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J/A+A/530/A138      Geneva-Copenhagen survey re-analysis     (Casagrande+, 2011)

New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Casagrande L., Schoenrich R., Asplund M., Cassisi S., Ramirez I., Melendez J., Bensby T., Feltzing S. <Astron. Astrophys. 530, A138 (2011)> =2011A&A...530A.138C
ADC_Keywords: Stars, nearby ; Abundances, [Fe/H]; Positional data; Radial velocities ; Space velocities ; Effective temperatures ; Stars, ages ; Stars, masses Keywords: stars: abundances - stars: fundamental parameters - Hertzsprung-Russell and C-M diagrams - stars: kinematics and dynamics - Galaxy: disk - solar neighborhood Abstract: We present a re-analysis of the Geneva-Copenhagen survey, benefiting from the infrared flux method to improve upon the accuracy of the derived stellar effective temperatures and using the latter to build a consistent and improved metallicity scale. Metallicities are calibrated on high-resolution spectroscopy and checked against four open clusters and a moving group, showing excellent consistency. The new temperature and metallicity scales provide a better match to theoretical isochrones, which are used for a Bayesian analysis of stellar ages. With respect to previous analyses, our stars are on average 100K hotter and 0.1dex more metal rich, shifting the peak of the metallicity distribution function around the solar value. From Stromgren photometry we are able to derive for the first time a proxy for [Fe] abundances, which enables for a tentative dissection of the chemical thin and thick disc. We find evidence for the latter being composed of an old, mildly but systematically alpha-enhanced population extending to super solar metallicities, in agreement with spectroscopic studies. Our revision offers the largest existing kinematically unbiased sample of the solar neighbourhood that contains full information on kinematics, metallicities and ages and thus provides better constraints on the physical processes relevant in the build-up of the Milky Way disc, enabling a better understanding of the Sun in a Galactic context. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file catalog.dat 441 16682 *Stellar parameters
Note on catalog.dat: derived from the revision of the Geneva-Copenhagen Survey (this paper) supplemented with kinematic parameters provided in previous versions of the Geneva-Copenhagen Survey (GCSI Nordstrom et al. 2004A&A...418..989N, See Cat. V/117; GCSIII Holmberg et al. 2009, Cat. V/130)
See also: V/117 : Geneva-Copenhagen Survey of Solar neighbourhood (Holmberg+, 2007) V/130 : Geneva-Copenhagen Survey of Solar neighbourhood III (Holmberg+, 2009) J/A+A/512/A54 : Teff and Fbol from Infrared Flux Method (Casagrande+, 2010) Byte-by-byte Description of file: catalog.dat
Bytes Format Units Label Explanations
