J/ApJ/681/1505 Abundances of red giants in {omega} Cen (Johnson+, 2008) ================================================================================ Fe and Al abundances for 180 red giants in the globular cluster omega Centauri (NGC 5139). Johnson C.I., Pilachowski C.A., Simmerer J., Schwenk D. =2008ApJ...681.1505J (SIMBAD/NED BibCode) ================================================================================ ADC_Keywords: Stars, giant ; Abundances, [Fe/H] ; Radial velocities ; Clusters, globular ; Equivalent widths ; Photometry ; Spectroscopy Keywords: globular clusters: general - stars: abundances - stars: Population II globular clusters: individual ({omega} Centauri, NGC 5139) Abstract: We present radial velocities and Fe and Al abundances for 180 red giant branch (RGB) stars in the Galactic globular cluster Omega Centauri ({omega} Cen). The majority of our data lie in the range 11.01Gyr. Description: The observations of all 180 giants in {omega} Cen were obtained with the Blanco 4m telescope using the Hydra multifiber positioner and bench spectrograph at the Cerro Tololo Inter-American Observatory, in UT 2003 July 17, 18 and 19. Spectra include the region from 6500-6750{AA}. Target stars, coordinates, photometry, and membership probability were taken from the proper motion study by van Leeuwen et al. (2000, Cat. J/A+A/360/472). Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 13 26 45.9 -47 28 37 omega Centauri = NGC 5139 ---------------------------------------------------------- File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table2.dat 28 180 *Radial velocity and membership information table3.dat 57 180 Photometry and model atmosphere parameters table4.dat 24 23 Line list table5.dat 89 180 Equivalent widths table6.dat 41 180 Derived abundances -------------------------------------------------------------------------------- Note on table2.dat : The cluster mean radial velocity, error and 1{sigma} values are given here: --------------------- HRV e_HRV Sigma --------------------- 231.8 1.6 0.8 232.0 1.5 0.6 11.7 0.3 0.6 --------------------- -------------------------------------------------------------------------------- See also: J/ApJS/99/637 : Equivalent widths for 54 red giants (Norris+ 1995) J/ApJ/462/241 : Ca abundance for Omega Cen red giants (Norris+ 1996) J/A+A/360/472 : Proper motions in omega Centauri (van Leeuwen+, 2000) J/A+A/445/503 : Radial velocities in Omega Cen (NGC5139) (Reijns+, 2006) J/ApJ/647/1075 : Age-metallicity relation of {omega} Cen (Stanford+, 2006) J/ApJ/661/L155 : Radial velocities Rgb stars in omega Cen (Pancino+, 2007) J/MNRAS/396/2183 : Radial velocities of red giants in {omega} Cen (Sollima+, 2009) Byte-by-byte Description of file: table2.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 5 I5 --- Star Van Leeuwen et al. (2000, Cat. J/A+A/360/472) identification (G1) 7- 10 I4 --- OName ? Woolley (1966ROAn....2....1W) identification number (G2) 12- 16 F5.1 km/s HRV Heliocentric radial velocity 18- 20 F3.1 km/s e_HRV Error in HRV 22- 24 F3.1 --- sigma The 1{sigma} deviation from mean 26- 28 I3 % Mm ? van Leeuwen et al. (2000, Cat. J/A+A/360/472) membership probability -------------------------------------------------------------------------------- Byte-by-byte Description of file: table3.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 5 I5 --- Star Van Leeuwen et al. (2000, Cat. J/A+A/360/472) identification (G1) 7- 10 I4 --- OName ? Woolley (1966ROAn....2....1W) identification number (G2) 12- 17 F6.3 mag Vmag van Leeuwen et al. (2000, Cat. J/A+A/360/472) V band magnitude 19- 23 F5.3 mag B-V The (B-V) color index 25- 29 F5.3 mag V-K The (V-Ks) color index (1) 31- 36 F6.3 mag VMAG Extinction corrected absolute V band magnitude 38- 41 I4 K Teff Effective temperature 43- 46 F4.2 [cm/s2] log(g) Log of surface gravity 48- 52 F5.2 [Sun] [Fe/H] Metallicity 54- 57 F4.2 km/s Vturb Microturbulent velocity -------------------------------------------------------------------------------- Note (1): Transformed to the Carlos Sanchez Telescope (TCS) photometric system. -------------------------------------------------------------------------------- Byte-by-byte Description of file: table4.