J/A+A/370/765 HI synthesis observations in UMa cluster (Verheijen+, 2001)
The Ursa Major cluster of galaxies. IV. HI synthesis observations.
Verheijen M.A.W., Sancisi R.
<Astron. Astrophys. 370, 765 (2001)>
=2001A&A...370..765V 2001A&A...370..765V
ADC_Keywords: Clusters, galaxy ; H I data ; Galaxies, rotation ; Photometry
Keywords: galaxies: fundamental parameters - galaxies: kinematics and dynamics -
galaxies: spiral - galaxies: structure
Abstract:
In this data paper we present the results of an extensive 21 cm-line
synthesis imaging survey of 43 spiral galaxies in the nearby Ursa
Major cluster using the Westerbork Synthesis Radio Telescope. Detailed
kinematic information in the form of position-velocity diagrams and
rotation curves is presented in an atlas together with HI channel
maps, 21 cm continuum maps, global HI profiles, radial HI surface
density profiles, integrated HI column density maps, and HI velocity
fields. The relation between the corrected global HI linewidth and the
rotational velocities Vmax and Vflat as derived from the rotation
curves is investigated. Inclination angles obtained from the optical
axis ratios are compared to those derived from the inclined HI disks
and the HI velocity fields. The galaxies were not selected on the
basis of their HI content but solely on the basis of their cluster
membership and inclination which should be suitable for a kinematic
analysis. The observed galaxies provide a well-defined, volume limited
and equidistant sample, useful to investigate in detail the
statistical properties of the Tully-Fisher relation and the dark
matter halos around them.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 86 52 All galaxies in the UMa cluster brighter than
Mb,i(B)=-16.8 and more inclined than 45 degrees
table2.dat 92 52 Photometry of all galaxies in the UMa cluster
brighter than Mb,i(B)=-16.8 and more inclined
than 45 degrees
table3.dat 68 57 A comparison of the widths and integrated fluxes
from the present WSRT survey and from the
literature
table4.dat 48 437 Rotation curves derived from velocity fields
and XV-diagrams
table5.dat 104 43 Results from the HI synthesis observations
literature
--------------------------------------------------------------------------------
See also:
J/AJ/112/2471 : The Ursa Major cluster. I. (Tully+ 1996)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 A2 --- Sample Samples (G1)
4- 10 A7 --- Name Galaxy name (U for UGC, N for NGC)
11 A1 --- n_Name [fi] Note on the galaxy (2)
13- 14 I2 h RAh Right ascension (B1950)
16- 17 I2 min RAm Right ascension (B1950)
19- 22 F4.1 s RAs Right ascension (B1950)
24 A1 --- DE- Declination sign (B1950)
25- 26 I2 deg DEd Declination (B1950)
28- 29 I2 arcmin DEm Declination (B1950)
31- 32 I2 arcsec DEs Declination (B1950)
34- 39 F6.2 deg GLON Galactic longitude
41- 45 F5.2 deg GLAT Galactic latitude
47- 50 A4 --- MType Morphological type
52- 55 F4.2 arcmin D25(B) Observed major axis diameter of the
25th mag/arcsec2 blue isophote
57- 59 I3 deg PA Position angle of the receding side of the
galaxy (3)
61- 64 F4.2 --- 1-b/a Observed ellipticity of the optical galaxy image
66- 67 I2 deg iopt Inclination as derived from the observed axis
ratio (b/a).
69- 70 I2 deg iadopt Adopted inclination angle as derived from
several methods
72 I1 deg e_iadopt rms uncertainty on iadopt
74- 76 A3 --- SB Low (LSB) or high surface brightness (HSB)
galaxy, according to Paper II
78- 81 F4.2 mag [BH] Galactic extinction in the B-band according to
Burstein & Heiles (1984ApJS...54...33B 1984ApJS...54...33B)
83- 86 F4.2 mag [SFD] Galactic extinction in the B-band according to
Schlegel et al. (1998ApJ...500..525S 1998ApJ...500..525S)
--------------------------------------------------------------------------------
Note (2): There are 3 additional galaxies in the tables which do not meet the
luminosity (f) and inclination (i) criteria but happened to be in the
same WSRT fields as galaxies from the complete sample.
