J/AJ/137/498 UCD and bright GC in Fornax (Gregg+, 2009)
A large population of ultra-compact dwarfs and bright intracluster globulars in
the Fornax cluster.
Gregg M.D., Drinkwater M.J., Evstigneeva E., Jurek R., Karick A.M.,
Phillipps S., Bridges T., Jones J.B., Bekki K., Couch W.J.
<Astron. J., 137, 498-506 (2009)>
=2009AJ....137..498G 2009AJ....137..498G
ADC_Keywords: Clusters, galaxy ; Galaxies, optical ; Clusters, globular
Keywords: galaxies: clusters: general - galaxies: dwarf -
globular clusters: general
Abstract:
All the previously cataloged ultracompact dwarf (UCD) galaxies
in the Fornax and Virgo clusters have 17.5<bJ<20. Using the 2dF
spectrograph on the Anglo-Australian Telescope, we have carried out
a search for fainter UCDs in the Fornax Cluster. In the magnitude
interval 19.5<bJ<21.5, we have found 54 additional compact cluster
members within a projected radius of 0.9° (320kpc) of the cluster
center, all of which meet our selection and observational criteria to
be UCDs.
Description:
The original FCSS observations in the central field of the Fornax
Cluster produced six UCDs in the range 16.5<bJ<20.0. Here, we define
UCDs simply as objects, which were classified as "stellar"
(unresolved) in the photographic Automatic Plate Measuring (APM)
catalog but were found to have redshifts consistent with the
membership of the Fornax Cluster (600km/s<cz<2500km/s).
In 2003 October and 2004 November, we made new 2dF observations in
Fornax to test this prediction.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 66 60 UCDs in Fornax
table3.dat 79 53 Fornax velocity member dE/S0,N galaxies
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See also:
VII/180 : Galaxies in Fornax Cluster & 5 nearby groups (Ferguson+ 1990)
J/A+A/383/823 : Radial velocities of UCOs in Fornax (Mieske+, 2002)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Seq Sequential number, [GDE2009] UCD NN in Simbad
4- 5 I2 h RAh Right ascension (J2000)
7- 8 I2 min RAm Right ascension (J2000)
10- 14 F5.2 s RAs Right ascension (J2000)
16 A1 --- DE- Declination sign (J2000)
17- 18 I2 deg DEd Declination (J2000)
20- 21 I2 arcmin DEm Declination (J2000)
23- 26 F4.1 arcsec DEs Declination (J2000)
28- 31 F4.1 mag rfmag ?=- rf magnitude (1)
33- 36 F4.1 mag bJmag ?=- bJ magnitude (1)
38- 41 I4 km/s RV Radial velocity
43- 45 I3 km/s e_RV rms uncertainty on RV
47- 66 A20 --- Notes Notes (2)
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Note (1): Photometry is from the APM digitized sky survey database;
objects with no photometry entries are either not detected or
merged with nearby objects.
Note (2): Original six UCDs from Phillipps et al. (2001ApJ...560..201P 2001ApJ...560..201P) and
Jones et al. (2006AJ....131..312J 2006AJ....131..312J) are identified. Also identified are
objects in common with
* Mieske et al. (2002, Cat, J/A+A/383/823, F-NNNN = in Simbad)
* Mieske et al. (2004, Cat. J/A+A/418/445, F-NNNN = in Simbad)
* Dirsch et al. (2004,Cat. J/AJ/127?2114, NN:NN = <[DRG2004] NN:NN> in Simbad)
* or Bergond et al. (2007, Cat. J/A+A/464/L21,
GCNN.NN = <[BAL2007] gcNN.NN> in Simbad,
UCD N = <[DJG2000] UCO N> in Simbad
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- FCC FCC number (1)
5- 6 I2 h RAh Right ascension (J2000)
8- 9 I2 min RAm Right ascension (J2000)
11- 15 F5.2 s RAs Right ascension (J2000)
17 A1 --- DE- Declination sign (J2000)
18- 19 I2 deg DEd Declination (J2000)
21- 22 I2 arcmin DEm Declination (J2000)
24- 27 F4.1 arcsec DEs Declination (J2000)
29- 32 F4.1 mag bJmag ?=- bJ magnitude (1)
34- 37 I4 km/s RV Radial velocity
39 I1 --- r_RV Reference for RV (2)
41- 47 F7.2 arcmin x Distance in alpha from the center of NGC1399
49- 55 F7.2 arcmin y Distance in delta from the center of NGC1399
57- 62 F6.2 arcmin R Radial distance from the center of NGC1399
64- 79 A16 --- Type Morphological type (1)
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Note (1): FCC number and galaxy types are from Ferguson (1989, Cat. VII/180).
Note (2): Sources for radial velocities as follows:
1 = Drinkwater et al. (2001ApJ...548L.139D 2001ApJ...548L.139D)
2 = Karick (2005, Phd thesis, Melbourne University)
3 = Drinkwater et al. (2000A&A...355..900D 2000A&A...355..900D)
4 = Mieske et al. (2002, Cat. J/A+A/383/823)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 31-Aug-2011