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 5 A5 --- Ion Element name 7- 13 F7.2 0.1nm Wave Wavelength in Angstroms 15- 18 F4.2 eV ExPot Excitation Potential 20- 24 F5.2 [-] log(gf) Log of oscillator strength -------------------------------------------------------------------------------- Byte-by-byte Description of file: table5.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 5 I5 --- Star Van Leeuwen et al. (2000, Cat. J/A+A/360/472) identification (G1) 7- 8 I2 0.1pm W6516 ? Equivalent width at 6516 Angstroms (1) 10- 11 I2 0.1pm W6533 ? Equivalent width at 6533 Angstroms (1) 13- 15 I3 0.1pm W6546 ? Equivalent width at 6546 Angstroms (1) 17- 19 I3 0.1pm W6551 ? Equivalent width at 6551 Angstroms (1) 21- 23 I3 0.1pm W6574 ? Equivalent width at 6574 Angstroms (1) 25- 27 I3 0.1pm W6592 Equivalent width at 6592 Angstroms (1) 29- 31 I3 0.1pm W6593 ? Equivalent width at 6593 Angstroms (1) 33- 34 I2 0.1pm W6597 ? Equivalent width at 6597 Angstroms (1) 36- 38 I3 0.1pm W6608 ? Equivalent width at 6608 Angstroms (1) 40- 42 I3 0.1pm W6609 ? Equivalent width at 6609 Angstroms (1) 44- 46 I3 0.1pm W6625 ? Equivalent width at 6625 Angstroms (1) 48- 49 I2 0.1pm W6627 ? Equivalent width at 6627 Angstroms (1) 51- 52 I2 0.1pm W6633 ? Equivalent width at 6633 Angstroms (1) 54- 55 I2 0.1pm W6646 ? Equivalent width at 6646 Angstroms (1) 57- 59 I3 0.1pm W6648 ? Equivalent width at 6648 Angstroms (1) 61- 63 I3 0.1pm W6677 ? Equivalent width at 6677 Angstroms (1) 65- 66 I2 0.1pm W6696 ? Equivalent width at 6696 Angstroms (1) 67 A1 --- f_W6696 [S] Flag on W6696 (2) 69- 70 I2 0.1pm W6698 ? Equivalent width at 6698 Angstroms (1) 71 A1 --- f_W6698 [S] Flag on W6698 (2) 73- 75 I3 0.1pm W6703 ? Equivalent width at 6703 Angstroms (1) 77- 79 I3 0.1pm W6710 ? Equivalent width at 6710 Angstroms (1) 81- 82 I2 0.1pm W6726 ? Equivalent width at 6726 Angstroms (1) 84- 85 I2 0.1pm W6733 ? Equivalent width at 6733 Angstroms (1) 87- 89 I3 0.1pm W6739 ? Equivalent width at 6739 Angstroms (1) -------------------------------------------------------------------------------- Note (1): In units of milli-Angstroms (m{AA}=0.1pm) Note (2): 'S' indicates a synthetic spectrum comparison method was used. -------------------------------------------------------------------------------- Byte-by-byte Description of file: table6.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 5 I5 --- Star Van Leeuwen et al. (2000, Cat. J/A+A/360/472) identification (G1) 7- 10 F4.2 [-] logFe Log of Fe number {epsilon} abundance (1) 12- 16 F5.2 [Sun] [Fe/H] Log of Fe/H number abundance relative to solar (2) 18- 19 I2 --- o_[Fe/H] Number of lines used to derive [Fe/H] 21- 24 F4.2 [Sun] e_[Fe/H] The {sigma}/N^0.5^ deviation of [Fe/H] 26- 29 F4.2 [-] logAl ? Log of Al number abundance (1) 31- 34 F4.2 [Sun] [Al/H] ? Log of Al/H number abundance relative to solar (3) 36 I1 --- o_[Al/H] ? Number of lines used to derive [Al/H] 38- 41 F4.2 [Sun] e_[Al/H] ? The {sigma}/N^0.5^ deviation of [Al/H] -------------------------------------------------------------------------------- Note (1): Where log(H)=12 Note (2): Assumed the solar log{epsilon}(Fe)=7.52 (Sneden et al., 1991AJ....102.2001S). Note (3): Assumed the solar log{epsilon}(Al)=6.47 (Anders & Grevesse, 1989GeCoA..53..197A). -------------------------------------------------------------------------------- Global notes: Note (G1): Objects are designated by in Simbad. Note (G2): Objects are in Simbad. History: From electronic version of the journal ================================================================================ (End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 03-Nov-2010