J/ApJ/824/75 Abundances in 23 open clusters. I. (Overbeek+, 2016)
New neutron-capture measurements in 23 open clusters. I. The r-process.
Overbeek J.C., Friel E.D., Jacobson H.R.
<Astrophys. J., 824, 75-75 (2016)>
=2016ApJ...824...75O 2016ApJ...824...75O (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, open ; Abundances ; Equivalent widths
Keywords: Galaxy: abundances; open clusters and associations: general;
stars: abundances
Abstract:
Neutron-capture elements, those with Z>35, are the least well
understood in terms of nucleosynthesis and formation environments. The
rapid neutron-capture, or r-process, elements are formed in the
environments and/or remnants of massive stars, while the slow
neutron-capture, or s-process, elements are primarily formed in
low-mass AGB stars. These elements can provide much information about
Galactic star formation and enrichment, but observational data are
limited. We have assembled a sample of 68 stars in 23 open clusters
that we use to probe abundance trends for six neutron-capture elements
(Eu, Gd, Dy, Mo, Pr, and Nd) with cluster age and location in the disk
of the Galaxy. In order to keep our analysis as homogeneous as
possible, we use an automated synthesis fitting program, which also
enables us to measure multiple (3-10) lines for each element. We find
that the pure r-process elements (Eu, Gd, and Dy) have positive trends
with increasing cluster age, while the mixed r- and s-process elements
(Mo, Pr, and Nd) have insignificant trends consistent with zero. Pr,
Nd, Eu, Gd, and Dy have similar, slight (although mostly statistically
significant) gradients of ∼0.04dex/kpc. The mixed elements also appear
to have nonlinear relationships with RGC.
Description:
Our open cluster (OC) data set is comprised mainly of KPNO 4m, CTIO,
and HET spectra taken in past observing runs (described in Friel et
al. 2003AJ....126.2372F 2003AJ....126.2372F, 2005, J/AJ/129/2725; Jacobson et al.
2008AJ....135.2341J 2008AJ....135.2341J, 2009, J/AJ/137/4753; Friel et al. 2010,
J/AJ/139/1942; Jacobson & Friel 2013, J/AJ/145/107). These are
observations of red giants in Be17, Be39, Cr261, M67, NGC188, NGC1193,
NGC1245, NGC1817, NGC1883, NGC2141, NGC2158, NGC2194, NGC2355,
NGC6939, and NGC7142.
We have also obtained Keck spectra of five clusters, Be18, Be21, Be22,
Be32, and PWM4, and CTIO spectra for Be31, courtesy of D. Yong (see
Yong et al. 2005AJ....130..597Y 2005AJ....130..597Y, 2012, J/AJ/144/95 for details). We
have McDonald 2.7m spectra of five stars in NGC 7789 courtesy of
M. Briley (2013, private communication), and VLT UVES spectra of four
stars in NGC 6192 from L. Magrini (see Magrini et al. 2010,
J/A+A/523/A11, for details).
We have 23 OCs total in our sample, which are summarized in Table 1.
The signal-to-noise ratio (S/N) of these data range from 60 to 180 per
pixel, and the resolution ranges from R∼25000 (older KPNO data) to
R∼47000 (UVES, Keck, and McDonald data).
We have recently taken additional spectra of two stars each in
NGC1817, NGC2141, and NGC6939 with the Apache Point Observatory (APO)
3.5m telescope. Our APO data were taken on the nights of 2014 November
16 (NGC 1817 and NGC 6939), 2015 January 6, 15, 26, and 28 (NGC 2141).
We used the ARC Echelle Spectrograph on standard settings
(3200-10000Å, R∼32000).
