J/MNRAS/435/3667 Equivalent widths of 6 NGC5694 stars (Mucciarelli+, 2013) ================================================================================ NGC 5694: another foster son of the Galactic halo. Mucciarelli A., Bellazzini M., Catelan M., Dalessandro E., Amigo P., Correnti M., Cortes C., D'Orazi V. =2013MNRAS.435.3667M ================================================================================ ADC_Keywords: Clusters, globular ; Equivalent widths Keywords: techniques: spectroscopic - stars: abundances - globular clusters: individual: NGC 5694 Abstract: We present the results of the analysis of high-resolution spectra obtained with UVES-FLAMES at the Very Large Telescope for six red giant branch stars in the outer-halo metal-poor ([Fe/H]I=-1.98 and [Fe/H]II=-1.83) Galactic globular cluster NGC 5694, which has been suggested as a possible incomer by Lee et al. based on the anomalous chemical composition of a single cluster giant. We obtain accurate abundances for a large number of elements and we find that (a)the six target stars have the same chemical composition within the uncertainties, except for Na and Al; (b) the average cluster abundance of {alpha} elements (with the only exception of Si) is nearly solar, at odds with typical halo stars and globular clusters of similar metallicity; (c) Y, Ba, La and Eu abundances are also significantly lower than in Galactic field stars and star clusters of similar metallicity. Hence, we confirm the Lee et al. classification of NGC 5694 as a cluster of extragalactic origin. We provide the first insight on the Na-O and Mg-Al anticorrelations in this cluster: all the considered stars have very similar abundance ratios for these elements, except one that has significantly lower [Na/Fe] and [Al/Fe] ratios, suggesting that some degree of early self-enrichment has occurred also in this cluster. Description: The data have been acquired with the FLAMES@VLT spectrograph in the combined MEDUSA+UVES mode, allowing the simultaneous allocation of eight UVES high-resolution fibres (discussed in this paper) and 132 MEDUSA mid-resolution fibres (discussed in a forthcoming paper, mainly devoted to the internal kinematics of the cluster). The employed spectral configuration for the UVES targets discussed in this paper is the 580 Red Arm, with a spectral resolution of ~40000 and covering the range ~4800-6800{AA}. A total of eight exposures of 46min each for the same targets configuration has been secured in Service Mode during the period between 2012 April and July. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table1.dat 71 6 Fundamental parameters for target stars table2.dat 50 1104 Atomic data and measured EWs of the UVES targets -------------------------------------------------------------------------------- See also: J/A+AS/82/71 : Deep photometry of NGC 5694 and Terzan 8 (Ortolani+, 1990) Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 3 I3 --- ID [37/105] Target number 5- 7 I3 --- G95 [28/110] Identification in Geisler et al, 1995AJ....109..605G 9- 19 F11.7 deg RAdeg Right ascension (J2000) 21- 31 F11.7 deg DEdeg Declination (J2000) 33- 38 F6.3 mag Bmag [17.0/17.6] B magnitude 40- 45 F6.3 mag Vmag [15.6/16.6] V magnitude 47- 52 F6.1 km/s RV [-152/-136] Radial velocity 54- 56 F3.1 km/s e_RV [0.3/0.5] rms uncertainty on RV 58- 61 I4 K Teff [4180/4596] Effective temperature 63- 66 F4.2 [cm/s2] logg [0.6/1.3] Surface gravity 68- 71 F4.2 km/s vt [1.6/1.9] Microturbulent velocity {xi} -------------------------------------------------------------------------------- Byte-by-byte Description of file:table2.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 8 A8 --- --- [NGC5694-] 9- 11 I3 --- ID [37/105] Target number 13- 18 F6.1 0.1nm lambda [4873/6807] Wavelength ({AA}) 20- 24 A5 --- Ion Element and ionization stage 26- 31 F6.3 [-] loggf Oscillator strength 33- 37 F5.3 eV chi Energy potential {chi} 39- 44 F6.2 0.1pm EW Line equivalent width (m{AA}) 46- 50 F5.2 0.1pm e_EW rms uncertainty on EW (m{AA}) -------------------------------------------------------------------------------- History: From electronic version of the journal ================================================================================ (End) Patricia Vannier [CDS] 12-Oct-2014