Note (3): For galaxies which are not observed or not detected in HI, this is the
smallest position angle of the major axis measured eastward from the
north.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 A2 --- Sample Samples (G1)
4- 10 A7 --- Name Galaxy name (U for UGC, N for NGC)
11 A1 --- n_Name [fi] Note on the galaxy (2)
13- 17 F5.2 mag Bmag Total B magnitude (3)
19- 23 F5.2 mag Rmag Total R magnitude (3)
25- 29 F5.2 mag Imag Total I magnitude (3)
31- 35 F5.2 mag K'mag ? Total K'mag magnitude (3)
37- 39 I3 km/s WHI ? Corrected HI line width at the 20% level,
used to calculate the internal extinction
41- 44 F4.2 mag AB Calculated internal extinction corrections in
the B passband (4)
46- 49 F4.2 mag AR Calculated internal extinction corrections in
the R passband (4)
51- 54 F4.2 mag AI Calculated internal extinction corrections in
the I passband (4)
56- 59 F4.2 mag AK' Calculated internal extinction corrections in
the K' passband (4)
61- 66 F6.2 mag BMAG Ttal absolute B magnitude (5)
68- 73 F6.2 mag RMAG Total absolute R magnitude (5)
75- 80 F6.2 mag IMAG Total absolute I magnitude (5)
82- 87 F6.2 mag K'MAG ? Total absolute K' magnitude (5)
89- 92 F4.2 arcmin D25 Diameter of the 25th mag/arcsec2 blue
isophote (6)
--------------------------------------------------------------------------------
Note (2): There are 3 additional galaxies in the tables which do not meet the
luminosity (f) and inclination (i) criteria but happened to be in the
same WSRT fields as galaxies from the complete sample.
Note (3): Total magnitudes form paper I (Tully et al., 1996AJ....112.2471T 1996AJ....112.2471T)
Note (4): Calculated internal extinction corrections toward face-on
Ai->0lambda according to Tully et al. (1998AJ....115.2264T 1998AJ....115.2264T):
Ai->0lambda = γλ*log(a/b)
where a/b is the observed axis ratio of the galaxy as an indication
of inclination while γλ depends on the luminosity and
is calculated according to:
γB = 1.57 + 2.75(logWiR,I - 2.5)
γR = 1.15 + 1.88(logWiR,I - 2.5)
γI = 0.92 + 1.63(logWiR,I - 2.5)
γK'= 0.22 + 0.40(logWiR,I - 2.5)
where WiR,I is the distance independent HI line width corrected
for instrumental resolution, corrected for turbulent motion according
to Tully & Fouqui (1985ApJS...58...67T 1985ApJS...58...67T) (TFq hereafter) with
Wt,20=22km/s as motivated in Sect. 4 and corrected for inclination
using iadopt from table1.
Note (5): Total absolute magnitudes corrected for Galactic and internal
extinction and a distance modulus of 31.35 corresponding to a
distance to the Ursa Major cluster of 18.6 Mpc
Note (6): Diameter corrected for both galactic and internal extinction and
projection
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- Name Galaxy name (U for UGC, N for NGC)
6- 10 A5 --- n_Name Note on Name (1)
12- 16 F5.1 km/s W20 HI line width at the 20% level, this work
18- 20 F3.1 km/s e_W20 rms uncertainty on W20
22- 25 F4.1 km/s Res Velocity resolution, this work
27- 31 F5.1 Jy.km/s Int Integrated flux, this work
33- 35 F3.1 Jy.km/s e_Int rms uncertainty on Int
37- 39 I3 km/s W20l ? HI line width at the 20% level, from Ref
40 A1 --- n_W20l [m?] Note on W20l (1)
42- 43 I2 km/s e_W20l ? rms uncertainty on W20l
45- 48 F4.1 km/s Resl ? Velocity resolution, from Ref
50- 54 F5.1 Jy.km/s Intl ? Integrated flux, from Ref
55 A1 --- n_Intl [?!] Note on Intl (1)
57- 60 F4.1 Jy.km/s e_Intl ? rms uncertainty on Intl
62- 63 I2 --- r_Intl ? References (2)
65- 68 A4 --- Obs Synthesis observation with the WRST or the VLA
--------------------------------------------------------------------------------
Note (1): Notes:
(c): the authors suggest possible confusion with a dwarf companion.
c: flagged by the authors as confused with near companion.
l: large correction factor (>1.20) applied for primary beam
flux attenuation.
i: flagged by the authors as possibly interacting.
noSD: no useful single dish profile available due to obvious confusion.
m: line width directly measured from the published HI profile.
!: the integrated flux as quoted by the author is a factor 2
larger than is quoted by any other source. Therefore, half the
integrated flux was adopted from this source.