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
stars.dat 53 68 List of stars with abundance measurements;
table added by CDS
table1.dat 61 23 Clusters in the sample
table2.dat 87 9 APO spectroscopic observations
table3.dat 132 98 Fe linelist parameters and equivalent width
measurements
table4.dat 66 31 Atmospheric parameters of newly analyzed stars
(for seven clusters)
table6.dat 184 68 Line-by-line abundances
table7.dat 76 68 Average stellar abundances
table9.dat 83 23 Cluster average abundances
--------------------------------------------------------------------------------
See also:
J/AJ/149/15 : Spectroscopy of NGC 7789 (Overbeek+, 2015)
J/MNRAS/431/3338 : Abundances of red giants in open clusters (Reddy+, 2013)
J/AJ/145/107 : Zr, Ba, La, & Eu abundances in 19 OCs (Jacobson+, 2013)
J/A+A/548/A55 : C & O isotopic ratios in Arcturus and Aldebaran (Abia+ 2012)
J/AJ/144/95 : Abundance in outer galactic disk stars. IV. (Yong+, 2012)
J/MNRAS/422/3527 : Equivalent widths of 11 NGC 3680 stars (Mitschang+, 2012)
J/MNRAS/419/1350 : Red giants abundances in 4 open clusters (Reddy+, 2012)
J/A+A/535/A30 : Chemical abundance of 12 stars in OCs (Carrera+, 2011)
J/AJ/142/136 : Spectroscopy of Cepheids. l=30-250° (Luck+, 2011)
J/MNRAS/416/1077 : Photometry of 3 open clusters (Cignoni+ 2011)
J/AJ/142/59 : Chemical abundance in 10 open clusters (Jacobson+, 2011)
J/A+A/523/A11 : Open clusters towards the Galactic center (Magrini+, 2010)
J/MNRAS/407/2109 : Kinematic study of open clusters (Vande Putte+, 2010)
J/AJ/139/1942 : EWs of red giants in 6 open clusters (Friel+, 2010)
J/A+A/511/A56 : Abundances of five open clusters (Pancino+, 2010)
J/MNRAS/399/2146 : Orbits of open clusters in the Galaxy (Wu+, 2009)
J/AJ/137/4753 : Red giants EWs in 4 open clusters (Jacobson+, 2009)
J/ApJS/182/80 : Rare earth abundances (Sneden+, 2009)
J/AJ/134/1216 : NGC 7142, 6939, & IC 4756 star abundances (Jacobson+, 2007)
J/AZh/84/429 : Abundances in atmospheres of cool giants (Mishenina+, 2007)
J/ApJS/167/292 : Transition probabilities for Gd II (Den Hartog+, 2006)
J/MNRAS/367/1329 : Elemental abundances for 176 stars (Reddy+, 2006)
J/AJ/129/2725 : EWs of red giants in Berkeley 17 (Friel+, 2005)
J/A+A/431/933 : Abundances of NGC 7789 evolved stars (Tautvaisiene+, 2005)
J/PASJ/56/295 : BVIc photometry of old open clusters (Hasegawa+, 2004)
J/A+A/413/159 : Galactic abundance gradient. V. (Andrievsky+, 2004)
J/MNRAS/340/304 : [X/Fe] of Galactic disc F and G dwarfs (Reddy+, 2003)
J/A+A/399/105 : RVs of red giants in NGC 1817 (Mermilliod+, 2003)
J/A+A/392/491 : Galactic abundance gradient. III. (Andrievsky+, 2002)
J/A+A/381/32 : Galactic Cepheid abundances (Andrievsky+, 2002)
J/A+A/360/499 : Equivalent widths of 9 stars of M 67 (Tautvaisiene+, 2000)
J/AJ/106/220 : UBVI photometry in Berkeley 31 (Guetter 1993)
Byte-by-byte Description of file: stars.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- Cl Cluster name
7- 10 A4 --- Star Star identification
12- 13 I2 h RAh ? Hour of right ascension (J2000) (1)
15- 16 I2 min RAm ? Minute of right ascension (J2000)
18- 22 F5.2 s RAs ? Second of right ascension (J2000)
24 A1 --- DE- Sign of declination (J2000) (1)
25- 26 I2 deg DEd ? Degree of declination (J2000) (1)
28- 29 I2 arcmin DEm ? Arcminute of declination (J2000)
31- 34 F4.1 arcsec DEs ? Arcsecond of declination (J2000)
36- 53 A18 --- Ref Star reference(s) (2)
--------------------------------------------------------------------------------
Note (1): Coordinates retrieved by CDS from references; sometimes from WEBDA or
SIMBAD.
