V/117A Geneva-Copenhagen Survey of Solar neighbourhood (Holmberg+, 2007)
The Geneva-Copenhagen survey of the Solar neighbourhood.
I. Ages, metallicities, and kinematic properties of ∼14000 F and G dwarfs.
Nordstrom B., Mayor M., Andersen J., Holmberg J., Pont F., Jorgensen B.R.,
Olsen E.H., Udry S., Mowlavi N.
<Astron. Astrophys. 419, 989 (2004)>
=2004A&A...418..989N 2004A&A...418..989N
II. New uvby calibrations and rediscussion of stellar ages, the G dwarf problem,
age-metallicity diagram, and heating mechanisms of the disk.
Holmberg J., Nordstroem B., Andersen J.
<Astron. Astrophys. 475, 519 (2007)>
=2007A&A...475..519H 2007A&A...475..519H
ADC_Keywords: Stars, F-type; Stars, G-type; Abundances, [Fe/H] ;
Positional data ; Photometry, uvby; Radial velocities ;
Stars, ages ; Stars, distances ; Stars, masses; Space velocities ;
Effective temperatures
Keywords: Galaxy: disk - Galaxy: solar neighbourhood - Galaxy: stellar content
Galaxy: kinematics and dynamics - Galaxy: evolution -
Stars: fundamental parameters
Abstract (from paper II, 2007)
Ages, metallicities, space velocities, and Galactic orbits of stars in
the Solar neighbourhood are fundamental observational constraints on
models of galactic disk evolution. Understanding and minimising
systematic errors and sample selection biases in the data is crucial
for their interpretation. We aim to consolidate the calibrations of
uvbyb photometry into Teff, [Fe/H], distance, and age for F and G
stars and rediscuss the results of the Geneva-Copenhagen Survey
(GCS, Nordstrom et al., 2004, paper I) in terms of the evolution of
the disk. We use recent V-K photometry, angular diameters,
high-resolution spectroscopy, Hipparcos parallaxes, and extensive
numerical simulations to re-examine and verify the temperature,
metallicity, distance, and reddening calibrations for the uvbyb
system. We also highlight the selection effects inherent in the
apparent-magnitude limited GCS sample. We substantially improve the
Teff and [Fe/H] calibrations for early F stars, where spectroscopic
temperatures have large systematic errors. A slight offset of the GCS
photometry and the non-standard helium abundance of the Hyades
invalidate its use for checking metallicity or age scales; however,
the distances, reddenings, metallicities, and age scale for GCS field
stars require minor corrections only. Our recomputed ages are in
excellent agreement with the independent determinations by Takeda et
al. (2007ApJS..168..297T 2007ApJS..168..297T), indicating that isochrone ages can now be
reliably determined. The revised G-dwarf metallicity distribution
remains incompatible with closed-box models, and the age-metallicity
relation for the thin disk remains almost flat, with large and real
scatter at all ages sigma_intrinsic=0.20 dex). Dynamical heating of
the thin disk continues throughout its life; specific in-plane
dynamical effects dominate the evolution of the U and V velocities,
while the W velocities remain random at all ages. When assigning thick
and thin-disk membership for stars from kinematic criteria, parameters
for the oldest stars should be used to characterise the thin disk.
Abstract (from Paper I, 2004):
We present and discuss new determinations of metallicity, rotation,
age, kinematics and Galactic orbits for a complete, magnitude-limited,
and kinematically unbiased sample of 16682 nearby F and G dwarf stars.
Our ∼63000 new, accurate radial-velocity observations for nearly 13500
stars allow identification of most of the binary stars in the sample,
and together with published uvby-β photometry, Hipparcos
parallaxes, Tycho-2 proper motions, and a few earlier radial
velocities, complete the kinematic information for 14139 stars. These
high-quality velocity data are supplemented by effective temperatures
and metallicities newly derived from recent and/or revised
calibrations. The remaining stars either lack Hipparcos data or have
fast rotation. A major effort has been devoted to the determination of
new isochrone ages for all stars for which this is possible.
