J/A+A/619/A176 Chemical composition of Ruprecht 147 (Bragaglia+, 2018) ================================================================================ The chemical composition of the oldest nearby open cluster Ruprecht 147. Bragaglia A., Fu X., Mucciarelli A., Andreuzzi G., Donati P. =2018A&A...619A.176B (SIMBAD/NED BibCode) ================================================================================ ADC_Keywords: Clusters, open ; Milky Way; Abundances ; HR diagrams; Spectroscopy Keywords: stars: abundances - stars: evolution - open clusters and association: general - open clusters and associations: individual: Ruprecht 147 Abstract: Ruprecht 147 (NGC 6774) is the closest old open cluster, with a distance of less than 300pc and an age of about 2.5Gyr. It is therefore well suited for testing stellar evolution models and for obtaining precise and detailed chemical abundance information. We combined photometric and astrometric information coming from literature and the Gaia mission with very high-resolution optical spectra of stars in different evolutionary stages to derive the cluster distance, age, and detailed chemical composition. We obtained spectra of six red giants using HARPS-N at the Telescopio Nazionale Galileo (TNG). We also used European Southern Observatory (ESO) archive spectra of 22 main sequence (MS) stars, observed with HARPS at the 3.6m telescope. The very high resolution (115000) and the large wavelength coverage (about 380-680nm) of the twin instruments permitted us to derive atmospheric parameters, metallicity, and detailed chemical abundances of 23 species from all nucleosynthetic channels. We employed both equivalent widths and spectrum synthesis. We also re-derived the cluster distance and age using Gaia parallaxes, proper motions, and photometry in conjunction with the PARSEC stellar evolutionary models. We fully analysed those stars with radial velocity and proper motion/parallax in agreement with the cluster mean values. We also discarded one binary not previously recognised, and six stars near the MS turn-off because of their high rotation velocity. Our final sample consists of 21 stars (six giants and 15 MS stars). We measured metallicity (the cluster average [Fe/H] is +0.08, rms=0.07) and abundances of light, alpha, Fe-peak, and neutron-capture elements. The Li abundance follows the expectations, showing a tight relation between temperature and abundance on the MS, at variance with M67, and we did not detect any Li-rich giant. Description: Abundances of Fe and chemical elements are presented for 6 giants and 15 main sequence stars, based on high-resolution spectra and EW/synthetic spectrum analysis. Astrometric information from the Gaia mission is added. Objects: ------------------------------------------------- RA (2000) DE Designation(s) ------------------------------------------------- 19 16 42 -16 17.0 Ruprecht 147 = NGC 6774 ------------------------------------------------- File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table1.dat 142 6 Information on the 6 giants table2.dat 117 22 Information on the main sequence stars table3.dat 89 28 RV, Vrot, atmospheric parameters table4.dat 100 22 *Light, alpha element abundances (+ Sun) table5.dat 58 22 *Fe-peak element abundances ( +Sun) table6.dat 63 22 *Neutron-capture element abundances (+ Sun) table8.dat 44 23 Mean [X/Fe] for giants, dwarfs, total sample -------------------------------------------------------------------------------- Note on table4.dat, table5.dat, table6.dat: data for Sun from Grevesse et al, 2007, Space Sci. Rev., 130, 