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J/A+A/613/A56        Spectroscopy of globular clusters           (Larsen+, 2018)

Detailed abundance analysis of globular clusters in the Local Group: NGC 147, NGC 6822, and Messier 33. Larsen S. S., Brodie J. P., Wasserman, A., Strader J. <Astron. Astrophys. 613, A56 (2018)> =2018A&A...613A..56L (SIMBAD/NED BibCode)
ADC_Keywords: Abundances ; Abundances, [Fe/H] ; Clusters, globular ; Spectroscopy Keywords: galaxies: stars clusters: general - galaxies: abundances - galaxies: individual: NGC 147 - galaxies: individual: NGC 6822 - galaxies: individual: M33 Abstract: We present new abundance measurements for eleven GCs in the Local Group galaxies NGC 147, NGC 6822, and Messier 33. These are combined with previously published observations of four GCs in the Fornax and WLM galaxies. The abundances were determined from analysis of integrated-light spectra, obtained with HIRES on the Keck I telescope and with UVES on the VLT. We find that the clusters with [Fe/H]←1.5 are all alpha-enhanced at about the same level as Milky Way GCs. Their Na abundances are also generally enhanced relative to Milky Way halo stars, suggesting that these extragalactic GCs resemble their Milky Way counterparts in containing significant fractions of Na-rich stars. For [Fe/H]>-1.5, the GCs in M33 are also alpha-enhanced, while the GCs that belong to dwarfs (NGC 6822 SC7 and Fornax 4) have closer to Solar-scaled alpha-element abundances. The abundance patterns in SC7 are remarkably similar to those in the Galactic GC Ruprecht 106, including significantly sub-solar [Na/Fe] and [Ni/Fe] ratios. In NGC 147, the GCs with [Fe/H]←2.0 account for about 6% of the total luminosity of stars in the same metallicity range, a lower fraction than those previously found in the Fornax and WLM galaxies, but substantially higher than in the Milky Way halo. Description: New observations of globular clusters in NGC 147 and NGC 6822 were obtained with the HIRES spectrograph on the Keck I telescope on 5 Oct 2015 and 25 Sep 2016. We also include older HIRES observations of four GCs in M33. The spectra are the same as those used by Larsen et al. (2002AJ....124.2615L). In addition to the HIRES observations, we include our previously published VLT/UVES spectra of GCs in the Fornax and WLM galaxies (Larsen et al. 2012A&A...546A..53L, 2014A&A...565A..98L) and we refer to our previous papers for details on the observational strategy and data reduction. These tables contain the individual abundance measurements for each cluster. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 90 16 Log of observations tablea1.dat 36 89 Abundances for NGC 147 Hodge II tablea2.dat 36 89 Abundances for NGC 147 Hodge III tablea3.dat 36 88 Abundances for NGC 147 PA-1 tablea4.dat 36 89 Abundances for NGC 147 PA-2 tablea5.dat 36 89 Abundances for NGC 147 SD7 tablea6.dat 36 90 Abundances for NGC 6822 SC6 tablea7.dat 36 89 Abundances for NGC 6822 SC7 tablea8.dat 36 87 Abundances for M33 H38 tablea9.dat 36 88 Abundances for M33 M9 tablea10.dat 36 88 Abundances for M33 R12 tablea11.dat 36 88 Abundances for M33 U49 tablea12.dat 36 65 Abundances for WLM GC tablea13.dat 36 67 Abundances for Fornax 3 tablea14.dat 36 67 Abundances for Fornax 4 tablea15.dat 36 67 Abundances for Fornax 5
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 12 A12 --- Cluster Cluster name 14- 17 F4.1 mag Vmag ? Integrated visual magnitude 19 A1 --- r_Vmag Reference for Vmag (1) 21- 31 A11 "DD/MMM/YYYY" Date Observation date 33- 41 A9 s Texp Exosure time 43- 46 I4 km/s HRV ? Heliocentric radial velocity 48- 50 F3.1 km/s sigma ? One-dimensional velocity dispersion, corrected for instrumental resolution 52- 63 A12 --- Table Name of the table with abundances 65- 90 A26 --- SName Simbad name
Note (1): References as follows: 1 = Larsen et al. (2002AJ....124.2615L) 2 = Veljanoski et al. (2013MNRAS.435.3654V) 3 = Veljanoski et al. (2015MNRAS.452..320V)
Byte-by-byte Description of file: tablea*.dat
Bytes Format Units Label Explanations
1- 7 A7 --- El Element ratio 9- 14 F6.1 0.1nm lambda1 Starting wavelength of spectral window 16- 21 F6.1 0.1nm lambda2 Ending wavelength of spectral window 23 A1 --- l_Abd Limit flag on Abd 24- 29 F6.3 [-] Abd ?=-9.999 Abundance (dex) (1) 31- 36 F6.3 [-] e_Abd ?=-9.999 Abundance error (dex) (2)
Note (1): A value of -9.999 indicates that the fit did not converge. Note (2): A value of -9.999 indicates that the fit did not converge or that only an upper limit could be determined.
Acknowledgements: Soeren Larsen, s.larsen(at)astro.ru.nl
(End) Soeren Larsen [Radboud University], Patricia Vannier [CDS] 11-Jan-2018
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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