J/ApJ/716/198 The DiskMass survey. I. (Bershady+, 2010)
The DiskMass survey.
I. Overview.
Bershady M.A., Verheijen M.A.W., Swaters R.A., Andersen D.R.,
Westfall K.B., Martinsson T.
<Astrophys. J., 716, 198-233 (2010)>
=2010ApJ...716..198B 2010ApJ...716..198B
ADC_Keywords: Galaxies, nearby ; Surveys
Keywords: dark matter - galaxies: evolution - galaxies: formation -
galaxies: fundamental parameters - galaxies: halos -
galaxies: kinematics and dynamics - galaxies: spiral -
galaxies: stellar content - galaxies: structure
Abstract:
We present a survey of the mass surface density of spiral disks,
motivated by outstanding uncertainties in rotation-curve
decompositions. Our method exploits integral-field spectroscopy to
measure stellar and gas kinematics in nearly face-on galaxies sampled
at 515, 660, and 860nm, using the custom-built SparsePak and PPak
instruments. A two-tiered sample, selected from the UGC, includes 146
nearly face-on galaxies, with B<14.7 and disk scale lengths between
10 and 20 arcsec, for which we have obtained Hα velocity fields;
and a representative 46 galaxy subset for which we have obtained
stellar velocities and velocity dispersions. The survey is augmented
by 4-70um Spitzer IRAC and MIPS photometry, ground-based UBVRIJHK
photometry, and HI aperture-synthesis imaging. We outline the
spectroscopic analysis protocol for deriving precise and accurate
line-of-sight stellar velocity dispersions. Our key measurement is the
dynamical disk-mass surface density. Star formation rates and
kinematic and photometric regularity of galaxy disks are also central
products of the study.
Description:
Hα kinematic data were taken with the SparsePak integral-field
unit (IFU) on the WIYN 3.5m telescope. We observed 137 galaxies over
13 runs from 2002 January to 2005 April totaling 41.5 nights, plus
portions of two additional runs totaling 8 nights during SparsePak
commissioning in 2001 May-June.
Aperture-synthesis radio observations at 21cm have been obtained for
43 galaxies with either the VLA (seven galaxies in 2005), the WSRT (20
galaxies in 2007-2009, three overlapping with VLA), or the GMRT (19
galaxies in 2008-2009, one overlapping with VLA and WSRT, two others
overlapping with WSRT).
Spitzer near- and mid-infrared (4.5, 8, 24, and 70um) images were
taken of the majority of the Phase-B sample (40 galaxies).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 128 231 DiskMass sample
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See also:
VII/26 : Uppsala General Catalogue of Galaxies (UGC) (Nilson 1973)
J/ApJS/166/505 : Hα photometry of face-on galaxies (Andersen+, 2006)
J/AJ/131/2035 : B and R magnitudes for spiral galaxies (Galaz+, 2006)
J/A+A/442/137 : HI observations of WHISP disk galaxies (Noordermeer+, 2005)
J/ApJ/633/844 : Stellar mass in disk-dominated galaxies (Pizagno+, 2005)
J/A+AS/106/451 : Face-on disk galaxies photometry. I. (de Jong+, 1994)
J/AJ/106/530 : Low surface brightness disk galaxies (Bothun+, 1993)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- UGC UGC number
7- 8 I2 h RAh Hour of right ascension (J2000)
10- 11 I2 min RAm Minute of right ascension (J2000)
13- 16 F4.1 s RAs Second of right ascension (J2000)
18 A1 --- DE- Sign of declination (J2000)
19- 20 I2 deg DEd Degree of declination (J2000)
22- 23 I2 arcmin DEm Arcminute of declination (J2000)
25- 26 I2 arcsec DEs Arcsecond of declination (J2000)
28- 33 A6 --- Type Hubble morphological type
34 I1 --- f_Type [1/5]? additional classification (1)
36- 40 I5 km/s HRV NED heliocentric velocity
42- 46 F5.1 Mpc Dist NED distance (2)
48- 51 F4.2 mag AB B-band Galactic extinction
53- 56 F4.1 mag Bmag ? Apparent B-band magnitude from RC3, with
corrections applied
58- 60 F3.1 mag e_Bmag ? Bmag uncertainty
62- 66 F5.2 mag Ksmag ? 2MASS Ks-band magnitude, with corrections
applied
68- 71 F4.2 mag e_Ksmag ? Ksmag uncertainty
73- 77 F5.1 mag KMag ? Absolute K-band magnitude applying distance
modulus and Galactic extinction corrections
79- 81 F3.1 mag B-K ? Rest-frame B-K color index, corrected for
Galactic extinction
83- 85 F3.1 mag e_B-K ? B-K uncertainty
87- 90 F4.1 mag/arcsec2 mu0 Estimated disk central surface brightness
from POSS images, calibrated to R band
92- 95 F4.1 arcsec hR Estimated disk radial scale length
97-100 F4.1 arcsec r23.5 Apparent isophotal radius where
µR=23.5mag/arcsec2
102-107 A6 --- Sel Disk-mass Phase-A sample selection (3)
109-111 A3 --- Ha Hα IFU observations (D=DensePak or
S=SparsePak)
112 A1 --- f_Ha [g] incomplete Hα observation (4)
114-118 A5 --- sigma Stellar line-of-site velocity dispersion
(IFS) observations (σLOS*) (5)
119 A1 --- n_sigma [g] incomplete sigma observation (4)
122 A1 --- Spz [y/ ] Spitzer/IRAC or MIPS imaging?
124-128 A5 --- HI 21cm aperture-synthesis observations (V: VLA,
W: Westerbork and/or G: GMRT)
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Note (1): Flag as follows:
1 = peculiar;
2 = HII;
3 = star-burst;
4 = Liner;
5 = AGN (Seyfert or BLAGN)
Note (2): Distance assuming H0=73km/s/Mpc using flow-corrected velocities.
Note (3): Selection as follows:
p = pilot sample,
4 = 4/4 (176 sources were agreed upon by all four reviewers as satisfactory
targets, the 4/4 sample; see section 5.1 for further details),
d = DSS.
D = DSS sample objects (UGC 4036, 9610, 12224) have disk radial scale lengths
slightly outside the nominal DSS selection due to the improved disk
fitting described in Section 5.2.
Note (4):
g = IFU observations in Columns 16 and 18 (Hα or σLOS*) are in
some way incomplete (depth or spatial coverage), but in many cases yield
useful information.
Note (5): Code as follows:
M = SparsePak MgI region;
C = SparsePak CaII region;
P = PPak MgI region.
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History:
From electronic version of the journal
References:
Bershady et al. Paper II. 2010ApJ...716..234B 2010ApJ...716..234B
Westfall et al. Paper III. 2011ApJS..193...21W 2011ApJS..193...21W
Westfall et al. Paper IV. 2011ApJ...742...18W 2011ApJ...742...18W
(End) Emmanuelle Perret [CDS] 24-May-2012