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J/AJ/139/1871          Kinematics of globulars in NGC 5128      (Woodley+, 2010)

The kinematics of the globular cluster system of NGC 5128 with a new large sample of radial velocity measurements. Woodley K.A., Gomez M., Harris W.E., Geisler D., Harris G.L.H. <Astron. J., 139, 1871-1888 (2010)> =2010AJ....139.1871W
ADC_Keywords: Clusters, globular ; Radial velocities ; Galaxies, nearby Keywords: catalogs - galaxies: elliptical and lenticular, cD - galaxies: individual (NGC 5128) - galaxies: kinematics and dynamics - galaxies: star clusters: general - globular clusters: general - planetary nebulae: general Abstract: New radial velocity measurements for previously known and newly confirmed globular clusters (GCs) in the nearby massive galaxy NGC 5128 are presented. We have obtained spectroscopy from LDSS-2/Magellan, VIMOS/Very Large Telescope, and HYDRA/Cerro Tololo Inter-American Observatory from which we have measured the radial velocities of 218 known, and identified 155 new, GCs. The current sample of confirmed GCs in NGC 5128 is now 605 with 563 of these having radial velocity measurements, the second largest kinematic database for any galaxy. We have performed a new kinematic analysis of the GC system that extends out to 45' in galactocentric radius. We have examined the systemic velocity, projected rotation amplitude and axis, and the projected velocity dispersion of the GCs as functions of galactocentric distance and metallicity. Description: We obtained multi-object slit spectroscopy with the spectrograph-2 (LDSS-2) on the Baade/Magellan 6.5m telescope at the Las Campanas Observatory in Chile. We observed 12 fields scattered around the central regions of NGC 5128 on 2002 May 9-10 (PI: D. Geisler) with the 6' field of view of LDSS-2. We obtained spectroscopy with the VIMOS MOS/Very Large Telescope (VLT) 8m telescope in 2007 (PI: M. Gomez, Program ID 079.D-0539), on Paranal, Chile. We obtained spectroscopy from the HYDRA Spectrograph on the Cerro Tololo Inter-American Observatory (CTIO) Blanco 4m telescope, in Chile (PI: W. Harris, Program ID 2007A-0070). We observed from 2007 April 7 to April 10 and had 2.5 usable nights of data. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 71 218 Radial velocity measurements of previously confirmed Globular Clusters in NGC 5128 table3.dat 103 155 Radial velocity measurements of newly confirmed Globular Clusters in NGC 5128
See also: J/ApJ/708/1335 : Spectroscopy of GCs in NGC 5128 (Woodley+, 2010) J/AJ/140/2101 : NGC 5128 globular clusters photometry (Sinnott+, 2010) J/MNRAS/386/1443 : 2dF study of globular clusters in NGC 5128 (Beasley+, 2008) J/AJ/134/494 : NGC 5128 globular clusters UBVRICMT1 phot. + RV (Woodley+, 2007) J/AJ/132/2187 : MCT1 photometry of NGC 5128 GCs (Harris+, 2006) J/AJ/128/712 : Washington Photometry in NGC 5128 (Harris+, 2004) J/ApJS/150/367 : Globular clusters in NGC 5128 (Peng+, 2004) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 6 A6 --- [WHB2007] Globular cluster identification 8- 9 I2 h RAh Hour of Right Ascension (J2000) 11- 12 I2 min RAm Minute of Right Ascension (J2000) 14- 18 F5.2 s RAs Second of Right Ascension (J2000) 20 A1 --- DE- Sign of the Declination (J2000) 21- 22 I2 deg DEd Degree of Declination (J2000) 24- 25 I2 arcmin DEm Arcminute of Declination (J2000) 27- 31 F5.2 arcsec DEs Arcsecond of Declination (J2000) 33- 35 I3 km/s VLDSS2 ? LDSS-2/Magellan radial velocity 37- 39 I3 km/s e_VLDSS2 ? Uncertainty in VLDSS2 41 A1 --- f_VLDSS2 Average of discordant values (1) 43- 45 I3 km/s VVIMOS ? VIMOS/VLT radial velocity 47- 49 I3 km/s e_VVIMOS ? Uncertainty in VVIMOS 51 A1 --- f_VVIMOS Average of discordant values (1) 53- 55 I3 km/s VHydra ? Hydra/CTIO radial velocity 57- 59 I3 km/s e_VHydra ? Uncertainty in VHydra 61 A1 --- f_VHydra Average of discordant values (1) 63- 65 I3 km/s Vrad New weighted radial velocity (2) 67- 69 I3 km/s e_Vrad Uncertainty in Vrad 71 A1 --- f_Vrad Discordant values of Vrad (1)