Particular attention has been given to a realistic treatment of
statistical biases and error estimates, as standard techniques tend to
underestimate these effects and introduce spurious features in the age
distributions.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
newcat.dat 96 16682 Main catalogue recalibrated data (2007)
table1.dat 287 16682 First version of the catalog (2004)
table2.dat 23 510 Mass ratios for doubled-lined binaries (2004)
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See also:
J/A+A/329/943 : F + G solar neighbourhood stars new ages (Ng+ 1998)
J/A+A/377/911 : Age-metallicity relation in solar neighbourhood
(Feltzing+, 2001)
J/A+A/394/927 : Age-metallicity relation for nearby stars (Ibukiyama+, 2002)
J/MNRAS/325/1365 : Solar neighbourhood metallicity distribution (Haywood+ 2001)
Byte-by-byte Description of file: newcat.dat
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Bytes Format Units Label Explanations
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1- 6 I6 -- HIP ? Hipparcos number if available
8- 18 A11 -- Name Object name (HD,BD,CD or CP) (1)
20- 23 A4 -- Comp Components included in photometry (2)
25- 26 I2 h RAh Right ascension (ICRF)
28- 29 I2 min RAm Right ascension (ICRF)
31- 34 F4.1 s RAs Right ascension (ICRF)
36 A1 -- DE- Declination sign (ICRF)
37- 38 I2 deg DEd Declination (ICRF)
40- 41 I2 arcmin DEm Declination (ICRF)
43- 44 I2 arcsec DEs Declination (ICRF)
46- 50 F5.3 [K] logTe ? Effective temperature
52- 56 F5.2 [Sun] [Fe/H] ? Metallicity
58- 60 I3 pc Dist ? Distance
62- 66 F5.2 mag VMAG ? Absolute magnitude
68- 71 F4.1 Gyr Age ? Age, in Gigayears
73- 76 F4.1 Gyr clAge ? Lower confidence limit on Age
78- 81 F4.1 Gyr chAge ? Upper confidence limit on Age
83- 86 I4 km/s UVel ? Heliocentric space velocity component U (3)
88- 91 I4 km/s VVel ? Heliocentric space velocity component V (3)
93- 96 I4 km/s WVel ? Heliocentric space velocity component W (3)
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Note (1): Object name given in order of preference. A second number
following a slash indicates that a double star with separate HD
numbers has been observed together.
Note (2): If the star is a member of a multiple system the component(s)
included in the photometry are identified here.
Note (3): Heliocentric space velocity components given in a right handed
coordinate system with U towards the galactic centre.
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 -- HIP ? Hipparcos number if available
8- 18 A11 -- Name Object name (HD,BD,CD or CP) (1)
20- 23 A4 -- Comp Components included in photometry (2)
25 A1 -- fb Flag for binaries of all types (3)
27 A1 -- fs Flag for cool dwarfs south of -26deg
29- 30 I2 h RAh Right ascension (J2000.0) (4)
32- 33 I2 min RAm Right ascension (J2000.0) (4)
35- 38 F4.1 s RAs Right ascension (J2000.0) (4)
40 A1 -- DE- Declination sign (J2000.0) (4)
41- 42 I2 deg DEd Declination (J2000.0) (4)
44- 45 I2 arcmin DEm Declination (J2000.0) (4)
47- 48 I2 arcsec DEs Declination (J2000.0) (4)
50- 52 I3 deg GLON Galactic longitude
54- 56 I3 deg GLAT Galactic latitude
58- 63 F6.3 mag Vmag Johnson V magnitude
65- 69 F5.3 mag b-y Stromgren b-y colour
71- 75 F5.3 mag Hbeta ? Stromgren Hbeta index
77- 82 F6.3 mag E(b-y) ? Colour excess (5)
84- 88 F5.3 [K] logTe ? Effective temperature (6)
90- 94 F5.2 [Sun] [Fe/H] ? Metallicity (7)
96- 98 I3 pc Dist ? Distance (8)
100-104 F5.2 mag VMAG ? Absolute magnitude
106-110 F5.2 mag dVMag ? Magnitude difference to ZAMS
112 A1 -- fr Source for the distance (8)
114 A1 -- fg Flag for suspected giants (9)
116-119 F4.1 Gyr Age ? Age, in Gigayears
121-124 F4.1 Gyr clAge ? Lower confidence limit on Age
126-129 F4.1 Gyr chAge ? Upper confidence limit on Age
131-134 F4.2 solMass mass ? Mass, in solar masses
136-139 F4.2 solMass clmass ? Lower confidence limit on mass
141-144 F4.2 solMass chmass ? Upper confidence limit on mass
146-156 A11 -- --- Object name (HD,BD,CD or CP) repeated
158-163 F6.1 km/s RVel ? Mean radial velocity (10)
165-168 F4.1 km/s meRVel ? Mean error of radial velocity
170-174 F5.1 km/s e_RVel ? Standard deviation of RVel measurements
176-178 I3 -- o_RVel ? Number of RVel measurements
180-183 I4 d dT ? Time-span of RVel measurements
185-189 F5.3 -- P(chi2) ? Probability of constant RVel
191 A1 -- fd Flag for spectroscopic binaries (10)
193 A1 -- fv Source of RVel (11)
195-197 I3 km/s vsini ? Rotational velocity
199-203 I5 mas/a pmRA ? Proper motion in right ascension (4)
205-209 I5 mas/a pmDE ? Proper motion in declination (4)
211-212 I2 mas/a e_pm ? Standard error of total proper motion (4)
214-218 F5.1 mas plx ? Hipparcos parallax
220-223 F4.1 mas e_plx ? Standard error of parallax
225-228 I4 km/s UVel ? Heliocentric space velocity component U (12)
230-233 I4 km/s VVel ? Heliocentric space velocity component V (12)
235-238 I4 km/s WVel ? Heliocentric space velocity component W (12)
240-245 F6.3 kpc Rgal ? Galactic radial position (13)
247-252 F6.3 kpc zgal ? Galactic vertical position (13)
254-260 F7.2 kpc Rmin ? Perigalactic distance
262-268 F7.2 kpc Rmax ? Apogalactic distance
270-274 F5.2 -- ecc ? Eccentricity of galactic orbit
276-282 F7.2 kpc zmax ? Maximum distance from galactic plane
284-287 A4 -- Notes General note (14)
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Note (1): Object name given in order of preference.
