J/A+A/531/A4 Ultra compact dwarfs and globulars in Hya I (Misgeld+, 2011)
A large population of ultra-compact dwarf galaxies in the Hydra I cluster.
Misgeld I., Mieske S., Hilker M., Richtler T., Georgiev I.Y., Schuberth Y.
<Astron. Astrophys., 531, A4 (2011)>
=2011A&A...531A...4M 2011A&A...531A...4M
ADC_Keywords: Clusters, galaxy ; Galaxies, optical ; Clusters, globular ;
Galaxies, photometry
Keywords: galaxies: clusters: individual: Hydra I - galaxies: dwarf -
galaxies: fundamental parameters - galaxies: star clusters: general -
galaxies: kinematics and dynamics - globular clusters: general
Abstract:
We performed a large spectroscopic survey of compact, unresolved
objects in the core of the Hydra I galaxy cluster (Abell 1060), with
the aim of identifying ultra-compact dwarf galaxies (UCDs) and
investigating the properties of the globular cluster (GC) system
around the central cD galaxy NGC 3311.
We obtained VIMOS medium-resolution spectra of about 1200 candidate
objects with apparent magnitudes 18.5<V<24.0mag, covering both the
bright end of the GC luminosity function and the luminosity range of
all known UCDs.
Description:
VIMOS allows simultaneous observation of four quadrants in one
telescope pointing. Each quadrant is of dimension 7'x8', with a gap of
about 2' between the quadrants. For the UCD survey, we placed four
multi-object spectroscopy (MOS) pointings around NGC 3311, the central
cD galaxy of the Hydra I cluster.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 56 118 Catalogue of the 118 identified cluster GCs/UCDs
ordered by increasing apparent magnitude
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See also:
J/ApJS/85/249 : Surface Photometry of Hydra I Galaxies. I. (Hamabe 1993)
J/A+A/486/697 : Hydra I Cluster Catalogue (HCC) (Misgeld+, 2008)
J/AJ/137/498 : UCD and bright GC in Fornax (Gregg+, 2009)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [HUCD] (1)
5- 7 I3 --- ID [1/118] Identification (HUCDNN or NNN) (1)
10- 11 I2 h RAh Right ascension (J2000.0)
13- 14 I2 min RAm Right ascension (J2000.0)
16- 19 F4.1 s RAs Right ascension (J2000.0)
21 A1 --- DE- Declination sign (J2000.0)
22- 23 I2 deg DEd Declination (J2000.0)
25- 26 I2 arcmin DEm Declination (J2000.0)
28- 31 F4.1 arcsec DEs Declination (J2000.0)
33- 37 F5.2 arcmin R Projected distance to NGC 3311
39- 43 F5.2 mag V0 Extinction corrected apparent V magnitude
45- 48 F4.2 mag (V-R)0 Extinction corrected apparent V-R colour index
50- 53 I4 km/s RV Radial velocity
55- 56 I2 km/s e_RV rms uncertainty on RV
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Note (1): HUCD1-HUCD52, for cluster members brighter than MV=-11.0mag,
and 53-118 for cluster members fainter than MV=-11.0mag.
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Nomenclature note:
Clusters are <[MMH2011] HUCDNN> in Simbad for nos 1-52 and
<[MMH2011] NNN> for nos 53-118.
History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 03-Oct-2011