J/AN/329/609 Red giant candidates in 10 open clusters (Claria+, 2008)
Photometric membership and metallicities of red giant candidates in selected
open clusters.
Claria J.J., Piatti A.E., Mermilliod J.-C., Palma T.
<Astron. Nachrichten 329, 609-618 (2008)>
=2008AN....329..609C 2008AN....329..609C
ADC_Keywords: Clusters, open ; Stars, giant ; Radial velocities ; Photometry
Keywords: Cluster, open - star, red giant - technique, photometry -
technique, radial velocity
Abstract:
As part of a long-term project to determine abundances and
astrophysical properties of evolved red stars in open clusters, we
present high-precision DDO photoelectric observations for a sample of
33 red giant candidates projected in the fields of nine Galactic open
clusters. These data are supplemented with UBV photoelectric
photometry of 24 of these stars as well as with CORAVEL
radial-velocity observations for 13 red giant candidates in four of
the clusters. We also present Washington photoelectric photometry of a
small sample of red giant candidates of the open cluster Ruprecht 97.
The likelihood of cluster membership for each star photometrically
observed and for 23 additional red giant candidates with UBV and
DDO data available in the literature, is evaluated by using two
independent photometric criteria. Nearly 82% of the analysed stars are
found to have a high probability of being cluster giants. Photometric
membership probabilities show very good agreement with those obtained
from CORAVEL radial velocities. While E(B-V) colour excesses were
determined from combined B-V and DDO colours, calibrations of the DDO
system were used to derive MK spectral types, effective temperatures
and metallicities.The derived DDO metallicities range between values
typical of moderately metal-poor clusters ([Fe/H]=-0.19) to moderately
metal-rich ([Fe/H]=0.25) ones.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 49 10 Observed clusters
table3.dat 80 56 UBV photometry
table4.dat 71 56 DDO photometry
table6.dat 77 6 Washington photometry of red giant candidates
in Ruprecht 97
table7.dat 58 17 CORAVEL mean radial velocities
table8.dat 67 51 Photometric membership
table9.dat 76 47 Effective temperature and metal abundance
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- OCl Cluter name
13- 14 I2 h RAh Right ascension (J2000.0)
16- 19 F4.1 min RAm Right ascension (J2000.0)
21 A1 --- DE- Declination sign (J2000.0)
22- 23 I2 deg DEd Declination (J2000.0)
25- 26 I2 arcmin DEm Declination (J2000.0)
28- 32 F5.1 deg GLON Galactic longitude
34- 37 F4.1 deg GLAT Galactic latitude
39- 42 F4.2 mag E(B-V) B-V colour excess
44- 47 F4.2 [yr] logAge Cluster age
49 I1 --- N Number of late-type stars observed in the
cluster
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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- 11 A11 --- OCl Cluster designation
12- 15 I4 --- No Star number
16- 17 A2 --- D [* ] Double star (G1)
19- 20 I2 h RAh Right ascension (J2000)
22- 23 I2 min RAm Right ascension (J2000)
25- 30 F6.3 s RAs Right ascension (J2000)
31 A1 --- DE- Declination sign (J2000)
32- 33 I2 deg DEd Declination (J2000)
35- 36 I2 arcmin DEm Declination (J2000)
38- 42 F5.2 arcsec DEs Declination (J2000)
44- 49 F6.3 mag Vmag V magnitude
51- 52 I2 mmag e_Vmag ? Error on V magnitude
54- 59 F6.3 mag B-V (B-V) colour index
61- 62 I2 mmag e_B-V ? Error on B-V
64- 69 F6.3 mag U-B (U-B) colour index
71- 72 I2 mmag e_U-B ? Error on U-B
74 I1 --- N1 ? Number of UBV measurements
76- 80 A5 --- r1 Source of published UBV data (1)
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Note (1): UBV data sources as follows:
1 = McClure, R.D., 1972ApJ...172..615M 1972ApJ...172..615M
2 = Claria, J.J., Lapasset, E., Minniti, D., 1989A&AS...78..363C 1989A&AS...78..363C
3 = Claria, J.J. & Lapasset, E., 1983JApA....4..117C 1983JApA....4..117C
4 = Oja, T., 1976, private communication
5 = Claria, J.J., 1985A&AS...59..195C 1985A&AS...59..195C
6 = Loden, U., 1969ArA.....5..149L 1969ArA.....5..149L
7 = Mermillod, J.-C., Claria, J.J., et al. 2001,Cat. J/A+A/375/30
8 = Hiltner, W.A., Iriarte, B., Johnson, H.L., 1958ApJ...127..539H 1958ApJ...127..539H