A second number following a slash indicates that a double star with
separate HD numbers has been observed together.
Note (2): If the star is a member of a multiple system the component(s)
included in the photometry are identified here.
Note (3): This flag identifies confirmed and suspected binaries.
The information can come from one or several sources such as
photometry, radial velocity or astrometry.
Note (4): From the Tycho-2 catalogue.
Note (5): From the calibration of Olsen (1988A&A...189..173O 1988A&A...189..173O)
if E(b-y)≥0.02 and Dist>40pc; otherwise the star is assumed
to be unreddened.
Note (6): From the calibration of Alonso et al. (1996A&A...313..873A 1996A&A...313..873A)
Note (7): From the calibrations by Schuster & Nissen (1989A&A...221...65S 1989A&A...221...65S),
Edvardsson et al. (1993A&A...275..101E 1993A&A...275..101E), or the one defined in Sect
4.3 of the present paper.
Note (8): Source for the distance:
H = Hipparcos parallax,
F,G = F or G-star photometric distance.
If a Hipparcos distance with relative error below 13% is available,
this is used, otherwise a photometric distance is used.
Note (9): Flag for suspected giants.
Indicates a disagreement between the photometric distance
determination and the Hipparcos parallax at the 3 sigma level,
suggesting that the star is a giant not detected from the photometry.
Note (10): Mean radial velocity. For double lined binaries, the
computed systemic velocity is given if so indicated by the fd flag.
Note (11): Source of the radial velocity:
C: Coravel, presented in the present paper
A: CfA from Nordstrom et al. (1997, Cat. J/A+AS/126/21)
L: literature from Barbier-Brossat & Figon (2000A&AS..142..217B 2000A&AS..142..217B,
Cat. III/213)
Note (12): Heliocentric space velocity components given in a right handed
coordinate system with U towards the galactic centre.
Note (13): With the solar position 8.000kpc from the galactic centre,
and 7pc above the plane.
Note (14): Global notes:
a = Double star with Deltamag<5mag
b = Double star with Hipparcos measurement of Deltamag<5mag
c = Variable star
d = Simbad note
e = Olsen (1983A&AS...54...55O 1983A&AS...54...55O)
f = Olsen (1979A&AS...37..367O 1979A&AS...37..367O)
g = Olsen (1980A&AS...39..205O 1980A&AS...39..205O)
h = Olsen (1993A&AS..102...89O 1993A&AS..102...89O)
i = Olsen (1994A&AS..104..429O 1994A&AS..104..429O)
j = Olsen (1994A&AS..106..257O 1994A&AS..106..257O)
k = Abt et al. (1979PASP...91..176A 1979PASP...91..176A)
l = Abt (1984ApJ...285..247A 1984ApJ...285..247A)
m = Abt (1986ApJ...309..260A 1986ApJ...309..260A)
n = Gray & Garrison (1989ApJS...69..301G 1989ApJS...69..301G)
o = Gray (1989AJ.....89.1049G 1989AJ.....89.1049G)
p = Henry et al. (1996AJ....111..439H 1996AJ....111..439H)
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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- 11 A11 -- Name HD number
13- 17 F5.3 -- mratio Mass ratio (1)
19- 23 F5.3 -- e_mratio ? Estimated uncertainty of the mass ratio (1)
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Note (1): For spectroscopic binaries with multiple observations containing
double correlation peaks, the centre-of-mass velocity and the mass
ratio of the binary may be computed by the method of Wilson
(1941ApJ....93...29W 1941ApJ....93...29W). If only two observations are available,
no uncertainty can be estimated.
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Acknowledgements:
Johan Holmberg, johan(at)astro.ku.dk
Birgitta Nordstrom, birgitta(at)astro.ku.dk
(End) Patricia Bauer [CDS] 30-Sep-2008