Note (2): Reference as follows:
n = stars with APO spectroscopic observations from table2.dat in this paper
a = newly analyzed star from table4.dat in this paper
C05 = Carretta et al. (2005A&A...441..131C 2005A&A...441..131C)
F03 = Friel et al. 2003AJ....126.2372F 2003AJ....126.2372F
F05 = Friel et al. 2005, J/AJ/129/2725
F10 = Friel et al. 2010, J/AJ/139/1942
J08 = Jacobson et al. 2008AJ....135.2341J 2008AJ....135.2341J
J09 = Jacobson et al. 2009, J/AJ/137/4753
J13 = Jacobson & Friel 2013, J/AJ/145/107
JFP07 = Jacobson et al. 2007, J/AJ/134/1216
M03 = Mermilliod et al. 2003, J/A+A/399/105
M10 = Magrini et al. 2010, J/A+A/523/A11
MN07 = Maciejewski & Niedzielski 2007A&A...467.1065M 2007A&A...467.1065M
M94 = Milone A.A.E. 1994PASP..106.1085M 1994PASP..106.1085M
T05 = Tautvaisiene et al. 2005, J/A+A/431/933
Y05 = Yong et al. 2005AJ....130..597Y 2005AJ....130..597Y
Y12 = Yong et al. 2012, J/AJ/144/95
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- Cl Cluster designation
7 A1 --- f_Age [c] Flag on Age (1)
9- 13 F5.1 deg GLON Galactic longitude
15- 19 F5.1 deg GLAT Galactic latitude
21- 23 F3.1 kpc Dist [0.9/8.3] Heliocentric distance
25- 28 F4.1 Gyr Age [0.2/10.1] Age
30- 33 F4.1 kpc Rgc [7.1/16.3] Galactocentric radius (2)
35- 39 A5 --- Ref Reference(s) (3)
41- 43 A3 --- Ns [ ,1-5] Number of stars per observation
45- 61 A17 --- Tel Telescope(s) used for the observation
--------------------------------------------------------------------------------
Note (1):
c = Cluster age not taken from Salaris et al. (2004A&A...414..163S 2004A&A...414..163S)
(see the text for details).
Note (2): RGC,☉=8.5kpc.
Note (3): Reference for distances as follows:
A04 = Andreuzzi et al. 2004MNRAS.348..297A 2004MNRAS.348..297A
C11 = Cignoni et al. 2011, J/MNRAS/416/1077
BT06 = Bragaglia & Tosi 2006AJ....131.1544B 2006AJ....131.1544B
C06 = Claria et al. 2006A&A...453...91C 2006A&A...453...91C
F05 = Friel et al. 2005, J/AJ/129/2725
FJP10 = Friel et al. 2010, J/AJ/139/1942
J08 = Jacobson et al. 2008AJ....135.2341J 2008AJ....135.2341J
J09 = Jacobson et al. 2009, J/AJ/137/4753
J11 = Jacobson et al. 2011, J/AJ/142/59
Y05 = Yong et al. 2005AJ....130..597Y 2005AJ....130..597Y
Y12 = Yong et al. 2012, J/AJ/144/95.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- Cl Cluster name
7- 10 I4 --- Star [53/1821] Star number
12- 13 I2 h RAh Hour of right ascension (J2000)
15- 16 I2 min RAm Minute of right ascension (J2000)
18- 22 F5.2 s RAs Second of right ascension (J2000)
24 A1 --- DE- Sign of declination (J2000)
25- 26 I2 deg DEd Degree of declination (J2000)
28- 29 I2 arcmin DEm Arcminute of declination (J2000)
31- 34 F4.1 arcsec DEs Arcsecond of declination (J2000)
36- 40 F5.2 mag Vmag [11.4/14.2]? V-band magnitude
