J/A+A/562/A54 Galactic open clusters in RAVE (Conrad+, 2014)
A RAVE investigation on Galactic open clusters.
I. Radial velocities and metallicities.
Conrad C., Scholz R.-D., Kharchenko N.V., Piskunov A.E., Schilbach E.,
Roser S., Boeche C., Kordopatis G., Siebert A., Williams M., Munari U.,
Matijevic G., Grebel E.K., Zwitter T., de Jong R.S., Steinmetz M.,
Gilmore G., Seabroke G., Freeman K., Navarro J.F., Parker Q., Reid W.,
Watson F., Gibson B.K., Bienayme O., Wyse R., Bland-Hawthorn J., Siviero A.
<Astron. Astrophys. 562, A54 (2014)>
=2014A&A...562A..54C 2014A&A...562A..54C
ADC_Keywords: Clusters, open ; Radial velocities ; Abundances
Keywords: open clusters and associations: general - solar neighborhood -
Galaxy: kinematics and dynamics - stars: kinematics and dynamics -
stars: abundances
Abstract:
Galactic open clusters (OCs) mainly belong to the young stellar
population in the Milky Way disk, but are there groups and complexes
of OCs that possibly define an additional level in hierarchical star
formation? Current compilations are too incomplete to address this
question, especially regarding radial velocities (RVs) and
metallicities ([M/H]).
Here we provide and discuss newly obtained RV and [M/H] data, which
will enable us to reinvestigate potential groupings of open clusters
and associations.
Description:
The presented tables summarise new radial velocities and average
metallicities for Galactic open clusters extracted from the Catalogue
of Open Cluster Data (COCD; Kharchenko et al. 2005, Cat.
J/A+A/438/1163, J/A+A/440/403). The data were obtained from the RAdial
Velocity Experiment (RAVE; Kordopatis et al. 2013AJ....146..134K 2013AJ....146..134K)
through a cross match with the stellar catalogues related to the COCD.
The RV and [M/H] values were computed as weighted means, considering
the individual uncertainties of the included members and their cluster
membership probability based on position, proper motion, and
photometry.
The three uncertainties listed originate from different calculations:
"RV_RAVE" and "Met_RAVE" are the weighted mean values for RV and [M/H]
"err_RV" and "err_Met" are equivalent to the uncertainty of the mean
values "sig_RV" and "sig_Met" are the standard deviations of the mean
values "e_RV" and "e_Met" weighted mean values of the individual
uncertainties of the included open cluster (OC) members
For the calculations we primarily considered most probable OC members
(best members) with a membership probability of at least 61%. Only in
cases where just one or no most probable members was available we also
included possible members (good members) with membership probabilities
above 14%. In the table we include the numbers for both types of
members separately: best members -> "bmem" and good members -> "gmem".
We included reference values for RVs from the second version of the
Catalogue of Radial Velocities with Astrometric Data (CRVAD-2) and the
Catalogue of Radial Velocities of Open Clusters and Associations
(CRVOCA) provided by Kharchenko et al. 2007, Cat. III/254). The
CRVAD-2 reference values were computed according to the RAVE values
for identified OC members. The CRVOCA references were directly
extracted from the catalogue and number of OC members used are given
in column "nmem".
