J/A+A/658/A14 OCCASO IV. open cluster stars radial velocities (Carrera+, 2022)
OCCASO IV. Radial velocities and open cluster kinematics.
Carrera R., Casamiquela L., Carbajo-Hijarrubia J., Balaguer-Nunez L.,
Jordi C., Romero-Gomez M., Blanco-Cuaresma S., Cantat-Gaudin T.,
Lillo-Box J., Masana E., Pancino E.
<Astron. Astrophys. 658, A14 (2022)>
=2022A&A...658A..14C 2022A&A...658A..14C (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, open ; Radial velocities ; Optical
Keywords: stars: abundances - stars: evolution -
open clusters and association: general
Abstract:
Open clusters (OCs) are widely used as test particles to investigate a
variety of astrophysical phenomena, from stellar evolution to Galactic
evolution. Gaia and the complementary massive spectroscopic surveys
are providing an unprecedented wealth of information about these
systems.
The Open Cluster Chemical Abundances from Spanish Observatories
(OCCASO) survey aims to complement all this work by determining OCs'
accurate radial velocities and chemical abundances from
high-resolution, R≥60000, spectra. Methods. Radial velocities were
obtained by cross-correlating the observed spectra with a library of
synthetic spectra that covers early M to A spectral types.
We provide radial velocities for 336 stars including several Gaia
benchmark stars and objects belonging to 51 open clusters. The
internal uncertainties of the derived radial velocities go from
10m/s to 21m/s as a function of the instrumental configuration
used. The derived radial velocities, together with the Gaia proper
motions, were used to investigate the cluster membership of the
observed stars. After this careful membership analysis, we obtained
average velocities for 47 open clusters. To our knowledge, this is the
first radial velocity determination for five of these clusters.
Finally, the radial velocities, proper motions, distances and ages
were used to investigate the kinematics of the observed clusters and
in the integration of their orbits.
Description:
Radial velocities obtained for each star with each instrumental
configuration used including deriving velocity scatter, error, S/N and
number of exposures used. Ther average values obtained from MERC, NOT1
and NOT2 instrumental configurations are also used.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablee1.dat 289 336 Complete list of observed stars
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See also:
J/MNRAS/458/3150 : OCCASO survey. HRV for 12 open clusters (Casamiquela+, 2016)
J/A+A/610/A66 : Equivalent widths of 7 stars in NGC 6705 (Casamiquela+ 2018)
J/MNRAS/490/1821 : Abundances for stars in 18 open clusters (Casamiquela+ 2019)
Byte-by-byte Description of file: tablee1.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- OCCASO OCCASO ID
17- 35 I19 --- GaiaDR2 ? Gaia DR2 source_id
37- 55 I19 --- GaiaEDR3 ? Gaia EDR3 source_id
57- 72 A16 --- Cluster Cluster or Gaia benchmark star (GBS)
74- 93 F20.16 deg RAdeg Gaia EDR3 right ascension (ICRS) at EP=2016.0
95-114 F20.16 deg DEdeg Gaia EDR3 declination (ICRS) at EP=2016.0
115 A1 --- n_pos [*] * for positions of 3 bright stars
from Simbad
116-121 F6.3 mag Gmag ?=- Gaia EDR3 G band magnitude
123 I1 --- Flag OCCASO flags (1)
125-132 F8.3 km/s RVMerc ?=- Radial velocity Mercator
134-138 F5.3 km/s s_RVMerc ?=- Velocity scatter Mercator
140-144 F5.3 km/s e_RVMerc ?=- Velocity error Mercator
146-150 F5.1 pix-1 S/NMerc ?=- S/N Mercator
152 I1 --- NMerc ?=- Number of exposures Mercator
154-161 F8.3 km/s RVNOT1 ?=- Radial velocity NOT1
163-167 F5.3 km/s s_RVNOT1 ?=- Velocity scatter NOT1
169-173 F5.3 km/s e_RVNOT1 ?=- Velocity error NOT1
175-179 F5.1 pix-1 S/NNOT1 ?=- S/N NOT1
181-182 I2 --- NNOT1 ?=- Number of exposures NOT1
184-190 F7.3 km/s RVNOT2 ?=- Radial velocity NOT2
192-196 F5.3 km/s s_RVNOT2 ?=- Velocity scatter NOT2
198-202 F5.3 km/s e_RVNOT2 ?=- Velocity error NOT2
204-208 F5.1 pix-1 S/NNOT2 ?=- S/N NOT2
210 I1 --- NNOT2 ?=- Number exposures NOT2
212-219 F8.3 km/s RV ?=- Average radial velocity
221-226 F6.3 km/s s_RV ?=- Velocity scatter
228-232 F5.3 km/s e_RV ?=- Velocity error
234-238 F5.1 pix-1 S/N ?=- S/N total
240-241 I2 --- N Total number of exposures
243-249 F7.3 km/s RVCAH2 ?=- Radial velocity CAH2
251-255 F5.3 km/s s_RVCAH2 ?=- Velocity scatter CAH2
257-261 F5.3 km/s e_RVCAH2 ?=- Velocity error CAH2
263-267 F5.1 pix-1 S/NCAH2 ?=- S/N CAH2
269 I1 --- NCAH2 Number of exposures CAH2
271-289 A19 --- Tel Telescopes used (2)
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Note (1): OCCASO flags as follows:
0 = Star considered as cluster member
1 = Star considered as a spectroscopic binary from literature or from our data
9 = Star considered as non cluster member
Note (2): Telescopes as follows:
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Code Telescope Instrument Spectral Wavelength Notes
resolution coverage [nm]
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MERC NOT FIES 67000 400-725
NOT1 NOT FIES 67000 400-900 observations performed
before 2017
NOT2 Mercator HERMES 85000 400-900 observations performed
from 2017
CAH2 CAHA 2.2m CAFE2 62000 400-900 upgrade of the instrument
performed in 2018
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Acknowledgements:
Jiminez Carrara, jimenez.carrera(at)inaf.it
References:
Casamiquela et al., Paper I 2016MNRAS.458.3150C 2016MNRAS.458.3150C, Cat. J/MNRAS/458/3150
Casamiquela et al., Paper II 2018A&A...610A..66C 2018A&A...610A..66C, Cat. J/A+A/610/A66
Casamiquela et al., Paper III 2019MNRAS.490.1821C 2019MNRAS.490.1821C, Cat. J/MNRAS/490/1821
(End) Patricia Vannier [CDS] 16-Dec-2021