J/MNRAS/503/3279 GALAH survey. Galactic disc with open clusters (Spina+, 2021)
The GALAH survey: tracing the Galactic disc with open clusters.
Spina L., Ting Y.-S., De Silva G.M., Frankel N., Sharma S.,
Cantat-Gaudin T., Joyce M., Stello D., Karakas A.I., Asplund M.B.,
Nordlander T., Casagrande L., D'Orazi V., Casey A.R., Cottrell P.,
Tepper-Garcia T., Baratella M., Kos J., Cotar K., Bland-Hawthorn J.,
Buder S., Freeman K.C., Hayden M.R., Lewis G.F., Lin J., Lind K.,
Martell S.L., Schlesinger K.J., Simpson J.D., Zucker D.B., Zwitter T.
<Mon. Not. R. Astron. Soc., 503, 3279-3296 (2021)>
=2021MNRAS.503.3279S 2021MNRAS.503.3279S (SIMBAD/NED BibCode)
ADC_Keywords: Milky Way ; Clusters, open ; Abundances
Keywords: stars: abundances - stars: kinematics and dynamics -
Galaxy: abundances - Galaxy: disc - Galaxy: evolution -
open clusters and associations: general
Abstract:
Open clusters are unique tracers of the history of our own Galaxy's
disc. According to our membership analysis based on Gaia astrometry,
out of the 226 potential clusters falling in the footprint of the
GALactic Archaeology with HERMES (GALAH) survey or the Apache Point
Observatory Galactic Evolution Experiment (APOGEE) survey, we find
that 205 have secure members that were observed by at least one of the
surveys. Furthermore, members of 134 clusters have high-quality
spectroscopic data that we use to determine their chemical
composition. We leverage this information to study the chemical
distribution throughout the Galactic disc of 21 elements, from C to
Eu. The radial metallicity gradient obtained from our analysis is
-0.076±0.009dex/kpc, which is in agreement with previous works based
on smaller samples. Furthermore, the gradient in the [Fe/H]-guiding
radius (rguid) plane is -0.073±0.008dex/kpc. We show consistently
that open clusters trace the distribution of chemical elements
throughout the Galactic disc differently than field stars. In
particular, at the given radius, open clusters show an age-metallicity
relation that has less scatter than field stars. As such scatter is
often interpreted as an effect of radial migration, we suggest that
these differences are due to the physical selection effect imposed by
our Galaxy: clusters that would have migrated significantly also had
higher chances to get destroyed. Finally, our results reveal trends in
the [X/Fe]-rguid-age space, which are important to understand
production rates of different elements as a function of space and
time.
Description:
In this study, we make use of three data sets: Gaia DR2 (Gaia
Collaboration, 2018A&A...616A...1G 2018A&A...616A...1G, Cat. I/345), APOGEE DR16 (Ahumada
et al., 2020ApJS..249....3A 2020ApJS..249....3A) and GALAH+ (Wittenmyer et al.,
2018AJ....155...84W 2018AJ....155...84W; Sharma et al., 2018, Cat. J/MNRAS/473/2004,
2019MNRAS.490.5335S 2019MNRAS.490.5335S; Buder et al., 2020, arXiv:2011.02505).
In this work, we used astrometric information from Gaia to identify
the stellar members of the 226 open clusters that potentially fall in
the footprints of the APOGEE or GALAH survey.