The reference values for [M/H] were obtained from the online
compilation provided by Dias et al. (2002, See B/ocl), hereafter
referred to as DAML. These were obtained through different techniques
and the literature references from DAML are also included in our
table. In DAML actual [M/H] values are mixed with [Fe/H] values and we
only considered the actual [M/H], based on information given in the
references.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
ocrv.dat 119 110 Radial velocities for Galactic open clusters
ocmet.dat 105 81 Average metallicities for Galactic open clusters
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See also:
B/ocl : Optically visible open clusters and Candidates (Dias+ 2002-13)
III/239 : CRVAD: Radial Velocities with Astrometric Data (Kharchenko+ 2004)
III/254 : CRVAD2: 2nd Cat. of RV with Astrometric Data (Kharchenko+, 2007)
III/272 : RAVE 4rd data release (Siebert+, 2013)
J/A+A/438/1163 : Catalogue of Open Cluster Data (COCD) (Kharchenko+, 2005)
J/A+A/440/403 : 109 new Galactic open clusters (Kharchenko+, 2005)
Byte-by-byte Description of file: ocrv.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- Seq [1/1097] COCD Sequential number (G1)
7- 21 A15 --- Name Name of the Cluster
23- 29 F7.3 km/s RVR Radial velocity from RAVE (III/272)
31- 36 F6.3 km/s e_RVR Uncertainty for RVR
38- 44 F7.3 km/s s_RVR ?=999.999 standard deviation of RVR
46- 51 F6.3 km/s <e_RVR> Mean of individual RV uncertainties of OC members
53- 55 I3 --- NbR ?=999 Number of best OC members used for RVR
57- 59 I3 --- NgR ?=999 Number of good OC members used for RVR
61- 67 F7.3 km/s RV1 ?=999.999 Radial velocity from CRVAD (RV_CRVAD)
69- 75 F7.3 km/s e_RV1 ?=999.999 Uncertainty of RV_CRVAD
77- 83 F7.3 km/s s_RV1 ?=999.999 Standard deviation of RV_CRVAD
85- 91 F7.3 km/s <e_RV1> ?=999.999 Mean of individual RV uncertainties
of OC members
93- 95 I3 --- Nb1 ?=999 Number of best OC members used for RV_CRVAD
97- 99 I3 --- Ng1 ?=999 Number of good OC members used for RV_CRVAD
101-107 F7.3 km/s RV2 ?=999.999 Radial velocity the CRVOCA (RV_CRVOCA)
109-115 F7.3 km/s e_RV2 ?=999.999 Uncertainty for RV_CRVOCA
117-119 I3 --- Nm2 ?=999 Number of OC members used for RV_CRVOCA (1)
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Note (1): -1 values indicates RV taken from only one representative star with
a membership probability based only on proper motions and position of >1%.
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Byte-by-byte Description of file: ocmet.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- Seq [1/1097] COCD Sequential number (G1)
7- 21 A15 --- Name Name of the Cluster
23- 28 F6.3 [Sun] MetR ? [M/H] value from RAVE (Met_RAVE)
30- 34 F5.3 [Sun] e_MetR Uncertainty for MetR
36- 41 F6.3 [Sun] s_MetR ?=99.999 standard deviation of MetR
43- 47 F5.3 [Sun] <e_MetR> Mean of individual [M/H] uncertainties of
cluster members
49- 51 I3 --- NbR ?=999 Number of best OC members used
for Met_RAVE
53- 55 I3 --- NgR ?=999 Number of good OC members used
for Met_RAVE
57- 62 F6.3 [Sun] Metc ?=99.999 [M/H] from RAVE chemical pipeline
(Met_chem)
64- 69 F6.3 [Sun] e_Metc ?=99.999 Uncertainty of Met_chem
71- 73 I3 --- Nbc ?=999 Number of best OC members used
for Met_chem
75- 77 I3 --- Ngc ?=999 Number of good OC members used
for Met_chem
79- 84 F6.3 [Sun] MetD ?=99.999 [M/H] from DAML (B/ocl) (Met_DAML)
86- 91 F6.3 [Sun] e_MetD ?=99.999 uncertainty for MetD
93- 95 I3 --- NmD ?=999 Number of OC members used for MetD
97-100 A4 --- Tech Method applied to get [M/H] listed in DAML (1)
102-105 A4 --- Ref Literature reference for MetD (2)
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Note (1): Method applied to get [M/H] listed in DAML as follows:
DDO = DDO photometry
DTR = recalibrated values from Piatti et al. (1995AJ....110.2813P 1995AJ....110.2813P)
REC = recalibrated values from Gratton (2000, ASPCS, Vol. 198, 225)
STO = Stromgren uvby photometry
UBV = UBV photometry
SPE = high, moderate, or low-resolution spectroscopy
Note (2): References as follows:
Cl99 = Claria et al. (1999, Cat. J/A+AS/134/301)
G00 = Gratton (2000, ASPCS, Vol. 198, 225)
Ma00 = Margheim et al. (2000, BAAS, Vol.32, 196.742)
N88 = Nissen (1988A&A...199..146N 1988A&A...199..146N)
Pi95 = Piatti et al. (1995AJ....110.2813P 1995AJ....110.2813P)
Po10 = Pohnl & Paunzen (2010A&A...514A..81P 2010A&A...514A..81P)
T97 = Twarog et al. (1997AJ....114.2556T 1997AJ....114.2556T)
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Global notes:
Note (G1): Sequential number of the Cluster in CODC (Catalogue of Open
Cluster Data) bu Kharchenko et al.:
* 2005, Cat. J/A+A/438/1163, <[KPR2004b] NNN> in Simbad (NNN≤520)
* 2009, Cat. J/A+A/440/403, <[KPR2005] NNNN> in Simbad (NNNN>1000)
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Acknowledgements:
Claudia Conrad, cconrad(at)aip.de
(End) Patricia Vannier [CDS] 28-Jan-2014