J/MNRAS/382/1342 Compact stellar systems around NGC 1399 (Firth+, 2007)
Compact stellar systems around NGC 1399. Firth P., Drinkwater M.J., Evstigneeva E.A., Gregg M.D., Karick A.M., Jones J.B., Phillipps S. <Mon. Not. R. Astron. Soc., 382, 1342-1352 (2007)> =2007MNRAS.382.1342F (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Associations, stellar ; Radial velocities Keywords: galaxies: clusters: individual: Fornax cluster - galaxies: distances and redshifts - galaxies: individual: NGC 1399 - galaxies: kinematics and dynamics - galaxies: star clusters Abstract: We have obtained spectroscopic redshifts of colour-selected point sources in four wide area VLT-FLAMES (Very Large Telescope-Fibre Large Array Multi Element Spectrograph) fields around the Fornax cluster giant elliptical galaxy NGC 1399, identifying as cluster members 27 previously unknown faint (-10.5<Mg'←8.8) compact stellar systems (CSS), and improving redshift accuracy for 23 previously catalogued CSS. Description: Our observations over two nights in 2004 November at Cerro Paranal, Chile, were made under European Southern Observatory (ESO) observing programme 074.A-0508 with the FLAMES multifibre intermediate to high-resolution spectroscopic system attached to the Nasmyth-A focus of the 8-m Kueyen telescope. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 108 63 *Bound and unbound compact stellar systems (CSS)
Note on table2.dat: Objects identified as [FDE2007] JHHMMSS.ss+DDMMSS.s in Simbad.
See also: J/A+A/383/823 : Radial velocities of UCOs in Fornax (Mieske+, 2002) J/A+A/418/445 : FCOS Ultra Compact Dwarf galaxies radial vel. (Mieske+, 2004) J/A+A/448/155 : Radial velocities of Leo I globular clusters (Bergond+, 2006) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1 I1 --- Type [1/3] Type of cluster (1) 3- 4 I2 h RAh Right ascension (J2000) 6- 7 I2 min RAm Right ascension (J2000) 9- 13 F5.2 s RAs Right ascension (J2000) 15 A1 --- DE- Declination sign (J2000) 16- 17 I2 deg DEd Declination (J2000) 19- 20 I2 arcmin DEm Declination (J2000) 22- 25 F4.1 arcsec DEs Declination (J2000) 27- 31 F5.2 mag g'mag Deredenned CTIO g' magnitude 33- 37 F5.2 mag r'mag Deredenned CTIO r' magnitude 39- 43 F5.2 mag i'mag Deredenned CTIO i' magnitude 45- 48 F4.2 --- SGC-r Stellarity index (2) 49 A1 --- n_SGC-r [cde] Note on SGC-r (3) 51- 54 I4 km/s cz1 ? 2dF heliocentric recessional velocity (4) 56- 58 I3 km/s e_cz1 ? rms uncertainty on cz1 60- 63 I4 km/s cz2 ? FCOS heliocentric recessional velocity (5) 65- 67 I3 km/s e_cz2 ? rms uncertainty on cz2 69- 72 I4 km/s cz3 ? Bergond heliocentric recessional velocity (6) 74- 76 I3 km/s e_cz3 ? rms uncertainty on cz3 78- 81 I4 km/s cz4 ? VLT-FLAMES heliocentric recessional velocity 83- 84 I2 km/s e_cz4 ? rms uncertainty on cz4 86- 90 F5.2 --- R ? VLT-FLAMES cross-correlation R value 91 A1 --- n_R [)] ) indicates value from the previously published redshift measurement with the lowest error margin 93-103 A11 --- Galaxy Associated galaxy name 105-107 F3.1 --- DV/V ? Ratio of the recessional velocity difference (between the CSS and its potentially associated galaxy) and the escape velocity at the projected radius (7) 108 A1 --- n_DV/V [a] bound to a prominent cluster (8)
Note (1): Type of cluster as follows: 1 = known Fornax cluster galaxies 2 = known Fornax cluster compact stellar systems (CSS) 3 = new Fornax cluster compact stellar systems (CSS) Note (2): The stellarity index (SGC-r), derived by SExtractor from r' band photometry (Karick, 2005, PhD thesis, Univ. Melbourne), compares the target light profile to a point-spread function (0 = extended object; 1 = point source) Note (3): Note on SGC-r as follows: c = Photometry of these CSS has been affected by partial blending with adjacent stars. d = UCD3 is known to have an extended stellar halo (De Propris et al. 2005ApJ...623L.105D), and may be eventually classified as a dE,N galaxy (see full version of table). e = Photometry of this CSS has been affected by blending with a background galaxy Note (4): 2dF revised velocity data are derived from Drinkwater et al. (2000PASA...17..227D) and Gregg (in preparation). Note (5): FCOS data are from the Fornax Compact Object Survey (Mieske et al., 2004, Cat. J/A+A/418/445). FCOS catalogue identifiers (as sequenced in the table): 1-017, 2-0231, 2-078, 4-2028, 2-073, 0-2025, 3-2027, 1-2053, 1-060, 3-2004, 1-2083 and 3-2019. Note (6): Bergond data are from VLT-FLAMES spectroscopy (Bergond et al., 2006, Cat. J/A+A/448/155). Note (7): Therefore, a ratio less than 1 implies they are gravitationally bound. Note (8): 'a' quotes CSS considered to be gravitationally bound to a prominent cluster galaxy other than NGC 1399 - see analysis in the text.
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 04-Apr-2008
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