J/A+A/472/111 Centaurus Compact Object Survey (Mieske+, 2007)
A search for ultra-compact dwarf galaxies in the Centaurus galaxy cluster.
Mieske S., Hilker M., Jordan A., Infante L., Kissler-Patig M.
<Astron. Astrophys., 472, 111-119 (2007)>
=2007A&A...472..111M 2007A&A...472..111M
ADC_Keywords: Clusters, galaxy; Radial velocities ; Equivalent widths
Keywords: galaxies: clusters: individual: Centaurus - galaxies: dwarf -
galaxies: fundamental parameters - galaxies: nuclei -
galaxies: star clusters
Abstract:
Our aim is to extend the investigations of ultra-compact dwarf
galaxies (UCD) beyond the well studied Fornax and Virgo clusters.
We measured spectroscopic redshifts of about 400 compact object
candidates with 19.2<V<22.4mag in the central region of the Centaurus
galaxy cluster (d=43Mpc), using 3 pointings with The
luminosity range of the candidates covers the bright end of the
globular cluster (GC) luminosity function and the luminosity regime of
UCDs in Fornax and Virgo. Within the area surveyed, our completeness
in terms of slit allocation is ∼30%.
Description:
The data for this publication were obtained in service mode with the
VIsible MultiObject Spectrograph VIMOS mounted on UT3 Melipal at the
VLT (programme 076.B-0293). VIMOS allows simultaneous observing of 4
quadrants, each of dimension 7'x8', and separated by about 2'. We
observed three multi-object spectroscopy (MOS) pointings in the
central Centaurus cluster, covering both NGC 4696 and NGC 4709.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 97 27 Properties of the 27 Centaurus compact objects
detected in our survey, ordered by magnitude
table2.dat 74 13 Properties of the 13 Centaurus cluster dEs
observed in our study
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See also:
J/A+AS/124/1 : The Centaurus Cluster Catalogue (Jerjen+ 1997)
J/A+A/327/952 : Centaurus cluster velocities (Stein+ 1997)
J/AJ/132/347 : Redshifts & photometry in Centaurus cluster (Chiboucas+, 2006)
J/ApJS/170/95 : Centaurus Cluster catalog (Chiboucas+, 2007)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [CCOS]
6- 21 A16 --- CCOS CCOS designation (JHHMM.mm+DDMM.mm) (1)
23- 24 I2 h RAh Right ascension (J2000)
26- 27 I2 min RAm Right ascension (J2000)
29- 33 F5.2 s RAs Right ascension (J2000)
35 A1 --- DE- Declination sign (J2000)
36- 37 I2 deg DEd Declination (J2000)
39- 40 I2 arcmin DEm Declination (J2000)
42- 46 F5.2 arcsec DEs Declination (J2000)
48- 52 F5.2 mag V0mag Dereddened V magnitude
54- 57 F4.2 mag (V-R)0 Dereddened V-R colour index
59- 62 I4 km/s RV Radial velocity
64- 66 I3 km/s e_RV rms uncertainty on RV
68- 71 F4.2 0.1nm EW<Fe> Fe equivalent width
73- 76 F4.2 0.1nm e_EW<Fe> rms uncertainty on EW<Fe>
78- 81 F4.2 0.1nm EWMgb Mgb equivalent width
83- 86 F4.2 0.1nm e_EWMgb rms uncertainty on EWMgb
88- 92 F5.2 pc rhl ? Half-light radius estimated from HST
archival imaging
94- 97 F4.2 pc e_rhl ? rms uncertainty on rhl
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Note (1): CCOS for Centaurus Compact Object Survey.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [CCC]
5- 7 I3 --- CCC CCC number (Jergen et al., 1997,
Cat. J/A+AS/124/1)
9- 10 I2 h RAh Right ascension (J2000)
12- 13 I2 min RAm Right ascension (J2000)
15- 19 F5.2 s RAs Right ascension (J2000)
21 A1 --- DE- Declination sign (J2000)
22- 23 I2 deg DEd Declination (J2000)
25- 26 I2 arcmin DEm Declination (J2000)
28- 32 F5.2 arcsec DEs Declination (J2000)
34- 38 F5.2 mag BTmag CCC BT magnitude
40- 43 I4 km/s RV Radial velocity
45- 46 I2 km/s e_RV rms uncertainty on RV
48- 51 F4.2 0.1nm EW<Fe> Fe equivalent width
53- 56 F4.2 0.1nm e_EW<Fe> rms uncertainty on EW<Fe>
58- 61 F4.2 0.1nm EWMgb Mgb equivalent width
63- 66 F4.2 0.1nm e_EWMgb rms uncertainty on EWMgb
68- 71 I4 km/s RV2 ?=- Stein et al. (1997, Cat. J/A+A/327/952)
radial velocity
73- 74 I2 km/s e_RV2 ? rms uncertainty on RV2
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 26-Nov-2007