Note (1): Flag as follows: a = The weighted average of two radial velocity measurements with LDSS-2, 610±66km/s and 485±69km/s. b = The weighted average of three radial velocity measurements with Hydra, 563±47km/s, 555±26km/s, and 530±28km/s. c = The weighted average of two radial velocity measurements with Hydra, 760±18km/s and 772±23km/s. d = The weighted average of two radial velocity measurements with LDSS-2, 691±44km/s and 693±49km/s. e = The weighted average of two radial velocity measurements with LDSS-2, 566±46km/s and 495±34km/s. f = The weighted average of two radial velocity measurements with Hydra, 457±17km/s and 432±21km/s. g = The weighted average of three radial velocity measurements with Hydra, 580±44km/s, 535±67km/s, and 594±20km/s. h = The weighted average of two radial velocity measurements with LDSS-2, 465±51km/s and 524±28km/s. i = The weighted average of two radial velocity measurements with Hydra, 600±47km/s and 508±31km/s. j = This object was originally classified as a GC from a Hubble Space Telescope study by Harris et al. (2006, Cat. J/AJ/132/2187). This is the first radial velocity measurement of this object, and it has a greater than 0.8 correlation peak for the recorded velocity, indicating it may be a star and not a genuine GC. k = The weighted average of two radial velocity measurements with Hydra, 634±29km/s and 615±50km/s. l = The weighted average of two radial velocity measurements with VIMOS, 392±18km/s and 427±19km/s. m = The weighted average of three radial velocity measurements with Hydra, 458±23km/s, 461±29km/s, and 460±17km/s. n = The weighted average of two radial velocity measurements with Hydra, 601±29km/s and 596±30km/s. o = The weighted average of three radial velocity measurements with Hydra, 417±40km/s, 413±14km/s, and 409±28km/s. Note (2): The new weighted velocity measurement of all GCs in the past literature combined with the new measurements of this study: van den Bergh et al. 1981AJ.....86...24V; Hesser et al. 1984ApJ...276..491H, 1986ApJ...303L..51H; Harris et al. 1992AJ....104..613H; Peng et al. 2004, Cat. J/ApJS/150/367; Woodley et al. 2005AJ....129.2654W, 2010ApJ...708.1335W; Rejkuba et al. 2007A&A...469..147R; Beasley et al. 2008, Cat. J/MNRAS/386/1443)
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 6 A6 --- [WHB2007] Globular cluster identification 8 A1 --- f_[WHB2007] [b] indicates new globular cluster but with caution (1) 10- 11 I2 h RAh Hour of Right Ascension (J2000) 13- 14 I2 min RAm Minute of Right Ascension (J2000) 16- 20 F5.2 s RAs Second of Right Ascension (J2000) 22 A1 --- DE- Sign of the Declination (J2000) 23- 24 I2 deg DEd Degree of Declination (J2000) 26- 27 I2 arcmin DEm Arcminute of Declination (J2000) 29- 32 F4.1 arcsec DEs Arcsecond of Declination (J2000) 34- 38 F5.2 mag Cmag ? Washington/C band magnitude (1) 40- 43 F4.2 mag e_Cmag ? Error in Cmag 45- 49 F5.2 mag Mmag Washington/M band magnitude (1) 51- 54 F4.2 mag e_Mmag Error in Mmag 56- 60 F5.2 mag T1mag Washington/T1 band magnitude (1) 62- 65 F4.2 mag e_T1mag Error in T1mag 67- 69 I3 km/s VLDSS2 ? LDSS-2/Magellan radial velocity 71- 73 I3 km/s e_VLDSS2 ? Uncertainty in VLDSS2 75- 77 I3 km/s VVIMOS ? VIMOS/VLT radial velocity 79- 81 I3 km/s e_VVIMOS ? Uncertainty in VVIMOS 83- 86 I4 km/s VHydra ? Hydra/CTIO radial velocity 88- 90 I3 km/s e_VHydra ? Uncertainty in VHydra 92 A1 --- f_VHydra [d] Flag on VHydra (2) 94- 97 I4 km/s Vrad New weighted radial velocity (3) 99-101 I3 km/s e_Vrad Uncertainty in Vrad 103 A1 --- f_Vrad [ac] Flag on VRad (2)
Note (1): From Harris et al. (2004, Cat. J/AJ/128/712) Note (2): Flag as follows: a = A second strong correlation peak was found at 182±31km/s. b = Structural parameter measurements indicate the object may be a star. c = A second strong correlation peak was found at 103±106km/s. d = The weighted velocity of two measurements with Hydra, 539±50km/s and 510±29km/s. Note (3): The weighted average of all radial velocity measurements of these new globular clusters.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 13-Jul-2011
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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