42- 45 A4 --- r_Vmag Photometry reference (1)
47- 57 A11 "Y/M/D" Date UT date of observation
59- 64 A6 s Exp Exposure times
66- 70 F5.1 km/s Vr [-20.1/66]? Radial velocity from literature
72- 74 F3.1 km/s e_Vr [0.4/1]? Vr uncertainty
76- 78 A3 --- r_Vr Vr reference (1)
80- 84 F5.1 km/s RVel [-23.6/64.7] Measured Vr
86- 87 I2 --- S/N [76/93]? Signal to noise ratio
--------------------------------------------------------------------------------
Note (1): Reference as follows:
M03 = Mermilliod et al. 2003, J/A+A/399/105;
MN07 = Maciejewski & Niedzielski 2007A&A...467.1065M 2007A&A...467.1065M;
M94 = Milone A.A.E. 1994PASP..106.1085M 1994PASP..106.1085M;
Y05 = Yong et al. 2005AJ....130..597Y 2005AJ....130..597Y
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 F7.2 0.1nm lambda [5234.6/6839.9] Wavelength of line
9- 12 F4.1 --- Sp [26/26.1] Atomic element & ionization number,
atomic_number.ionization e.g. 26.0=FeI
14- 17 F4.2 eV EP [0.8/5] Excitation potential
19- 24 F6.3 [-] log(gf) [-6.5/-0.1] Log of the oscillator strength
26- 30 F5.1 10-13m EW886 [10/137]? Equivalent widths for Be 31 star 886
32- 36 F5.1 10-13m EW1045 ? Equivalent widths for Cr 261 star 1045
38- 42 F5.1 10-13m EW1080 ? Equivalent widths for Cr 261 star 1080
44- 48 F5.1 10-13m EW206 ? Equivalent widths for N1817 star 206
50- 54 F5.1 10-13m EW1456 ? Equivalent widths for N1817 star 1456
56- 60 F5.1 10-13m EW514 ? Equivalent widths for N2141 star 514
62- 66 F5.1 10-13m EW1821 ? Equivalent widths for N2141 star 1821
68- 72 F5.1 10-13m EW9 ? Equivalent widths for N6192 star 9
74- 78 F5.1 10-13m EW45 ? Equivalent widths for N6192 star 45
80- 84 F5.1 10-13m EW96 ? Equivalent widths for N6192 star 96
86- 90 F5.1 10-13m EW137 [28/169]? Equivalent widths for N6192 star 137
92- 96 F5.1 10-13m EW53 ? Equivalent widths for N6939 star 53
98-102 F5.1 10-13m EW65 ? Equivalent widths for N6939 star 65
104-108 F5.1 10-13m EW212 ? Equivalent widths for N7789 star 212
110-114 F5.1 10-13m EW468 ? Equivalent widths for N7789 star 468
116-120 F5.1 10-13m EW605 [26/177]? Equivalent widths for N7789 star 605
122-126 F5.1 10-13m EW765 ? Equivalent widths for N7789 star 765
128-132 F5.1 10-13m EW958 ? Equivalent widths for N7789 star 958
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- Cl Cluster name
7- 10 I4 --- Star Star number within the cluster
12- 20 A9 --- Ref Source of Atmospheric Parameters (1)
22- 25 I4 K Teff [4190/5100] Derived stellar
effective temperature
27- 30 F4.2 [cm/s2] log(g) [1.3/3] Derived surface gravity
32- 35 F4.2 km/s xi [1/2.1] Derived microturbulent velocity
37- 40 F4.2 [Sun] FeI [6.9/7.7] Log FeI number abundance
relative to solar
42- 42 A1 --- f_FeI [a] Flag on FeI Source (2)
