J/A+A/486/697 Hydra I Cluster Catalogue (HCC) (Misgeld+, 2008)
The early-type dwarf galaxy population of the Hydra I cluster.
Misgeld I., Mieske S., Hilker M.
<Astron. Astrophys., 486, 697-709 (2008)>
=2008A&A...486..697M 2008A&A...486..697M
ADC_Keywords: Clusters, galaxy ; Galaxies, photometry ; Radial velocities
Keywords: galaxies: clusters: individual: Hydra I - galaxies: dwarf -
galaxies: fundamental parameters - galaxies: luminosity function -
mass function
Abstract:
We analyse the properties of the early-type dwarf galaxy population in
the Hydra I cluster. We investigate the galaxy luminosity function,
the colour-magnitude relation, and the magnitude-surface brightness
relation down to MV=-10mag. Deep VLT/FORS1 images in V and I bands
were examined. We identify cluster members by radial velocity
measurements and select other cluster galaxy candidates by their
morphology. The candidates' total magnitudes and central surface
brightnesses were derived from the analysis of their surface
brightness profiles.
Description:
The obtained photometric parameters along with the available radial
velocities for all early-type galaxies in our sample (111 objects) are
presented in the Hydra I Cluster Catalogue (HCC). 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 0.2kpc/arcsec at
the assumed distance modulus of (m-M)=33.07mag. The radial velocities
are taken from our study and from Christlein & Zabludoff
(2003ApJ...591..764C 2003ApJ...591..764C).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea2.dat 109 111 Photometric parameters and radial velocities for
111 early-type galaxies in the Hydra I cluster,
ordered by increasing magnitude
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See also:
J/ApJS/85/249 : Surface photometry of Hydra I galaxies. I. (Hamabe 1993)
Byte-by-byte Description of file: tablea2.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [HCC-]
5- 7 I03 --- HCC Hydra I Cluster Catalogue (HCC) number
9- 10 I2 h RAh Right ascension (J2000)
12- 13 I2 min RAm Right ascension (J2000)
15- 18 F4.1 s RAs Right ascension (J2000)
20 A1 --- DE- Declination sign
21- 22 I2 deg DEd Declination (J2000)
24- 25 I2 arcmin DEm Declination (J2000)
27- 30 F4.1 arcsec DEs Declination (J2000)
32- 36 F5.2 mag Vmag V magnitude
38- 41 F4.2 mag e_Vmag Error of Vmag
43- 46 F4.2 mag V-I V-I colour index
48- 51 F4.2 mag e_V-I Error of V-I
53- 57 F5.2 mag/arcsec2 mu0 ? Central surface brightness (1)
59- 62 F4.2 mag/arcsec2 e_mu0 ? Error of mu0
64- 67 F4.2 arcsec hr ? Scale length of exp. fit (1)
69- 72 F4.2 arcsec e_hr ? Error of hr
74- 78 F5.2 mag/arcsec2 mueff ? Effective surface brightness (2)
80- 83 F4.2 mag/arcsec2 e_mueff ? Error of mueff
85- 90 F6.2 arcsec reff ? Effective radius (2)
92- 95 F4.2 arcsec e_reff ? Error of reff
97-100 F4.2 --- n ? Sersic profile shape index (2)
102-105 I4 km/s HRV ? Heliocentric radial velocity
107-109 I3 km/s e_HRV ? Error of HRV
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Note (1): For objects with V magnitude brighter than 16.1mag, parameters
are not given, since the surface brightness profile is not well
described by an exponential law.
Note (2): Sersic index n: f(r)∝r1/n)
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] 23-Jul-2008