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J/A+A/540/A27    Spectroscopy in Galactic globular clusters    (Saviane+, 2012)

Homogeneous metallicities and radial velocities for Galactic globular clusters. First CaT metallicities for twenty clusters. Saviane I., Da Costa G.S., Held E.V., Sommariva V., Gullieuszik M., Barbuy B., Ortolani S. <Astron. Astrophys. 540, A27 (2012)> =2012A&A...540A..27S
ADC_Keywords: Clusters, globular ; Stars, giant ; Equivalent widths ; Radial velocities Keywords: stars: abundances - stars: kinematics and dynamics - globular clusters: general Abstract: Well determined radial velocities and abundances are essential for analyzing the properties of the Globular Cluster system of the Milky Way. However more than 50% of these clusters have no spectroscopic measure of their metallicity. In this context, this work provides new radial velocities and abundances for twenty Milky Way globular clusters which lack or have poorly known values for these quantities. The radial velocities and abundances are derived from spectra obtained at the CaII triplet using the FORS2 imager and spectrograph at the VLT, calibrated with spectra of red giants in a number of clusters with well determined abundances. For about half of the clusters in our sample we present signifiant revisions of the existing velocities or abundances, or both. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file clusters.dat 36 28 Cluster list table3.dat 66 107 *Calibration cluster data table4.dat 66 272 *Program cluster data
Note on table3.dat: These data supersede those of Table 1 in Da Costa et al. (2009, cat. J/ApJ/705/1481) Note on table4.dat: For NGC 6656 (M22), these data supersede those of Table 2 in Da Costa et al. (2009, cat. J/ApJ/705/1481)
See also: J/ApJ/705/1481 : Spectroscopy of stars in 6 globular clusters (Da Costa+, 2009) Byte-by-byte Description of file: clusters.dat
Bytes Format Units Label Explanations
1- 7 A7 --- Cluster Cluster name 11- 12 I2 h RAh Simbad right ascension (J2000) 14- 15 I2 min RAm Simbad right ascension (J2000) 17- 21 F5.2 s RAs Simbad right ascension (J2000) 23 A1 --- DE- Simbad declination sign (J2000) 24- 25 I2 deg DEd Simbad declination (J2000) 27- 28 I2 arcmin DEm Simbad declination (J2000) 30- 33 F4.1 arcsec DEs Simbad declination (J2000) 35- 36 I2 --- Nstar Number of stars studied
Byte-by-byte Description of file: table3.dat table4.dat
Bytes Format Units Label Explanations
1- 7 A7 --- Cluster Cluster name 9- 15 A7 --- Star Star identification (N_NNNNN) 17- 25 F9.5 deg RAdeg Right ascension in decimal degrees (J2000) 27- 35 F9.5 deg DEdeg Declination in decimal degrees (J2000) 37- 40 I4 km/s HRV Heliocentric radial velocity 42- 46 F5.2 mag dVmag Differential magnitude from horizontal branch (V-VHB) 48- 51 F4.2 0.1nm W(8542) Equivalent Width of CaII line at 8542Å 53- 56 F4.2 0.1nm e_W(8542) Error on W(8542) 58- 61 F4.2 0.1nm W(8662) Equivalent Width of CaII line at 8662Å 63- 66 F4.2 0.1nm e_W(8662) Error on W(8662)
Acknowledgements: Ivo Saviane, isaviane(at)eso.org
(End) Patricia Vannier [CDS] 02-Mar-2012
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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