the stated ID
e = Redshift information available in SDSS DR8 (Aihara et al.,
2011ApJS..193...29A 2011ApJS..193...29A) - not listed in NED
f = Redshift information available in ALFALFA (Haynes et al. 2011,
Cat. J/AJ/142/170) - not listed in NED
g = HIJASS name consistent with Lang et al. (2003, Cat. J/MNRAS/342/738)
Note (2): most likely counterpart of a HIJASS source is given in the first row.
Potentially confused HIJASS sources, with multiple galaxies within the
gridded beam or the HI intensity contours (for large sources) and within
the velocity range of the HI detection, are listed in the subsequent rows.
Unless stated differently, identifications starting with 'J' are SDSS
galaxies and their full names are of the form: SDSS X, where X is the
stated ID.
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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- 6 A6 --- --- [HIJASS]
8- 16 A9 --- HIJASS HIJASS designation (JHHMM+DDA)
18- 22 F5.3 Jy Sp Measured peak flux density at 21cm
24- 28 F5.3 Jy Spc ?=- Corrected peak flux density at 21cm
30- 34 F5.3 Jy e_Sp rms uncertainty on Sp
36- 41 F6.2 Jy.km/s Sint Measured integrated flux at 21cm
44- 49 F6.2 Jy.km/s Sintc ?=- Corrected integrated flux at 21cm
51- 55 F5.2 Jy.km/s e_Sint rms uncertainty on Sint
57- 59 I3 km/s W50 Velocity width at 50% of the peak flux
61- 62 I2 km/s e_W50 rms uncertainty on W50
64- 66 I3 km/s W20 Velocity width at 20% of the peak flux
68- 69 I2 km/s e_W20 rms uncertainty on W20
71- 75 F5.3 Jy rms Clipped rms measured in MBSPECT
77- 80 F4.1 Mpc Dist Distance to the galaxy (1)
82- 86 F5.2 [Msun] logMHI HI mass
88- 92 A5 --- Flags Flags (2)
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Note (1): as obtained from the Extragalactic Distance Database (EDD; Tully et
al. 2009AJ....138..323T 2009AJ....138..323T - only distances obtained from colour-magnitude
diagrams, tip of the red giant branch and other high-quality methods are
considered) or calculated from the Local Group velocity (see Koribalski
et al. 2004 (Cat. J/AJ/128/16) for HIPASS) - we adopt H0=70km/s/Mpc;
for galaxies within the cluster definition by Tully et al.
(1996, Cat. J/AJ/112.2471) we adopt a distance of 17.1Mpc.
Note (2): Flags are (numbers indicate HI sources with higher order baseline
fits to their spectra):
e = extended HI source
c = confused HI source
f = HI source without a central position from a position fit
n = newly detected sources in the 21-cm emission line
b = HI sources lying nearby negative bandpass sidelobes
d = DUCHAMP double detections
v = HI source with systemic velocities below 300km/s
i = source with independent distance measurements available
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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- 6 A6 --- --- [HIJASS]
8- 16 A9 --- HIJASS HIJASS designation (JHHMM+DDA)
18- 21 I4 km/s Vsys Systemic velocity
23 I1 km/s e_Vsys rms uncertainty on Vsys
25- 29 F5.3 Jy Sp Measured peak flux density at 21cm
31- 35 F5.3 Jy e_Sp rms uncertainty on Sp
37- 40 F4.2 Jy.km/s Sint Measured integrated flux at 21cm
42- 45 F4.2 Jy.km/s e_Sint rms uncertainty on Sint
47- 49 I3 km/s W50 Velocity width at 50% of the peak flux
51- 52 I2 km/s e_W50 rms uncertainty on W50
54- 56 I3 km/s W20 Velocity width at 20% of the peak flux
58- 59 I2 km/s e_W20 rms uncertainty on W20
61- 65 F5.3 Jy rms Clipped rms measured in MBSPECT
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 31-Jan-2014