44- 47 F4.2 [-] e_FeI [0.07/0.3] Uncertainty in FeI, dex
49- 51 I3 --- o_FeI [22/126] Number of lines used to derive FeI
53- 56 F4.2 [Sun] FeII [7/7.7]? Log FeII number abundance
relative to solar
58- 58 A1 --- f_FeII [a] Flag on FeII Source (2)
60- 63 F4.2 [-] e_FeII [0.03/0.3]? Uncertainty in FeI, dex
65- 66 I2 --- o_FeII [3/14] Number of lines used to derive FeII
--------------------------------------------------------------------------------
Note (1): References for atmospheric parameters:
C05 = Carretta et al. (2005A&A...441..131C 2005A&A...441..131C);
F03 = Friel et al. (2003AJ....126.2372F 2003AJ....126.2372F);
JFP07 = Jacobson et al. 2007, J/AJ/134/1216;
M10 = Magrini et al. 2010, J/A+A/523/A11;
T05 = Tautvaisiene et al. 2005, J/A+A/431/933;
Y05 = Yong et al. (2005AJ....130..597Y 2005AJ....130..597Y)
Note (2):
a = Solar abundances are not given in Tautvaisiene+ 2005, J/A+A/431/933
so ε(Fe_Sun)=7.52 is assumed.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- Cl Cluster name
7- 10 A4 --- Star Star number within the cluster
12- 16 F5.2 [Sun] 4129[Eu/Fe] ? Eu to Fe ratio based on the 4129Å line
18- 22 F5.2 [Sun] 4205[Eu/Fe] ? Eu to Fe ratio based on the 4205Å line
24- 28 F5.2 [Sun] 6437[Eu/Fe] [-0.5/0.4]? Eu to Fe ratio based
on the 6437Å line
30- 34 F5.2 [Sun] 6645[Eu/Fe] ? Eu to Fe ratio based on the 6645Å line
36- 40 F5.2 [Sun] 4085[Gd/Fe] ? Gd to Fe ratio based on the 4085Å line
42- 46 F5.2 [Sun] 4191[Gd/Fe] ? Gd to Fe ratio based on the 4191Å line
48- 52 F5.2 [Sun] 4316[Gd/Fe] ? Gd to Fe ratio based on the 4316Å line
54- 58 F5.2 [Sun] 4483[Gd/Fe] [-0.07/0.5]? Gd to Fe ratio
based on the 4483Å line
60- 64 F5.2 [Sun] 4498[Gd/Fe] ? Gd to Fe ratio based on the 4498Å line
66- 70 F5.2 [Sun] 4073[Dy/Fe] ? Dy to Fe ratio based on the 4073Å line
72- 76 F5.2 [Sun] 4449[Dy/Fe] ? Dy to Fe ratio based on the 4449Å line
78- 82 F5.2 [Sun] 5169[Dy/Fe] ? Dy to Fe ratio based on the 5169Å line
84- 88 F5.2 [Sun] 5570[Mo/Fe] ? Mo to Fe ratio based on the 5570Å line
90- 94 F5.2 [Sun] 5751[Mo/Fe] ? Mo to Fe ratio based on the 5751Å line
96-100 F5.2 [Sun] 6030[Mo/Fe] ? Mo to Fe ratio based on the 6030Å line
102-106 F5.2 [Sun] 5219[Pr/Fe] ? Pr to Fe ratio based on the 5219Å line
108-112 F5.2 [Sun] 5259[Pr/Fe] ? Pr to Fe ratio based on the 5259Å line
114-118 F5.2 [Sun] 5322[Pr/Fe] ? Pr to Fe ratio based on the 5322Å line
120-124 F5.2 [Sun] 5352[Pr/Fe] ? Pr to Fe ratio based on the 5352Å line
126-130 F5.2 [Sun] 5132[Nd/Fe] ? Nd to Fe ratio based on the 5132Å line
132-136 F5.2 [Sun] 5306[Nd/Fe] ? Nd to Fe ratio based on the 5306Å line
138-142 F5.2 [Sun] 5356[Nd/Fe] ? Nd to Fe ratio based on the 5356Å line
144-148 F5.2 [Sun] 5416[Nd/Fe] ? Nd to Fe ratio based on the 5416Å line
