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J/A+A/386/187 Radial velocities in IC 4651 (Meibom+, 2002)
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Critical tests of stellar evolution in open clusters.
III: stellar population and dynamical evolution of IC 4651.
Meibom S., Andersen J., Nordstroem B.
<Astron. Astrophys. 386, 187 (2002)>
=2002A&A...386..187M (SIMBAD/NED BibCode)
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ADC_Keywords: Clusters, open ; Radial velocities ; Binaries, orbits ;
Rotational velocities
Keywords: open clusters and associations: IC 4651 - stars: HR diagram -
stars: evolution - stars: kinematics - stars: fundamental parameters
Description:
The radial-velocity observations were made during the years 1989-1997
with the photoelectric scanner CORAVEL (Mayor, 1985IAUCo..88...35M) on
the Danish 1.54-m telescope at ESO, La Silla. The individual mean
errors given are computed from the measured S/N ratio and the shape of
the cross-correlation profile (see Sect. 2.2 of this paper).
Objects:
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RA (2000) DE Designation(s)
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17 24.7 -49 57 IC 4651
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 99 104 Mean radial, rotational velocities for 104 stars
table2.dat 159 5 Revised orbital elements for red giant binaries
tablea1.dat 45 517 IC 4651: individual radial velocity observations
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See also:
J/A+A/361/929 : IC 4651 uvby photometry (Meibom, 2000)
J/A+AS/118/407 : CCD phot. + velocities of NGC 3680 stars (Nordstroem+ 1996)
J/A+A/322/460 : NGC 3680 photometry and radial velocities (Nordstroem+ 1997)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 5 I5 ---- MEI Meibom identification number (G1)
8- 12 A5 ---- Name Other name (1)
15- 19 F5.2 mag Vmag V magnitude
22- 26 F5.3 mag (b-y) ? (b-y) colour
29- 34 F6.2 km/s <RV> Mean radial velocity
37- 41 F5.2 km/s e_<RV> Error on mean radial velocity
44- 45 I2 ---- o_<RV> Number of observations
48- 52 F5.2 km/s e_<RV>1 Standard deviation of a single observation
55- 59 F5.2 --- O/C e_<RV>1/e_<RV>C ratio (2)
62- 65 I4 d deltaT Time span covered by observations
68- 72 F5.3 --- P(chi2) ? Probability that the velocity is constant,
i.e. that the star is single
75- 79 F5.3 --- P(RV) Cluster membership probability
81 A1 --- l_vsin(i) Limit flag on vsin(i)
82- 85 F4.1 km/s vsin(i) Mean rotational velocity
86 A1 --- u_vsin(i) Uncertainty flag on vsin(i)
88- 91 F4.1 km/s e_vsin(i) ? Error on rotational velocity
94- 99 A6 --- Remarks Comments (3)
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Note (1): Other names:
E: Eggen, 1971ApJ...166...87E, Cl* IC 4651 Egg NN
A: Anthony-Twarog et al. (1988AJ.....95.1453A)
L: Lindoff, 1972A&A....16..315L, IC 4651 NNN
M: Mermilliod et al. (1995, Cat. <J/A+A/299/53>), IC 4651 NNNN
Note (2): e_<RV>1/e_<RV>C, where 'e_<RV>C' is the average value of the error
estimated for each observation of a star based on the number of
counts and the shape of the profile.
Note (3): Comments:
M: Mermilliod et al. (1995, Cat. <J/A+A/299/53>)
O: new orbit in table2.dat
sb2/3: double/triple-lined spectroscopic binary
pm: probable member
*: remark in Sect. 2.3 of the paper
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- MEI Meibom identification number (G1)
7- 9 I3 ---- Lin Lindoff (1972A&A....16..315L) number,
IC 4651 NNN in Simbad
11- 18 F8.3 d Per Orbital period
20- 25 F6.3 d e_Per rms uncertainty on Per
27- 36 F10.2 d Time HJD time of periastron passage
38- 42 F5.2 d e_Time rms uncertainty on Time
44- 48 F5.3 --- Ecc Eccentricity of the orbit
50- 54 F5.3 --- e_Ecc rms uncertainty on Ecc
56- 60 F5.1 deg Omega Longitude of periastron
62- 65 F4.1 deg e_Omega ? rms uncertainty on Omega
67- 72 F6.2 km/s Gamma Barycenter velocity
74- 77 F4.2 km/s e_Gamma rms uncertainty on Gamma
79- 83 F5.2 km/s K1 Velocity semi-amplitude of primary
85- 88 F4.2 km/s e_K1 rms uncertainty on K1
90- 93 F4.1 km/s K2 ? Velocity semi-amplitude of secondary
95- 97 F3.1 km/s e_K2 ? rms uncertainty on K2
99-104 F6.2 Gm a1*sini Semi-major axis of primary, in 10^6^km
106-110 F5.2 Gm e_a1*sini rms uncertainty on a1*sini
112-114 I3 Gm a2*sini ? Semi-major axis of secondary, in 10^6^km
116-117 I2 Gm e_a2*sini ? rms uncertainty on a2*sini
119-124 F6.4 solMass f(m) ? Mass function (1)
126-131 F6.4 solMass e_f(m) ? rms uncertainty on f(m)
133-136 F4.2 solMass m1*sin(i)+3 ? Mass of the primary, m1*[sin(i)]^3^
138-141 F4.2 solMass e_m1*sin(i)+3 ? rms uncertainty on m1*sin(i)+3
143-146 F4.2 solMass m2*sin(i)+3 ? Mass of the secondary, m2*[sin(i)]^3^
148-151 F4.2 solMass e_m2*sin(i)+3 ? rms uncertainty on m2*sin(i)+3
153-156 F4.2 km/s Sigma rms uncertainty on velocities
158-161 I4 --- Nobs Number of observations
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Note (1): f(m)=[m2*sin(i)]^3^/(m1+m2)^2^
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 5 I5 ---- MEI ID (Meibom 2000) (G1)
7- 17 F11.3 d HJD Heliocentric Julian Date
20- 25 F6.2 km/s RV1 Radial velocity of primary star
28- 31 F4.2 km/s e_RV1 Computed mean error of RV1
34- 39 F6.2 km/s RV2 ? Radial velocity of secondary star
(in double-lined binaries only)
42- 45 F4.2 km/s e_RV2 ? Computed mean error of RV2
(in double-lined binaries only)
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Global notes:
Note (G1): Meibom, 2000, Cat. <J/A+A/361/929>, Cl* IC 4651 MEI NNNNN in Simbad
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Acknowledgements: Soren Meibom <meibom@astro.wisc.edu>
References:
Nordstroem et al., Paper I 1996A&AS..118..407N, Cat. <J/A+AS/118/407>
Nordstroem et al., Paper II 1997A&A...322..460N, Cat. <J/A+A/322/460>
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(End) Soeren Meibom [Wisconsin University], Patricia Bauer [CDS] 02-Feb-2002