Note (2): References:
1: Fisher & Tully (1981ApJS...47..139F 1981ApJS...47..139F)
2: Appleton & Davies (1982MNRAS.201.1073A 1982MNRAS.201.1073A)
3: Richter & Huchtmeier (1991A&AS...87..425R 1991A&AS...87..425R)
4: Oosterloo & Shostak (1993A&AS...99..379O 1993A&AS...99..379O)
5: Huchtmeier & Richter (1986A&AS...63..323H 1986A&AS...63..323H)
6: Schneider et al. (1992ApJS...81....5S 1992ApJS...81....5S)
7: Jore et al. (1996AJ....112..438J 1996AJ....112..438J)
8: Schwarz (1985A&A...142..273S 1985A&A...142..273S)
9: Thuan & Martin (1981ApJ...247..823T 1981ApJ...247..823T)
10: Magri (1994AJ....108..896M 1994AJ....108..896M)
11: Van der Burg (1987, Ph.D. Thesis, University of Groningen)
12: Gottesman et al. (1984ApJ...286..471G 1984ApJ...286..471G)
13: Van Moorsel (1983A&AS...54....1V 1983A&AS...54....1V)
14: Grewing & Mebold (1975A&A....42..119G 1975A&A....42..119G)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 A2 --- Sample [F X] Sample (1)
4- 8 A5 --- Name Galaxy name (N for NGC, U for UGC)
10- 12 I3 arcsec Rad Radius
14- 16 I3 km/s VrotApp ? Approaching rotation velocity
18- 20 I3 km/s VrotAppM ? Maximum value of approaching rotation velocity
22- 24 I3 km/s VrotAppm ? Minimum value of approaching rotation velocity
26- 28 I3 km/s VrotRec ? Receding rotation velocity
30- 32 I3 km/s VrotRecM ? Maximum value of receding rotation velocity
34- 36 I3 km/s VrotRecm ? Minimum value of receding rotation velocity
38- 40 I3 km/s Vrot ? Average rotational velocity
42- 44 I3 deg Incl Inclination
46- 48 I3 deg PA [13/381] Position angle
--------------------------------------------------------------------------------
Note (1): Samples:
FX: Rotation curves derived from velocity fields and XV-diagrams
X: Rotation curves derived from XV-diagrams only
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 A2 --- Sample [FPH] Sample (G1)
4- 8 A5 --- Name Galaxy name (N for NGC, U for UGC)
10- 14 F5.1 km/s W20 Uncorrected widths with formal errors of the
global profiles at 20% of the peak flux
16- 18 F3.1 km/s e_W20 rms uncertainty on W20
20- 24 F5.1 km/s W50 Uncorrected widths with formal errors of the
global profiles at 50% of the peak flux
26- 28 F3.1 km/s e_W50 rms uncertainty on W50
30- 33 F4.1 km/s Res Instrumental velocity resolution at which the
global profiles were observed
35- 40 F6.1 km/s HRV Heliocentric systemic velocity as derived from
the global profiles
42- 44 F3.1 km/s e_HRV rms uncertainty on HRV
46- 50 F5.1 Jy.km/s Int Integrated HI flux
52- 54 F3.1 Jy.km/s e_Int rms uncertainty on Int
56 A1 --- l_F21cm Limit flag on F21cm
57- 61 F5.1 mJy F21cm 21cm (1400MHz) continuum flux density (2)
63- 65 F3.1 mJy e_F21cm ? rms uncertainty on F21cm
67- 70 F4.2 arcmin RHI ? Radius of the HI disk (3)
72- 75 F4.2 arcmin Rlmp ? Radius of the last measured point of the
rotation curve (4)
77- 79 I3 km/s Vlmp ? Rotational velocity of the last measured
point
81- 82 I2 km/s e_Vlmp ? rms uncertainty on Vrot
84- 90 A7 --- Shape Information on the overall shape of the
rotation curve (5)
92- 94 I3 km/s Vmax ? Maximum observed rotational velocity (6)
96- 97 I2 km/s e_Vmax ? rms uncertainty on Vmax
99-101 I3 km/s Vflat ? Average rotational velocity of the flat part
of the rotation curve (7)
103-104 I2 km/s e_Vflat ? rms uncertainty on Vflat
--------------------------------------------------------------------------------
Note (2): In case no continuum flux was detected, a 3σ upper limit
for extended emission is given.
Note (3): Radius at the azimuthally averaged surface density of 1M_☉/pc2,
measured from the radial surface density profiles.
Note (4): The differences between Rlmp and RHI depend on the sensitivity
of the measurement and the distribution of the HI gas along the
kinematic major axis.
Note (5): Overal shape of the rotation curve:
R: rising rotation curve
F: the rotation curve shows a flat part
D: the rotation curve shows a declining part
L: lopsided
Note (6): For galaxies with a rising rotation curve (R) Vmax=Vlmp
Note (7): For galaxies with a flat rotation curve (F) Vflat=Vmax may deviate
from Vlmp because V_flat was averaged over the flat part of the
rotation curve while Vlmp was measured at a single point.
--------------------------------------------------------------------------------
Global Notes:
Note (G1): the sample values are:
FH: Galaxies with fully analyzed HI data
PH: Galaxies with partially analyzed HI data
CH: Galaxies with confused HI data
NH: Not observed or too little HI content
History:
From electronic version of the journal
References:
Tully et al., Paper I 1996AJ....112.2471T 1996AJ....112.2471T, Cat. J/AJ/112/2471
Tully & Verheijen, Paper II 1997ApJ...484..145T 1997ApJ...484..145T
(End) Patricia Bauer [CDS] 05-Jun-2001