J/A+A/496/683 Early-type galaxies in the Centaurus cluster (Misgeld+, 2009)
The early-type dwarf galaxy population of the Centaurus cluster.
Misgeld I., Hilker M., Mieske S.
<Astron. Astrophys., 496, 683-693 (2009)>
=2009A&A...496..683M 2009A&A...496..683M (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Galaxies, photometry ; Morphology
Keywords: galaxies: clusters: individual: Centaurus - galaxies: dwarf -
galaxies: fundamental parameters -
galaxies: luminosity function, mass function
Abstract:
We analyse the properties of the early-type dwarf galaxy population in
the Centaurus cluster. We investigate the galaxy luminosity function,
galaxy scaling relations down to MV=-10mag. On deep VLT/FORS1 V- and
I-band images of the central part of the cluster, we identify cluster
dwarf-galaxy candidates using both morphological and surface
brightness selection criteria. The candidates' total magnitudes and
central surface brightnesses are derived from the analysis of their
surface brightness profiles.
Description:
The obtained photometric parameters for all early-type galaxies in our
sample (92 objects) are presented. For each galaxy right ascension,
declination, extinction corrected magnitude V and colour V-I, central
surface brightness and scale length of an exponential fit to the
surface brightness profile, effective surface brightness, effective
radius and profile shape index n, as obtained from a Sersic fit, are
given. The physical scale is 0.22kpc/arcsec at the assumed distance
modulus of (m-M)=33.28mag.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea2.dat 103 92 Photometric parameters for 92 early-type galaxies in
Centaurus cluster, ordered by increasing magnitude
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See also:
J/A+A/327/952 : Centaurus cluster velocities (Stein+ 1997)
J/A+AS/124/1 : The Centaurus Cluster Catalogue (Jerjen+ 1997)
J/AJ/132/347 : Redshifts and photometry in Centaurus cluster (Chiboucas+ 2006)
J/ApJS/170/95 : Centaurus Cluster catalog (Chiboucas+, 2007)
J/A+A/472/111 : Centaurus Compact Object Survey (Mieske+, 2007)
Byte-by-byte Description of file: tablea2.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Name Designation (C-N-NN)
8- 9 I2 h RAh Right ascension (J2000)
11- 12 I2 min RAm Right ascension (J2000)
14- 17 F4.1 s RAs Right ascension (J2000)
19 A1 --- DE- Declination sign
20- 21 I2 deg DEd Declination (J2000)
23- 24 I2 arcmin DEm Declination (J2000)
26- 29 F4.1 arcsec DEs Declination (J2000)
31- 35 F5.2 mag V0mag Extinction corrected Johnson V magnitude
37- 40 F4.2 mag e_V0mag Error of Vmag
42- 45 F4.2 mag (V-I)0 ? Extinction corrected Johnson V-I
colour index (1)
47- 50 F4.2 mag e_(V-I)0 ? Error of V-I
52- 56 F5.2 mag/arcsec+2 mu0 ? Central surface brightness (2)
58- 61 F4.2 mag/arcsec+2 e_mu0 ? Error of mu0
63- 66 F4.2 arcsec hr ? Scale length of exponential fit (2)
68- 71 F4.2 arcsec e_hr ? Error of hr
73- 77 F5.2 mag/arcsec+2 mueff ? Effective surface brightness (3)
79- 82 F4.2 mag/arcsec+2 e_mueff ? Error of mueff
84- 88 F5.2 arcsec reff ? Effective radius (3)
90- 93 F4.2 arcsec e_reff ? Error of reff
95- 98 F4.2 --- n ? Sersic profile shape index (3)
100-103 F4.2 --- e_n ? Error of n
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Note (1): For 2 objects (C-3-30 and C-1-47) no colour could be measured, since
they were located close to the image borders, only fully visible on
the V-band images.
Note (2): For objects with V magnitude brighter than 16.1mag and for two
compact elliptical galaxy candidates (C-2-20 and C-1-21), parameters
are not given, since the surface brightness profile is not well
described by an exponential law.
Note (3): For some galaxies the Sersic parameters are not given, since those
objects show a two component surface brightness profile, not well
fitted by a single Sersic law.
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Acknowledgements:
Ingo Misgeld, imisgeld(at)eso.org
(End) Ingo Misgeld [ESO, Germany], Patricia Vannier [CDS] 09-Apr-2009