Stellar coordinates and astrometric solutions from Gaia are used for
cluster membership analysis. Radial velocities (RVs) provided by
either Gaia, APOGEE, or GALAH.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 607 105684 Cluster membership probabilities analysis and
cross-match with the GALAH and APOGEE data sets
for 226 clusters
table2.dat 452 205 Physical and kinematic properties of open clusters
table3.dat 380 134 Chemical properties of open clusters
--------------------------------------------------------------------------------
See also:
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
III/284 : APOGEE-2 data from DR16 (Johnsson+, 2020)
J/A+A/640/A1 : Portrait Galactic disc (Cantat-Gaudin+, 2020)
J/MNRAS/478/4513 : GALAH Survey DR2 (Buder+, 2018)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 F11.7 deg RAdeg [0.0/360.0] Right Ascension (J2000)
13- 23 F11.7 deg DEdeg [-76.62/85.94] Declination (J2000)
25- 43 I19 --- GaiaDR2 Gaia DR2 source id
45- 59 I15 --- GALAH ? GALAH sobject id
61- 78 A18 --- APOGEE APOGEE ID
80- 92 A13 --- Cluster Cluster name
94- 97 F4.2 --- Pmem [0/1] Membership Probability (this work)
99-101 F3.1 --- PmemCG20 [0/1] Membership Probability (Cantat-Gaudin
et al., 2020, Cat. J/A+A/640/A1)
103-109 F7.1 K Teff [4003/6997]? Effective temperature
111-116 F6.1 K e_Teff [65/208]? Error on Effective temperature
118-123 F6.3 [m/s2] logg [0.86/4.98]? Surface gravity
125-130 F6.3 [m/s2] e_logg [0.02/7.95]? Error on Surface gravity
132-137 F6.3 --- [Fe/H] [-1.0/0.44]? Metallicity [Fe/H]
139-144 F6.3 --- e_[Fe/H] [0/0.4]? Error on [Fe/H]
146-151 A6 --- r_param Origin for Stellar Parameters
(apogee or galah)
153-158 F6.3 km/s vt [0.3/2.5]? Microturbolence velocity
160-167 F8.3 m/s RV [-987.82/845.37]? Radial Velocity
169-174 A6 --- r_RV Origin for Radial Velocity
(apogee, gaia or galah)
176-181 F6.3 --- [C/Fe] [-0.67/1.21]? [C/Fe] abundance
183-188 F6.3 --- e_[C/Fe] [0/0.22]? Error on [C/Fe]
190-195 A6 --- r_[C/Fe] Origin for [C/Fe] (apogee or galah)
197-202 F6.3 --- [O/Fe] [-1.61/2.44]? [O/Fe] abundance
204-209 F6.3 --- e_[O/Fe] [0.0/0.29]? Error on [O/Fe]
211-216 A6 --- r_[O/Fe] Origin for [O/Fe] (apogee or galah)
218-223 F6.3 --- [Na/Fe] [-1.79/1.4]? [Na/Fe] abundance
225-230 F6.3 --- e_[Na/Fe] [0.02/0.3]? Error on [Na/Fe]
232-237 A6 --- r_[Na/Fe] Origin for [Na/Fe] (apogee or galah)
239-244 F6.3 --- [Mg/Fe] [-0.8/1.36]? [Mg/Fe] abundance
246-251 F6.3 --- e_[Mg/Fe] [0/0.33]? Error on [Mg/Fe]
253-258 A6 --- r_[Mg/Fe] Origin for [Mg/Fe] (apogee or galah)
260-265 F6.3 --- [Al/Fe] [-2.36/2.02]? [Al/Fe] abundance
267-272 F6.3 --- e_[Al/Fe] [0.01/0.19]? Error on [Al/Fe]
274-279 A6 --- r_[Al/Fe] Origin for [Al/Fe] (apogee or galah)
