J/AJ/125/478 HST imaging of brightest cluster galaxies (Laine+, 2003)
Hubble space telescope imaging of brightest cluster galaxies.
Laine S., Van Der Marel R.P., Lauer T.R., Postman M., O'Dea C.P., Owen F.N.
<Astron. J., 125, 478-505 (2003)>
=2003AJ....125..478L 2003AJ....125..478L
ADC_Keywords: Clusters, galaxy ; Galaxies, photometry
Keywords: elliptical and lenticular, cD - galaxies: evolution -
galaxies: nuclei - galaxies: photometry - galaxies: structure
Abstract:
We used the Hubble Space Telescope Wide Field Planetary Camera 2 to
obtain Iband images of the centers of 81 brightest cluster galaxies
(BCGs), drawn from a volume-limited sample of nearby BCGs. The images
show a rich variety of morphological features, including multiple or
double nuclei, dust, stellar disks, point-source nuclei, and central
surface brightness depressions. Highresolution surface brightness
profiles could be inferred for 60 galaxies. Of those, 88% have
well-resolved cores.
Description:
All images were taken with the Wide Field Planetary Camera 2 (WFPC2)
instrument on board the HST between 2000 July 3 and 2001 July 26.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 111 81 Sample of Abell Cluster BCG Galaxies Cluster
table4.dat 75 81 Properties of BCGs and Their Host Clusters
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See also:
VII/4 : Abell and Zwicky Clusters of Galaxies (Abell+ 1974)
VII/110 : Rich Clusters of Galaxies (Abell+ 1989)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Cluster Cluster name
12- 22 A11 --- OName Other name
24- 25 I2 h RAh Right ascension of the BCG center (J2000.0) (1)
27- 28 I2 min RAm Right ascension of the BCG center (J2000.0) (1)
30- 34 F5.2 s RAs Right ascension of the BCG center (J2000.0) (1)
36 A1 --- DE- Declination sign of the BCG center (J2000.0) (1)
37- 38 I2 deg DEd Declination of the BCG center (J2000.0) (1)
40- 41 I2 arcmin DEm Declination of the BCG center (J2000.0) (1)
43- 46 F4.1 arcsec DEs Declination of the BCG center (J2000.0) (1)
48- 52 I5 km/s cz Heliocentric velocity cz for the BCG
54- 59 F6.2 Mpc Dist Angular diameter distance of the BCG
61- 65 F5.2 mag Rmet R-band metric magnitude in an aperture
of 10h-1kpc
67- 72 F6.2 mag VMAG Total absolute V-band magnitude
74- 78 F5.2 [solLum] logLV Total V-band luminosity
80 A1 --- F4 [YSN] Profiles are shown in Fig.4 (2)
82- 87 F6.1 --- North Orientation on the sky of the images that are
shown in Fig. 1.
89- 93 F5.3 mag E(B-V) Foreground reddening E(BV)
95-111 A17 --- Notes Identifies any special features seen in the
HST images (3)
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Note (1): Galaxies identified as [LVL2003] JHHMMSS.ss+DDMMSS.s in Simbad
Note (2): Profiles code as follows:
Y = an accurate surface brightness profile could be determined and
fitted with the Nuker formulation
S = we were able to derive a surface brightness profile that was not
accurate enough for fitting
N = it was impossible to derive any reasonable surface brightness profile.
Note (3): Notes as follows:
Sp = spiral galaxy morphology;
MN = multiple nuclei (see Sect. 3.1)
Double = double nucleus (see Sect. 3.1)
Dust = dust absorption features (see Sect. 3.2)
Disk = the circumnuclear morphology has a high ellipticity,
suggesting the possible presence of an edge-on nuclear disk
(see Sect. 3.3)
Nuc = bright point-like nucleus, most likely associated with an
AGN (see Sect. 4.2)
Hollow = depression in the surface brightness in the very nucleus
(see Sect. 4.4).
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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- 10 A10 --- Cluster Cluster name
14- 19 A6 --- BM Bautz-Morgan cluster morphology classification
22- 28 F7.3 mag RMAG Absolute R-band metric magnitude of the BCG
inside an aperture of 10kpc radius
30- 34 F5.3 --- alpha Parameter α, which measures the
logarithmic slope of the metric luminosity as
a function of radius, determined at a physical
radius of 10kpc
36- 41 F6.3 --- delta Residual δ between the observed metric
luminosity and that predicted by the BCG
standard-candle relation between metric
luminosity and alpha
43- 47 F5.3 mag B-R B-R color index at the metric radius after
correcting for Galactic extinction and
Kdimming
49- 51 I3 --- Rich Richness Abell richness count
53- 57 F5.3 Mpc Sep Projected separation of the BCG from the
cluster center
59- 62 I4 km/s VelDiff Difference between the line of sight velocity
of the BCG and the systemic velocity of the
cluster
64- 69 F6.1 km/s sigma ?=- Available velocity dispersion for clusters
that have measured redshifts for at least
20 member galaxies
71- 75 F5.3 10+37W LX ?=- X-ray luminosities from the compilation of
Jones & Forman, 1999, Cat. J/ApJ/511/65 (1)
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Note (1): All data are based on Postman & Lauer (1995, Cat. J/ApJ/440/28),
unless otherwise noted.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 10-Jan-2008