J/A+AS/107/39 IC 2714 UBV photometry (Claria+ 1994)
Photometric and Coravel observations of stars in the open cluster IC 2714
Claria J.J., Mermilliod J.-C., Piatti A.E., Minnit D.
<Astron. Astrophys. Suppl. Ser. 107, 39 (1994)>
=1994A&AS..107...39C 1994A&AS..107...39C (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, open ; Stars, giant ; Photometry, UBV ;
Photometry, DDO ; Photometry, CMT1T2V
Keywords: open clusters: IC 2714 - stars: giant, abundances, HR diagram
Abstract:
UBV photoelectric photometry for 204 stars in the field of the
southern open cluster IC 2714 supplemented by DDO and Washington
photometry and Coravel radial velocities of 14 probable red giants,
are presented. The analysis of the photometric and kinematical data
yielded 132 probable members and 13 possible members. IC 2714 contains
one variable star and 11 red giant members, one of them being a
spectroscopic binary. Two red giants are either binaries or
non-members. The reddening across the cluster is slightly variable,
the mean value is E(B-V)=0.36. The cluster distance-modulus is 11.68,
corresponding to a distance of 1320(±120)pc and the mean radial
velocity is -14.1±0.3km/s. The age, determined by fitting isochrones
with core overshooting turned out to be log(t)=8.5, corresponding to
3.2 10^8 yr. A metal abundance [Fe/H]=-0.12±0.09 relative to the Sun
and other fundamental parameters are determined. The luminosity
function of the bright members of IC 2714 in good agreement with that
determined by Taff (1974AJ.....79.1280T 1974AJ.....79.1280T).
For a description of the UBV, DDO and Washington photometric system,
see e.g. GCPD/01, GCPD/12 and GCPD/45
Objects:
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RA (2000) DE Designation(s)
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11 17.9 -62 42 IC 2714
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1 30 204 UBV photoelectric photometry of stars in IC 2714
table2 15 23 Colour excesses for members earlier than type A2
table3 32 14 DDO photometry of red giants in the cluster field
table4 42 13 Washington photometry of red giants in the
cluster field
table5 26 59 Coravel observations
table6 42 14 Red giant membership results
table7 48 10 Abundance parameters
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Byte-by-byte Description of file: table1
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Bytes Format Units Label Explanations
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1- 3 I3 --- Star Star number
4- 5 A2 --- n_Star [abc ] Note on star number (1)
7- 12 F6.3 mag Vmag V magnitude
14- 18 F5.3 mag B-V B-V colour index
20- 25 F6.3 mag U-B U-B colour index
27 I1 --- o_Vmag Number of nights of observation
29- 30 A2 --- Mem [mnp ] Membership status (2)
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Note (1): a: Red giant candidate; membership is based on radial velocities
and/or combined BV-DDO data (see table 6)
b: Variable star; individual measurements are given by
Piatti & Claria (1994IBVS.4010....1P 1994IBVS.4010....1P)
c: Visual binary detected at the telescope, photometry refers to the
combined light of both components
Note (2): m: member
nm: no member
pm: probable member
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Byte-by-byte Description of file: table2
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Bytes Format Units Label Explanations
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1- 3 I3 --- Star Star number
5- 9 F5.3 mag E(B-V) B-V colour excess
11- 15 F5.3 mag E(U-B) U-B colour excess
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Byte-by-byte Description of file: table3
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Bytes Format Units Label Explanations
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1- 3 I3 --- Star Star number
5- 9 F5.3 mag C(45-48) C(45-48) colour
11- 12 I2 mmag e_C(45-48) rms uncertainty on C(45-48)
14- 18 F5.3 mag C(42-45) C(42-45) colour
20- 21 I2 mmag e_C(42-45) rms uncertainty on C(42-45)
23- 27 F5.3 mag C(41-42) C(41-42) colour
29- 30 I2 mmag e_C(41-42) rms uncertainty on C(41-42)
32 I1 --- o_C(45-48) Number of nights of observation
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Byte-by-byte Description of file: table4
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Bytes Format Units Label Explanations
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1- 3 I3 --- Star Star number
5- 9 F5.3 mag C-M C-M colour index
11- 12 I2 mmag e_C-M rms uncertainty on C-M
14- 18 F5.3 mag M-T1 M-T1 colour index
20- 21 I2 mmag e_M-T1 rms uncertainty on M-T1
23- 27 F5.3 mag T1-T2 T1-T2 colour index