105. -------------------------------------------------------------------------------- See also: J/AJ/145/134 : Radial velocities of 108 stars in Ruprecht 147 (Curtis+, 2013) Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 2 I2 --- CWW Curtis et al. (2013, Cat. J/AJ/145/134) ID 4- 22 I19 --- Gaia Gaia DR2 (Cat. I/335) ID 24- 25 I2 h RAh Right ascension (J2000.0) 27- 28 I2 min RAm Right ascension (J2000.0) 30- 35 F6.3 s RAs Right ascension (J2000.0) 37 A1 --- DE- Declination sign (J2000.0) 38- 39 I2 deg DEd Declination (J2000.0) 41- 42 I2 arcmin DEm Declination (J2000.0) 44- 48 F5.2 arcsec DEs Declination (J2000.0) 50- 53 I4 s Exptime Exposure time (1) 55- 64 A10 "date" Obs.Date Observation date 66- 77 A12 "h:m:s" Obs.Time Observaiton time (beginning obs) (hh:mm:ss.sss) 79- 83 F5.3 mas Plx Gaia DR2 Parallax 85- 89 F5.3 mas e_Plx Error on Gaia Plx 91- 96 F6.3 mas/yr pmRA Gaia DR2 proper motion along RA, pmRA*cosDE 98-102 F5.3 mas/yr e_pmRA Error on Gaia DR2 pmRA 104-110 F7.3 mas/yr pmDE Gaia DR2 proper motion along DE 112-116 F5.3 mas/yr e_pmDE Error on Gaia DR2 pmDE 118-121 F4.2 mag Gmag Gaia DR2 G magnitude 123-126 F4.2 mag GBPmag Gaia DR2 G_BP magnitude 128-131 F4.2 mag GRPmag Gaia DR2 G_RP magnitude 133-137 F5.2 km/s RV Gaia DR2 radial velocity 139-142 F4.2 km/s e_RV Error on Gaia DR2 RV -------------------------------------------------------------------------------- Note (1): Observing programme: A33DDT0 -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 2 I2 --- CWW Curtis et al. (2013, Cat. J/AJ/145/134) ID 4- 22 I19 --- Gaia Gaia DR2 (Cat. I/345) ID 24- 25 I2 h RAh Right ascension (J2000.0) 27- 28 I2 min RAm Right ascension (J2000.0) 30- 34 F5.2 s RAs Right ascension (J2000.0) 36 A1 --- DE- Declination sign (J2000.0) 37- 38 I2 deg DEd Declination (J2000.0) 40- 41 I2 arcmin DEm Declination (J2000.0) 43- 47 F5.2 arcsec DEs Declination (J2000.0) 48- 49 I2 --- Nr Number of exposures in ESO ADP archive (1) 51- 55 F5.3 mas Plx Gaia DR2 Parallax 57- 61 F5.3 mas e_Plx Error on Gaia Plx 63- 68 F6.3 mas/yr pmRA Gaia DR2 proper motion along RA, pmRA*cosDE 70- 74 F5.3 mas/yr e_pmRA Error on Gaia DR2 pmRA 76- 82 F7.3 mas/yr pmDE Gaia DR2 proper motion along DE 84- 88 F5.3 mas/yr e_pmDE Error on Gaia DR2 pmDE 90- 94 F5.2 mag Gmag Gaia DR2 G magnitude 96-100 F5.2 mag GBPmag Gaia DR2 G_BP magnitude 102-106 F5.2 mag GRPmag Gaia DR2 G_RP magnitude 108-112 F5.2 km/s RV ? Gaia DR2 radial velocity 114-117 F4.2 km/s e_RV ? Error on Gaia DR2 RV -------------------------------------------------------------------------------- Note (1): Observing Programmes 091.C-0471, 093.C-0540, and 095.C-0947. -------------------------------------------------------------------------------- Byte-by-byte Description of file: table3.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 2 I2 --- CWW Curtis et al. (2013, Cat. J/AJ/145/134) ID 3 A1 --- n_CWW [*] * CWW58 is binary 4- 6 I3 --- SNR Signal-to-noise ratio 8- 12 F5.2 km/s RV Radial velocity 14- 17 F4.2 km/s e_RV Error on RV 19- 20 I2 --- Nr Number of spectra co-added 22- 25 I4 K Teff ? Effective temperature 27- 28 I2 K e_Teff ? Error on Teff 30- 33 F4.2 [cm/s2] logg ? Gravity 35- 38 F4.2 [cm/s2] e_logg ? Error on logg 40- 44 F5.2 [-] [M/H] ? Total metallicity 46- 49 F4.2 [-] e_[M/H] ? Error on metallicity 51- 54 F4.2 km/s xi ? Microturbulent velocity 56- 59 F4.2 km/s e_xi ? Error on xi 61- 63 I3 --- nFeI ? Number of FeI lines 65- 66 I2 --- nFeII ? Number of FeII lines 67- 71 F5.2 km/s vsini ? Rotation velocity 73- 76 F4.2 km/s e_vsini ? Error on vsini 78- 79 A2 --- Inst Instrument (1) 81- 84 F4.2 Msun Mass ? Mass from isochrone 86- 89 F4.2 Msun e_Mass ? Error on mass -------------------------------------------------------------------------------- Note (1): Instruments as follows: HN = HARPS-N H = HARPS -------------------------------------------------------------------------------- Byte-by-byte Description of file: table4.