281-286 F6.3 --- [Si/Fe] [-0.63/1.4]? [Si/Fe] abundance
288-293 F6.3 --- e_[Si/Fe] [0/0.3]? Error on [Si/Fe]
295-300 A6 --- r_[Si/Fe] Origin for [Si/Fe] (apogee or galah)
302-307 F6.3 --- [Ca/Fe] [-1.2/1.52]? [Ca/Fe] abundance
309-314 F6.3 --- e_[Ca/Fe] [0/0.26]? Error on [Ca/Fe]
316-321 A6 --- r_[Ca/Fe] Origin for [Ca/Fe] (apogee or galah)
323-328 F6.3 --- [Ti/Fe] [-0.93/2.13]? [Ti/Fe] abundance
330-335 F6.3 --- e_[Ti/Fe] [0.01/0.5]? Error on [Ti/Fe]
337-342 A6 --- r_[Ti/Fe] Origin for [Ti/Fe] (apogee or galah)
344-349 F6.3 --- [V/Fe] [-1.06/1.87]? [V/Fe] abundance
351-356 F6.3 --- e_[V/Fe] [0.01/0.45]? Error on [V/Fe]
358-363 A6 --- r_[V/Fe] Origin for [V/Fe] (apogee or galah)
365-370 F6.3 --- [Cr/Fe] [-0.56/1.41]? [Cr/Fe] abundance
372-377 F6.3 --- e_[Cr/Fe] [0.02/0.24]? Error on [Cr/Fe]
379-383 A5 --- r_[Cr/Fe] Origin for [Cr/Fe] (apogee or galah)
385-390 F6.3 --- [Mn/Fe] [-1.31/1.73]? [Mn/Fe] abundance
392-397 F6.3 --- e_[Mn/Fe] [0/0.32]? Error on [Mn/Fe]
399-404 A6 --- r_[Mn/Fe] Origin for [Mn/Fe] (apogee or galah)
406-411 F6.3 --- [Co/Fe] [-1.85/2.82]? [Co/Fe] abundance
413-418 F6.3 --- e_[Co/Fe] [0.0/0.3]? Error on [Co/Fe]
420-425 A6 --- r_[Co/Fe] Origin for [Co/Fe] (apogee or galah)
427-432 F6.3 --- [Ni/Fe] [-0.91/1.48]? [Ni/Fe] abundance
434-439 F6.3 --- e_[Ni/Fe] [0.0/0.3]? Error on [Ni/Fe]
441-446 A6 --- r_[Ni/Fe] Origin for [Ni/Fe] (apogee or galah)
448-453 F6.3 --- [Cu/Fe] [-1.6/1.45]? [Cu/Fe] abundance
455-460 F6.3 --- e_[Cu/Fe] [0.01/0.3]? Error on [Cu/Fe]
462-467 A6 --- r_[Cu/Fe] Origin for [Cu/Fe] (apogee or galah)
469-474 F6.3 --- [Zn/Fe] [-1.07/1.47]? [Zn/Fe] abundance
476-481 F6.3 --- e_[Zn/Fe] [0.03/0.48]? Error on [Zn/Fe]
483-487 A5 --- r_[Zn/Fe] Origin for [Zn/Fe] (apogee or galah)
489-494 F6.3 --- [Y/Fe] [-1.24/1.78]? [Y/Fe] abundance
496-501 F6.3 --- e_[Y/Fe] [0.04/0.56]? Error on [Y/Fe]
503-507 A5 --- r_[Y/Fe] Origin for [Y/Fe] (apogee or galah)
509-514 F6.3 --- [Zr/Fe] [-0.44/2.3]? [Zr/Fe] abundance
516-521 F6.3 --- e_[Zr/Fe] [0/0.29]? Error on [Zr/Fe]
523-527 A5 --- r_[Zr/Fe] Origin for [Zr/Fe] (apogee or galah)
529-534 F6.3 --- [Ba/Fe] [-0.86/1.79]? [Ba/Fe] abundance
536-541 F6.3 --- e_[Ba/Fe] [0.03/0.3]? Error on [Ba/Fe]
543-547 A5 --- r_[Ba/Fe] Origin for [Ba/Fe] (apogee or galah)
549-554 F6.3 --- [La/Fe] [-0.33/2.46]? [La/Fe] abundance
556-561 F6.3 --- e_[La/Fe] [0/0.29]? Error on [La/Fe]
563-567 A5 --- r_[La/Fe] Origin for [La/Fe] (apogee or galah)
569-574 F6.3 --- [Nd/Fe] [-0.18/1.81]? [Nd/Fe] abundance
576-581 F6.3 --- e_[Nd/Fe] [0/0.29]? Error on [Nd/Fe]
583-587 A5 --- r_[Nd/Fe] Origin for [Nd/Fe] (apogee or galah)
589-594 F6.3 --- [Eu/Fe] [-0.34/1.72]? [Eu/Fe] abundance