29- 30 I2 mmag e_T1-T2 rms uncertainty on T1-T2
32- 37 F6.3 mag T1 T1 magnitude
39- 40 I2 mmag e_T1 rms uncertainty on T1
42 I1 --- o_T1 Number of nights of observation
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Byte-by-byte Description of file: table5
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Bytes Format Units Label Explanations
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1- 3 I3 --- Star Star number
5- 15 F11.3 d HJD Heliocentric Julian date
17- 21 F5.1 km/s RV Radial velocity
23- 25 F3.1 km/s e_RV rms uncertainty on RV
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Byte-by-byte Description of file: table6
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Bytes Format Units Label Explanations
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1- 3 I3 --- Star Star name
5- 8 F4.2 mag E(B-V) ? B-V colour excess
10- 13 F4.2 mag e_E(B-V) ? rms uncertainty on E(B-V)
15- 20 A6 --- LClass Luminosity class the star would have in order
to be a cluster member
22- 30 A9 --- SpType Spectral type derived from the DDO colours
32- 33 A2 --- MemA Membership status from the photometric
criterium A (1)
35- 36 A2 --- MemB Membership status from the photometric
criterium B (1)
38- 39 A2 --- MemRV Membership status from kinematic data
41- 42 A2 --- Mem Final Membership status
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Note (1): Photometric criterium described by
Claria & Lapasset, 1983JApA....4..117C 1983JApA....4..117C
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Byte-by-byte Description of file: table7
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Bytes Format Units Label Explanations
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1- 3 I3 --- Star Star number
5- 10 F6.3 mag DCN New cyanogen anomaly (1)
11 A1 --- n_DCN [)] Note on DCN (2)
13- 18 F6.3 mag D'1 Washington abundance indicator 1 (3)
20- 25 F6.3 mag D'2 Washington abundance indicator 2 (3)
27- 32 F6.3 mag D'3 Washington abundance indicator 3 (3)
34- 39 F6.3 mag D'4 Washington abundance indicator 4 (3)
41- 46 F6.3 mag D'5 Washington abundance indicator 5 (3)
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Note (1): Difference between the intrinsic C0(41-42) colour and the standard
value of this index corresponding to a star with the same temperature
and surface gravity, but not with the same C0(42-45) and
C0(45-48) as the star in question.
Note (2): ): value extrapolated from Janes 1979ApJS...39..135J 1979ApJS...39..135J
Note (3): Washington abundance indicators from the method described by
Geisler et al., 1991AJ....102.1836G 1991AJ....102.1836G :
D'1 : (C-M) / (T1-T2)
D'2 : (M-T1) / (T1-T2)
D'3 : (C-T1) / (T1-T2)
D'4 : (C-M) / (M-T2)
D'5 : (C-T1) / (M-T2)
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Table5a: Coravel observations, mean values
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Star weighted mean Note
number velocity
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5 -14.95 ± 0.20
12 -11.24 ± 0.37
28 -12.94 ± 1.74 SB
34 -18.31 ± 0.35
53 -13.80 ± 0.42
87 -13.64 ± 0.29
105 +0.74 ± 0.27 NM
110 -14.30 ± 0.03
121 -13.35 ± 0.44
126 -14.83 ± 0.48
190 -14.02 ± 0.19
199 -32.68 ± 1.20 NM
206 +2.48 ± 0.27 NM
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Table 8. Summary of the results obtained for IC 2714
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POSITION
alpha = 11h15.7m delta = 62deg26' (1950.0)
l = 292deg26' b = 1deg46' (1950.0)
DISTANCE
V-Mv : apparent distance modulus = 11.68
E(B-V) : selective absorption = 0.36 ± 0.04
Av : visual absorption (variable) = 1.08
V0-Mv : true distance modulus = 10.60 ± 0.20
d : distance from the Sun = 1320 ± 120 pc
z : distance from the galactic plane = -41 pc
AGE
log t : log age = 8.5
t : age = 3.2x108 years
DIMENSION
D : angular diameter = 16'
δ : linear diameter = 6.2 pc
MEMBERSHIP
N(m) : number of probable members ≥ 132
N(pm) : number of possible members = 13
N(RG) : number of red giant members = 9 + 2?
N(V) : number of variables = 1
CHEMICAL COMPOSITION
[Fe/H] : metallicity = -0.12 ± 0.09
STRUCTURE OF MAIN SEQUENCE
(B-V)0 : blue turnoff = -0.06
: red turnoff = +0.09
(U-B)0 : blue turnoff = -0.11
: red turnoff = +0.07
Mv : clump mean magnitude = -0.1
LUMINOSITY FUNCTION
Maximum at Mv ∼ 1.5
INTEGRATED PARAMETERS
Mv : visual absolute mag. = -4.57
(B-V)0 : intrinsic (B-V) colour = +0.25
(U-B)0 : intrinsic (U-B) colour = +0.13
V0 : visual magnitude = 6.03
M/M☉ : total mass > 315
π : stellar density = 1.1 star/pc3
ρ : mean space density = 2.6 M☉/pc3
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History: Prepared via OCR at CDS.
(End) James Marcout, Patricia Bauer [CDS] 28-Nov-1996