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.
<Astron. Astrophys. 619, A176 (2018)>
=2018A&A...619A.176B 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:
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RA (2000) DE Designation(s)
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19 16 42 -16 17.0 Ruprecht 147 = NGC 6774
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File Summary:
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FileName Lrecl Records Explanations
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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
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Note on table4.dat, table5.dat, table6.dat:
data for Sun from Grevesse et al, 2007, Space Sci. Rev., 130, 105.
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See also:
J/AJ/145/134 : Radial velocities of 108 stars in Ruprecht 147 (Curtis+, 2013)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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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
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Note (1): Observing programme: A33DDT0
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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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
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Note (1): Observing Programmes 091.C-0471, 093.C-0540, and 095.C-0947.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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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
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Note (1): Instruments as follows:
HN = HARPS-N
H = HARPS
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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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
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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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
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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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
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Byte-by-byte Description of file: table8.dat
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Bytes Format Units Label Explanations
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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
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Acknowledgements:
Angela Bragaglia, angela.bragaglia(at)inaf.it
(End) Patricia Vannier [CDS] 24-Sep-2018