596-601 F6.3 --- e_[Eu/Fe] [0/0.18]? Error on [Eu/Fe]
603-607 A5 --- r_[Eu/Fe] Origin for [Eu/Fe] (apogee or galah)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 A13 --- Cluster Cluster name
15- 18 F4.2 [yr] logAge [7.02/9.86] Age (log(Age/yr))
20- 23 I4 --- Nmemb [12/2920] Number of members
25- 34 F10.6 deg RAdeg [1.09/359.77] Right Ascension (J2000)
36- 45 F10.6 deg s_RAdeg [0.01/142.35] Standard deviation on
Right Ascension
47- 56 F10.6 deg DEdeg [-72.53/85.25] Declination (J2000)
58- 65 F8.6 deg s_DEdeg [0.01/5.18] Standard deviation on
Declination
67- 72 F6.3 mas plx [0.0/20.94] Parallax
74- 78 F5.3 mas s_plx [0.02/2.59] Standard deviation on Parallax
80- 87 F8.3 mas/yr pmRA [-36.15/101.62] Proper motion along RA
89- 94 F6.3 mas/yr s_pmRA [0.05/25.36] Standard deviation on pmra
96-102 F7.3 mas/yr pmDE [-45.53/12.71] Proper motion along DE
104-109 F6.3 mas/yr s_pmDE [0.05/15.77] Standard deviation on pmdec
111-115 F5.3 kpc dist [0.04/8.17] Distance
117-121 F5.3 kpc s_dist [0.0/2.17] Standard deviation on Distance
123-129 F7.4 kpc XXYZ [5.11/15.86] Galactic X in cartesian
coordinates XYZ
131-136 F6.4 kpc e_XXYZ [0.0/2.04] Error on Galactic X in
cartesian coordinates XYZ
138-144 F7.4 kpc YXYZ [-6.61/4.2] Galactic Y in cartesian
coordinates XYZ
146-151 F6.4 kpc e_YXYZ [0.0/1.84] Error on Galactic Y in
cartesian coordinates XYZ
153-159 F7.4 kpc ZXYZ [-1.37/1.18] Galactic Z in cartesian
coordinates XYZ
161-166 F6.4 kpc e_ZXYZ [0.0/0.57] Error on Galactic Z in
cartesian coordinates XYZ
168-175 F8.3 km/s ULSR [-171.33/373.57] Cartesian U velocity
in LSR
177-182 F6.3 km/s e_ULSR [0.01/51.68] Error on Cartesian U velocity
in LSR
184-191 F8.3 km/s VLSR [-915.69/246.78] Cartesian V velocity
in LSR
193-198 F6.3 km/s e_VLSR [0.11/39.09] Error on Cartesian V velocity
in LSR
200-206 F7.3 km/s WLSR [-42.28/35.35] Cartesian W velocity in LSR
208-213 F6.3 km/s e_WLSR [0.31/11.0] Error on Cartesian W velocity
in LSR
215-221 F7.4 kpc RRzphi [5.67/16.05] Galactic R in cylindrical
coordinates Rzphi
223-228 F6.4 kpc e_RRzphi [0.0/2.11] Error on Galactic R in
cylindrical coordinates Rzphi
230-236 F7.4 rad phiRzphi [-0.83/0.63] Galactic phi in
cylindrical coordinates Rzphi
238-243 F6.4 rad e_phiRzphi [0.0/0.2] Error on Galactic phi in
cylindrical coordinates Rzphi
245-251 F7.4 kpc zRzphi [-1.37/1.18] Galactic z in cylindrical
coordinates Rzphi
253-258 F6.4 kpc e_zRzphi [0.0/0.57] Error on Galactic z in
cylindrical coordinates Rzphi
260-267 F8.3 km/s vRRzphi [-585.17/60.85] Cylindrical vR velocity
269-274 F6.3 km/s e_vRRzphi [0.01/37.67] Error on Cylindrical vR
velocity
276-283 F8.3 mas/s vphiRzphi [-507.58/501.21] Cylindrical vphi velocity
285-290 F6.3 mas/s e_vphiRzphi [0.12/38.87] Error on Cylindrical vphi