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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- 11 A11 --- OCl Cluster designation
12- 15 I4 --- No Star number
16- 17 A2 --- D [* ] Double star (G1)
21- 25 F5.3 mag 45-48 C45-48 colour index
30- 31 I2 mmag e_45-48 ? Error on C45-48 colour index
35- 39 F5.3 mag 42-45 C42-45 colour index
45- 46 I2 mmag e_42-45 ? Error on C42-45 colour index
50- 54 F5.3 mag 41-42 C41-42 colour index
59- 60 I2 mmag e_41-42 ? Error on C41-42 colour index
66 I1 --- N2 ? Number of DDO measurements
71 I1 --- r2 ? Source of published DDO data (1)
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Note (1): DDO data sources as follows:
1 = McClure, R.D., 1972ApJ...172..615M 1972ApJ...172..615M
2 = Claria, J.J., Lapasset, E., Minniti, D.,1989A&AS...78..363C 1989A&AS...78..363C
3 = Smith, M.J., Nandy, K., 1962, Publ. Roy. Obs. Edinburgh, III, 23
4 = Claria, J.J.,1985A&AS...59..195C 1985A&AS...59..195C
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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- 11 A11 --- OCl Cluster designation
13- 16 I4 --- No Star number
18- 19 I2 h RAh Right ascension (J2000.0)
21- 22 I2 min RAm Right ascension (J2000.0)
24- 27 F4.1 s RAs Right ascension (J2000.0)
29 A1 --- DE- Declination sign (J2000.0)
30- 31 I2 deg DEd Declination (J2000.0)
33- 34 I2 arcmin DEm Declination (J2000.0)
36- 39 F4.1 arcsec DEs Declination (J2000.0)
41- 45 F5.3 mag C-M Washington C-M colour index (391/508nm)
47- 48 I2 mmag e_C-M rms uncertainty on C-M
50- 54 F5.3 mag M-T1 Washington M-T1 colour index (508/633nm)
56 I1 mmag e_M-T1 rms uncertainty on M-T1
58- 62 F5.3 mag T1-T2 Washington T1-T2 colour index (633/788nm)
64- 65 I2 mmag e_T1-T2 rms uncertainty on T1-T2
67- 72 F6.3 mag T1mag Washington T1 magnitude (633±80nm)
74- 75 I2 mmag e_T1mag rms uncertainty on T1mag
77 I1 --- N3 Number of night observed
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- OCl Cluster designation
12- 15 I4 --- No Star number
17- 22 F6.2 km/s RV Mean radial velocity
24- 27 F4.2 km/s e_RV Error on the radial velocity
29- 33 F5.2 km/s sigma Dispersion in the mean radial velocity
35- 39 F5.2 --- E/I External to internal error ratio
41- 42 I2 --- o_RV Number of RV measurements
44- 47 I4 d Time Time interval covered by the observations
of each star
49- 53 F5.3 --- P(chi2) Probability of variability
55- 58 A4 --- Notes Remarks on duplicity or membership (G1)
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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- 11 A11 --- OCl Cluster designation
12- 15 I4 --- No Star number
16- 17 A2 --- D [* ] Duplicity (G1)
19- 22 F4.2 mag E(B-V) ?=- B-V colour excess from DDO
24- 27 F4.2 mag e_E(B-V) ?=- Uncertainty on the B-V colour excess
29- 34 A6 --- LC Predicted luminosity class
36- 45 A10 --- SpType Photometric type from DDO
47- 48 A2 --- MemA Membership from criterion A
50- 51 A2 --- MemB Membership from criterion B
53- 54 A2 --- Memb Adopted membership
56- 61 F6.2 km/s RV ?=- Mean radial velocity
63- 67 A5 --- Notes Remarks on duplicity or membership (G1)
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Byte-by-byte Description of file: table9.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- OCl Cluster designation
12- 15 I4 --- No Star number
20- 24 F5.3 mag n45-48 Normal DDO C45-48 colour
28- 32 F5.3 mag n42-45 Normal DDO C42-45 colour
36- 40 F5.3 mag n41-42 Normal DDO C41-42 colour
44- 49 F6.3 mag deltaCN Cyanogen anomaly
53- 57 F5.2 [Sun] Fe/H metal abundance
62 I1 --- Ni Number of iterations
67- 70 I4 K Teff ?=- Effective temperature
75- 76 A2 --- Mem Membership (G1)
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Global notes:
Note (G1): Flags and notes as follows:
* = Double star, both components measured together
** = Suspected variable Lapasset, E., Claria, J.J., Minniti, D.,
1991IBVS.3594....1L 1991IBVS.3594....1L
m = member
nm = non-member
pm = probable member
SB = Spectrosocpic binary
SB10 = Binary with an orbit in Mermilliod et al. (2007, Cat. J/A+A/473/829)
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Acknowledgements:
Jean-Claude Mermilliod, Jean-Claude.Mermilliod(at)obs.unige.ch
(End) Jean-Claude Mermilliod, Patricia Vannier [CDS] 12-Dec-2008