150-154 F5.2 [Sun] 5431[Nd/Fe] ? Nd to Fe ratio based on the 5431Å line
156-160 F5.2 [Sun] 5485[Nd/Fe] ? Nd to Fe ratio based on the 5485Å line
162-166 F5.2 [Sun] 5533[Nd/Fe] ? Nd to Fe ratio based on the 5533Å line
168-172 F5.2 [Sun] 5740[Nd/Fe] [-0.2/0.7]? Nd to Fe ratio
based on the 5740Å line
174-178 F5.2 [Sun] 5811[Nd/Fe] ? Nd to Fe ratio based on the 5811Å line
180-184 F5.2 [Sun] 6385[Nd/Fe] ? Nd to Fe ratio based on the 6385Å line
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table7.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- Cl Cluster name
7- 10 A4 --- Star Star number within the cluster
12- 16 F5.2 [Sun] <[Eu/Fe]> [-0.4/0.3] Mean star [Eu/Fe] abundance
18- 21 F4.2 [Sun] e_<[Eu/Fe]> [0/0.2]? Uncertainty in <[Eu/Fe]> abundance
23- 27 F5.2 [Sun] <[Gd/Fe]> [-0.2/0.4]? Mean star [Gd/Fe] abundance
29- 32 F4.2 [Sun] e_<[Gd/Fe]> [0/0.3]? Uncertainty in <[Gd/Fe]> abundance
34- 38 F5.2 [Sun] <[Dy/Fe]> [-0.2/0.5]? Mean star [Dy/Fe] abundance
40- 43 F4.2 [Sun] e_<[Dy/Fe]> [0/0.2]? Uncertainty in <[Dy/Fe]> abundance
45- 49 F5.2 [Sun] <[Mo/Fe]> [-0.4/0.5] Mean star [Mo/Fe] abundance
51- 54 F4.2 [Sun] e_<[Mo/Fe]> [0.01/0.2]? Uncertainty in <[Mo/Fe]> abundance
56- 60 F5.2 [Sun] <[Pr/Fe]> [-0.3/0.4]? Mean star [Pr/Fe] abundance
62- 65 F4.2 [Sun] e_<[Pr/Fe]> [0.02/0.2]? Uncertainty in <[Pr/Fe]> abundance
67- 71 F5.2 [Sun] <[Nd/Fe]> [-0.3/0.6] Mean star [Nd/Fe] abundance
73- 76 F4.2 [Sun] e_<[Nd/Fe]> [0.03/0.2] Uncertainty in <[Nd/Fe]> abundance
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table9.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- Cl Cluster designation
7- 11 F5.2 [Sun] [Fe/H] Average [Fe/H]
12 A1 --- f_[Fe/H] [a] Flag on [Fe/H] (4)
14- 17 F4.2 [Sun] e_[Fe/H] [0/0.1]? [Fe/H] uncertainty
19- 23 F5.2 [Sun] [Eu/Fe] [-0.3/0.3] Average [Eu/Fe]
25- 28 F4.2 [Sun] e_[Eu/Fe] [0.01/0.1] [Eu/Fe] uncertainty
30- 34 F5.2 [Sun] [Gd/Fe] [-0.09/0.4]? Average [Gd/Fe]
36- 39 F4.2 [Sun] e_[Gd/Fe] [0.01/0.2]? [Gd/Fe] uncertainty
41- 45 F5.2 [Sun] [Dy/Fe] [-0.2/0.4]? Average [Dy/Fe]
47- 50 F4.2 [Sun] e_[Dy/Fe] [0/0.07]? [Dy/Fe] uncertainty
52- 56 F5.2 [Sun] [Mo/Fe] [-0.1/0.5] Average [Mo/Fe]
58- 61 F4.2 [Sun] e_[Mo/Fe] [0.03/0.3] [Mo/Fe] uncertainty
63- 67 F5.2 [Sun] [Pr/Fe] [-0.3/0.3]? Average [Pr/Fe]
69- 72 F4.2 [Sun] e_[Pr/Fe] [0.01/0.14]? [Pr/Fe] uncertainty
74- 78 F5.2 [Sun] [Nd/Fe] [-0.1/0.6] Average [Nd/Fe]
80- 83 F4.2 [Sun] e_[Nd/Fe] [0/0.14] [Nd/Fe] uncertainty
--------------------------------------------------------------------------------
Note (4):
a = Based on stellar [Fe/H] measurements presented here as well as those
in Jacobson & Friel (2013, J/AJ/145/107).
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 17-Aug-2016