velocity
292-298 F7.3 km/s vzRzphi [-34.79/42.42] Cylindrical vz velocity
300-305 F6.3 km/s e_vzRzphi [0.31/10.96] Error on Cylindrical vz
velocity
307-319 F13.4 kpc.km/s JR [0.15/18727601.28] Radial Action
321-328 F8.4 kpc.km/s e_JR [0.0/179.17] Error on Radial Action
330-338 F9.3 kpc.km/s LZ [-5010.76/4024.65] Angular Momentum
340-346 F7.3 kpc.km/s e_LZ [1.02/472.19] Error on Angular Momentum
348-353 F6.3 kpc.km/s JZ [0.01/32.54] Vertical Action
355-360 F6.3 kpc.km/s e_JZ [0.0/19.38] Error on Vertical Action
362-367 F6.4 --- ecc [0.0/0.3]?=0 Orbit Eccentricity
369-374 F6.4 --- e_ecc [0.0/0.13]?=0 Error on Orbit Eccentricity
376-381 F6.3 kpc zmax [0.01/2.46]? Maximun height above the plane
383-387 F5.3 kpc e_zmax [0.0/1.06]?=0 Error on z max
389-396 F8.4 kpc Rperi [4.7/13.05]? Orbit Periastron
398-403 F6.4 kpc e_Rperi [0.0/2.41]?=0 Error on Orbit Periastron
405-412 F8.4 kpc Rap [5.83/20.12]? Orbit Apoastron
414-419 F6.4 kpc e_Rap [0.0/5.58]?=0 Error on Orbit Apoastron
421-430 F10.2 km2/s2 Energy [-68376.75/239389.47] Orbit Energy
432-439 F8.2 km2/s2 e_Energy [28.32/11371.35] Error on Orbit Energy
441-446 F6.3 kpc Rguid [5.2/24.93] Guiding radius
448-452 F5.3 kpc e_Rguid [0.0/2.37] Error on Guiding radius
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 A13 --- Cluster Cluster name
15- 20 F6.3 --- [Fe/H] [-0.63/0.34] [Fe/H] abundance
22- 26 F5.3 --- e_[Fe/H] [0.0/0.17] Error on [Fe/H]
28- 30 I3 --- o_[Fe/H] [1/168]?=0 Number of cluster members for [Fe/H]
32- 37 F6.3 --- [O/Fe] [-0.31/0.46]? [O/Fe] abundance
39- 44 F6.3 --- e_[O/Fe] [0.0/0.33]? Error on [O/Fe]
46- 47 I2 --- o_[O/Fe] [0/98]?=0 Number of cluster members for [O/Fe]
49- 54 F6.3 --- [Na/Fe] [-0.24/0.57]? [Na/Fe] abundance
56- 61 F6.3 --- e_[Na/Fe] [0.0/0.29]? Error on [Na/Fe]
63- 65 I3 --- o_[Na/Fe] [0/106]?=0 Number of cluster members for [Na/Fe]
67- 72 F6.3 --- [Mg/Fe] [-0.17/0.12]? [Mg/Fe] abundance
74- 79 F6.3 --- e_[Mg/Fe] [0.0/0.15]? Error on [Mg/Fe]
81- 83 I3 --- o_[Mg/Fe] [0/128]?=0 Number of cluster members for [Mg/Fe]
85- 90 F6.3 --- [Al/Fe] [-0.13/0.33]? [Al/Fe] abundance
92- 97 F6.3 --- e_[Al/Fe] [0.0/0.16]? Error on [Al/Fe]
99-101 I3 --- o_[Al/Fe] [0/129]?=0 Number of cluster members for [Al/Fe]
103-108 F6.3 --- [Si/Fe] [-0.11/0.19]? [Si/Fe] abundance
110-115 F6.3 --- e_[Si/Fe] [0.0/0.15]? Error on [Si/Fe]
117-119 I3 --- o_[Si/Fe] [0/129]?=0 Number of cluster members for [Si/Fe]
121-126 F6.3 --- [Ca/Fe] [0.0/0.28]? [Ca/Fe] abundance
128-133 F6.3 --- e_[Ca/Fe] [0.0/0.17]? Error on [Ca/Fe]
135-137 I3 --- o_[Ca/Fe] [0/126]?=0 Number of cluster members for [Ca/Fe]
139-144 F6.3 --- [Ti/Fe] [-0.14/0.49]? [Ti/Fe] abundance
