J/ApJ/655/144 ACS Virgo Cluster Survey. XIII. (Mei+, 2007)
The ACS Virgo Cluster Survey.
XIII. SBF distance catalog and the three-dimensional structure of the
Virgo cluster.
Mei S., Blakeslee J.P., Cote P., Tonry J.L., West M.J., Ferrarese L.,
Jordan A., Peng E.W., Anthony A., Merritt D.
<Astrophys. J., 655, 144-162 (2007)>
=2007ApJ...655..144M 2007ApJ...655..144M
ADC_Keywords: Clusters, galaxy ; Photometry, SDSS ; Radial velocities
Keywords: galaxies: clusters: individual (Virgo) -
galaxies: distances and redshifts - galaxies: dwarf -
galaxies: elliptical and lenticular, cD
Abstract:
The ACS Virgo Cluster Survey consists of HST-ACS Advance Camera for
Surveys) imaging for 100 early-type galaxies in the Virgo Cluster,
observed in the F475W (∼SDSS g) and F850LP (∼SDSS z) filters. We
derive distances for 84 of these galaxies using the method of surface
brightness fluctuations (SBFs), present the SBF distance catalog, and
use this database to examine the three-dimensional distribution of
early-type galaxies in the Virgo Cluster. The SBF distance moduli have
a mean (random) measurement error of 0.07mag (0.5Mpc), or roughly 3
times better than previous SBF measurements for Virgo Cluster
galaxies. Five galaxies lie at a distance of d∼23Mpc and are members
of the W' cloud. The remaining 79 galaxies have a narrow distribution
around our adopted distance of =16.5±0.1 (random mean error)
±1.1Mpc (systematic). The rms distance scatter of this sample is
σ(d)=0.6±0.1Mpc, with little or no dependence on morphological
type or luminosity class (i.e., 0.7±0.1 and 0.5±0.1Mpc for the
giants and dwarfs, respectively). The back-to-front depth of the
cluster measured from our sample of early-type galaxies is
2.4±0.4Mpc (i.e., ±2σ of the intrinsic distance
distribution). The M87 (cluster A) and M49 (cluster B) subclusters are
found to lie at distances of 16.7±0.2 and 16.4±0.2Mpc,
respectively. There may be a third subcluster associated with M86. A
weak correlation between velocity and line-of-sight distance may be a
faint echo of the cluster velocity distribution not having yet
completely virialized. In three dimensions, Virgo's early-type
galaxies appear to define a slightly triaxial distribution, with axis
ratios of (1:0.7:0.5). The principal axis of the best-fit ellipsoid is
inclined ∼20°-40° from the line of sight, while the galaxies
belonging to the W' cloud lie on an axis inclined by ∼10°-15°.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 87 100 SBF (Surface Brightness Fluctuations) distances
for ACS Virgo Cluster Survey (ACSVCS) galaxies
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See also:
J/ApJS/153/223 : ACS Virgo Cluster Survey. I. (Cote+, 2004)
J/ApJS/154/509 : ACS Virgo Cluster Survey. II. (Jordan+, 2004)
J/ApJ/613/279 : ACS Virgo Cluster Survey. III. M87 (Jordan+, 2004)
J/ApJS/164/334 : ACS Virgo Cluster Survey. VI. (Ferrarese+, 2006)
J/ApJS/171/101 : ACS Virgo cluster Survey. XII. (Jordan+, 2007)
J/ApJ/681/197 : ACS Virgo Cluster Survey. XV. (Peng+, 2008)
J/ApJS/180/54 : ACS Virgo Cluster Survey. XVI. (Jordan+, 2009)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- ACSVCS [1/100] ACSVCS number (Cote et al. 2004,
Cat. J/ApJS/163/223)
5- 8 I4 --- VCC Virgo Cluster Catalog number (VCC, see
Binggeli et al. 1985, Cat. J/AJ/90/1681)
10- 13 F4.2 mag (g-z)0 ?=- (F475W-F850LP)0 colour index (1)
15- 18 F4.2 mag e_(g-z)0 ? rms uncertainty on (g-z)0
20- 24 F5.2 mag M850 ?=- Absolute SBF magnitude in z850
26- 29 F4.2 mag e_M850 ? rms uncertainty on M850
31- 35 F5.2 mag m-M ?=- Distance modulus (2)
37- 40 F4.2 mag e_m-M ?=- rms uncertainty on m-M
42- 46 F5.2 mag BTmag BT magnitude (3)
48- 51 I4 km/s Mean radial velocity (4)
53- 54 I2 km/s e_ rms uncertainty on
56- 67 A12 --- MType Morphological type (3)
69- 78 A10 --- OName Other name(s)
80- 87 A8 --- f_M850 Notes about M850 results (5)
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Note (1): over the same range of annuli used for the SBF measurements
(see Paper V, Mei et al., 2005ApJ...625..121M 2005ApJ...625..121M)
Note (2): obtained using the broken linear calibration (eq. [1]).
Note (3): from Binggeli et al. (1985, Cat. J/AJ/90/1681)
Note (4): from Huchra (1985ESOC...20..181H 1985ESOC...20..181H) and Binggeli et al.
(1993A&AS...98..275B 1993A&AS...98..275B)
Note (5): Notes as follows:
1 = no SBF measurement possible (dust)
2 = no SBF measurement possible (edge-on disk or bar)
3 = very uncertain SBF measurement due to the precence of a bright star
4 = no SBF measurement possible (sky subtraction)
5 = uncertain SBF measurement because of difficult sky or galaxy model
subtraction
6 = no SBF distance (galaxy too blue)
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History:
From electronic version of the journal
References:
Cote et al., Paper I 2004ApJS..153..223C 2004ApJS..153..223C, Cat. J/ApJS/153/223
Jordan et al. Paper II 2004ApJS..154..509J 2004ApJS..154..509J, Cat. J/ApJS/154/509
Jordan et al. Paper III 2004ApJ...613..279J 2004ApJ...613..279J, Cat. J/ApJ/613/279
Mei et al. Paper IV 2005ApJS..156..113M 2005ApJS..156..113M
Mei et al. Paper V 2005ApJ...625..121M 2005ApJ...625..121M
Ferrarese et al. Paper VI 2006ApJS..164..334F 2006ApJS..164..334F, Cat. J/ApJS/164/334
Hasegan et al. Paper VII 2005ApJ...627..203H 2005ApJ...627..203H
Cote et al., Paper VIII 2006ApJS..165...57C 2006ApJS..165...57C
Peng et al. Paper IX 2006ApJ...639...95P 2006ApJ...639...95P
Jordan et al. Paper X 2005ApJ...634.1002J 2005ApJ...634.1002J
Peng et al. Paper XI 2006ApJ...639..838P 2006ApJ...639..838P
Jordan et al. Paper XII 2007ApJS..171..101J 2007ApJS..171..101J, Cat. J/ApJS/171/101
Mieske et al. Paper XIV 2006ApJ...653..193M 2006ApJ...653..193M
Peng et al., Paper XV 2008ApJ...681..197P 2008ApJ...681..197P, Cat. J/ApJ/681/197
Jordan et al. Paper XVI 2009ApJS..180...54J 2009ApJS..180...54J, Cat. J/ApJS/180/54
(End) Patricia Vannier [CDS] 22-Apr-2014