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 2 I2 --- CWW Curtis et al. (2013, Cat. J/AJ/145/134) ID (0 for Sun) 5- 8 F4.2 --- LiLTE LiI (LTE) abundance 10 A1 --- l_LiNLTE Upper limit flag in LiNLTE 12- 15 F4.2 --- LiNLTE ? LiI (NLTE) abundance 17- 20 F4.2 --- O ? Oxygen abundance 22- 25 F4.2 --- NaLTE Sodium (LTE) abundance 27- 30 F4.2 --- e_NaLTE ? rms uncertainty on Na (LTE) 32- 35 F4.2 --- NaNLTE ? Sodium (NLTE) abundance 37- 40 F4.2 --- e_NaNLTE ? rms uncertainty on Na (NLTE) 42- 45 F4.2 --- Mg Magnesium abundance 47- 50 F4.2 --- e_Mg ? rms uncertainty on Mg 52- 55 F4.2 --- Al Aluminum abundance 57- 60 F4.2 --- e_Al ? rms uncertainty on Al 62- 65 F4.2 --- Si Silicon abundance 67- 70 F4.2 --- e_Si ? rms uncertainty on Si 72- 75 F4.2 --- Ca Calcium abundance 77- 80 F4.2 --- e_Ca ? rms uncertainty on Ca 82- 85 F4.2 --- TiI Titanium I abundance 87- 90 F4.2 --- e_TiI ? rms uncertainty on TiI 92- 95 F4.2 --- TiII Titanium II abundance 97-100 F4.2 --- e_TiII ? rms uncertainty on TiII -------------------------------------------------------------------------------- Byte-by-byte Description of file: table5.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 2 I2 --- CWW Curtis et al. (2013, Cat. J/AJ/145/134) ID (0 for Sun) 5- 8 F4.2 --- ScI Scandium I abundance 10- 13 F4.2 --- e_ScI ? rms uncertainty on ScI 15- 18 F4.2 --- V Vanadium abundance 20- 23 F4.2 --- e_V ? rms uncertainty on V 25- 28 F4.2 --- Co Cobalt abundance 30- 33 F4.2 --- e_Co ? rms uncertainty on Co 35- 38 F4.2 --- Ni Nichel abundance 40- 43 F4.2 --- e_Ni ? rms uncertainty on Ni 45- 48 F4.2 --- Cu Copper abundance 50- 53 F4.2 --- e_Cu ? rms uncertainty on Cu 55- 58 F4.2 --- Zn Zinc abundance -------------------------------------------------------------------------------- Byte-by-byte Description of file: table6.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 2 I2 --- CWW Curtis et al. (2013, Cat. J/AJ/145/134) ID (0 for Sun) 5- 8 F4.2 --- Y Yttrium II abundance 10- 13 F4.2 --- e_Y ? rms uncertainty on Y II 15- 18 F4.2 --- ZrI Zirconium I abundance 20- 23 F4.2 --- ZrII Zirconium II abundance 25- 28 F4.2 --- e_ZrII ? rms uncertainty on Zr II 30- 33 F4.2 --- Ba Barium II abundance 35- 38 F4.2 --- e_Ba ? rms uncertainty on Ba II 40- 43 F4.2 --- La Lanthanum II abundance 45- 48 F4.2 --- e_La ? rms uncertainty on La II 50- 53 F4.2 --- Ce Cerium II abundance 55- 58 F4.2 --- e_Ce ? rms uncertainty on Ce II 60- 63 F4.2 --- Eu Europium II abundance -------------------------------------------------------------------------------- Byte-by-byte Description of file: table8.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 3 A3 --- [X/Fe] Parameter [X/Fe] (for Fe: [Fe/H]) 5- 9 F5.2 --- meanG Mean [X/Fe] for giants 11- 14 F4.2 --- rmsG rms uncertainty on [X/Fe] for giants 16 I1 --- NrG Number of giants 18- 22 F5.2 --- meanD ? Mean [X/Fe] for dwarfs 24- 27 F4.2 --- rmsD ? rms uncertainty on [X/Fe] for dwarfs 29- 30 I2 --- NrD ? Number of dwarfs 32- 36 F5.2 --- mean Mean [X/Fe] for total sample 38- 41 F4.2 --- rms rms uncertainty on mean [X/Fe] for total sample 43- 44 I2 --- Nr Number of stars for total sample -------------------------------------------------------------------------------- Acknowledgements: Angela Bragaglia, angela.bragaglia(at)inaf.it ================================================================================ (End) Patricia Vannier [CDS] 24-Sep-2018