146-151 F6.3 --- e_[Ti/Fe] [0.0/0.2]? Error on [Ti/Fe]
153-155 I3 --- o_[Ti/Fe] [0/113]?=0 Number of cluster members for [Ti/Fe]
157-162 F6.3 --- [V/Fe] [-0.15/0.65]? [V/Fe] abundance
164-169 F6.3 --- e_[V/Fe] [0.0/0.26]? Error on [V/Fe]
171-172 I2 --- o_[V/Fe] [0/65]?=0 Number of cluster members for [V/Fe]
174-179 F6.3 --- [Cr/Fe] [-0.13/0.15]? [Cr/Fe] abundance
181-186 F6.3 --- e_[Cr/Fe] [0.0/0.13]? Error on [Cr/Fe]
188-189 I2 --- o_[Cr/Fe] [0/96]?=0 Number of cluster members for [Cr/Fe]
191-196 F6.3 --- [Mn/Fe] [-0.16/0.19]? [Mn/Fe] abundance
198-203 F6.3 --- e_[Mn/Fe] [0.0/0.14]? Error on [Mn/Fe]
205-207 I3 --- o_[Mn/Fe] [0/123]?=0 Number of cluster members for [Mn/Fe]
209-214 F6.3 --- [Co/Fe] [-0.46/0.57]? [Co/Fe] abundance
216-221 F6.3 --- e_[Co/Fe] [0.0/0.44]? Error on [Co/Fe]
223-225 I3 --- o_[Co/Fe] [0/103]?=0 Number of cluster members for [Co/Fe]
227-232 F6.3 --- [Ni/Fe] [-0.24/0.3]? [Ni/Fe] abundance
234-239 F6.3 --- e_[Ni/Fe] [0.0/0.17]? Error on [Ni/Fe]
241-243 I3 --- o_[Ni/Fe] [0/127]?=0 Number of cluster members for [Ni/Fe]
245-250 F6.3 --- [Cu/Fe] [-0.27/0.27]? [Cu/Fe] abundance
252-257 F6.3 --- e_[Cu/Fe] [0.0/0.25]? Error on [Cu/Fe]
259-261 I3 --- o_[Cu/Fe] [0/122]?=0 Number of cluster members for [Cu/Fe]
263-268 F6.3 --- [Zn/Fe] [-0.25/0.29]? [Zn/Fe] abundance
270-275 F6.3 --- e_[Zn/Fe] [0.0/0.26]? Error on [Zn/Fe]
277-278 I2 --- o_[Zn/Fe] [0/97]?=0 Number of cluster members for [Zn/Fe]
280-285 F6.3 --- [Y/Fe] [-0.13/0.57]? [Y/Fe] abundance
287-292 F6.3 --- e_[Y/Fe] [0.03/0.37]? Error on [Y/Fe]
294-295 I2 --- o_[Y/Fe] [0/93]?=0 Number of cluster members for [Y/Fe]
297-302 F6.3 --- [Zr/Fe] [-0.05/0.31]? [Zr/Fe] abundance
304-309 F6.3 --- e_[Zr/Fe] [0.04/0.55]? Error on [Zr/Fe]
311-312 I2 --- o_[Zr/Fe] [0/33]?=0 Number of cluster members for [Zr/Fe]
314-319 F6.3 --- [Ba/Fe] [-0.08/0.81]? [Ba/Fe] abundance
321-326 F6.3 --- e_[Ba/Fe] [0.0/0.18]? Error on [Ba/Fe]
328-329 I2 --- o_[Ba/Fe] [0/98]?=0 Number of cluster members for [Ba/Fe]
331-336 F6.3 --- [La/Fe] [-0.23/0.75]? [La/Fe] abundance
338-343 F6.3 --- e_[La/Fe] [0.01/0.28]? Error on [La/Fe]
345-346 I2 --- o_[La/Fe] [0/51]?=0 Number of cluster members for [La/Fe]
348-353 F6.3 --- [Nd/Fe] [-0.02/0.93]? [Nd/Fe] abundance
355-360 F6.3 --- e_[Nd/Fe] [0.02/0.53]? Error on [Nd/Fe]
362-363 I2 --- o_[Nd/Fe] [0/28]?=0 Number of cluster members for [Nd/Fe]
365-370 F6.3 --- [Eu/Fe] [-0.23/0.6]? [Eu/Fe] abundance
372-377 F6.3 --- e_[Eu/Fe] [0.01/0.2]? Error on [Eu/Fe]
379-380 I2 --- o_[Eu/Fe] [0/18]?=0 Number of cluster members for [Eu/Fe]
--------------------------------------------------------------------------------
Acknowledgements:
Lorenzo Spina, spina.astro(at)gmail.com
(End) Patricia Vannier [CDS] 01-Jun-2021