1- 4 A4 --- pedig irfm or clbr (1) 6- 11 I6 --- HIP ? Hipparcos number (2) 13- 24 A12 --- Name Other name (3) 25- 28 A4 --- m_Name Components included in photometry 30- 35 F6.2 mas plx HIP parallax (4) 38- 42 F5.2 mas e_plx ?=-9.99 HIP parallax error (4) 44- 48 F5.2 [cm/s2] logg ?=-9.99 Surface gravity (5) 50- 54 F5.0 K Teff ?=-999 Effective temperature (6) 57- 61 F5.0 K e_Teff ?=-999 Teff error (7) 63- 74 E12.5 mW/m2 Fbol ?=-9.99990E-09 Bolometric flux (8) 76- 80 F5.2 [Sun] [Fe/H] ?=-9.99 Metallicity 82- 86 F5.2 [Sun] [M/H] ?=-9.99 Overall metallicity 88- 92 F5.2 [Sun] [a/Fe] ?=-9.99 [α/Fe] proxy 96-100 F5.3 mag E(B-V) Reddening correction 102 I1 --- l [0/1] Quality index (9) 104-105 I2 h RAh Right ascension (J2000) 107-108 I2 min RAm Right ascension (J2000) 110-113 F4.1 s RAs Rigth ascension (J2000) 115 A1 --- DE- Declination sign (J2000) 116-117 I2 deg DEd Declination (J2000) 119-120 I2 arcmin DEm Declination (J2000) 122-123 I2 arcsec DEs Declination (J2000) 125-130 F6.2 deg GLON [0/360] Galactic longitude 132-137 F6.2 deg GLAT Galactic latitude 140-145 F6.1 km/s RV ?=-999.9 GCSI Mean radial velocity 147-152 F6.1 km/s meRV ?=-999.9 GCSI Mean error of radial velocity 154-159 F6.1 km/s e_RV ?=-999.9 GCSI Std dev of RV measurements 164-166 I3 --- o_RV ?=-9 GCSI Number of RV measurements 170-173 I4 d dT ?=-9 GCSI Time-span RV measurements 175-180 F6.3 --- P(chi2) ?=-9.999 GCSI Probability of constant RV 186-190 I5 mas/a pmRA ?=-9999 GCSI Proper motion in RA 193-197 I5 mas/a pmDE ?=-9999 GCSI Proper motion in DE 203-204 I2 mas/a e_pm ?=-9 GCSI Error of total proper motion 207-212 F6.3 kpc Rgal ?=-9.999 GCSI Galactic radial position 214-219 F6.3 kpc zgal ?=-9.999 GCSI Galactic vertical position 225-230 I6 km/s UVel ?=-99999 GCSIII Heliocentric space velocity U 232-237 I6 km/s VVel ?=-99999 GCSIII Heliocentric space velocity V 239-244 I6 km/s WVel ?=-99999 GCSIII Heliocentric space velocity W 246-251 F6.2 kpc Rmin ?=-99.99 GCSIII Perigalactic distance 253-258 F6.2 kpc Rmax ?=-99.99 GCSIII Apogalactic distance 261-265 F5.2 --- ecc ?=-9.99 GCSIII Eccentricity of galactic orbit 268-272 F5.2 kpc zmax ?=-9.99 GCSIII Max distance from galactic plane 275-279 F5.2 Gyr ageMLP ?=-9.99 Padova Max likelihood age 281-285 F5.2 Gyr ageEP ?=-9.99 Padova Expectation age 287-291 F5.2 Gyr age5P ?=-9.99 Padova 5% age 293-297 F5.2 Gyr age16P ?=-9.99 Padova 16% age 299-303 F5.2 Gyr ageMP ?=-9.99 Padova Median age 305-309 F5.2 Gyr age84P ?=-9.99 Padova 84% age 311-315 F5.2 Gyr age95P ?=-9.99 Padova 95% age 317-321 F5.2 Gyr ageMLB ?=-9.99 BASTI Max likelihood age 323-327 F5.2 Gyr ageEB ?=-9.99 BASTI Expectation age 329-333 F5.2 Gyr age5B ?=-9.99 BASTI 5% age 335-339 F5.2 Gyr age16B ?=-9.99 BASTI 16% age 341-345 F5.2 Gyr ageMB ?=-9.99 BASTI Median age 347-351 F5.2 Gyr age84B ?=-9.99 BASTI 84% age 353-357 F5.2 Gyr age95B ?=-9.99 BASTI 95% age 359-363 F5.2 Msun M.MLP ?=-9.99 Padova Max likelihood mass 365-369 F5.2 Msun M.EP ?=-9.99 Padova Expectation mass 371-375 F5.2 Msun M.5P ?=-9.99 Padova 5% mass 377-381 F5.2 Msun M.16P ?=-9.99 Padova 16% mass 383-387 F5.2 Msun M.MP ?=-9.99 Padova Median mass 389-393 F5.2 Msun M.84P ?=-9.99 Padova 84% mass 395-399 F5.2 Msun M.95P ?=-9.99 Padova 95% mass 401-405 F5.2 Msun M.MLB ?=-9.99 BASTI Max likelihood mass 407-411 F5.2 Msun M.EB ?=-9.99 BASTI Expectation mass 413-417 F5.2 Msun M.5B ?=-9.99 BASTI 5% mass 419-423 F5.2 Msun M.16B ?=-9.99 BASTI 16% mass 425-429 F5.2 Msun M.MB ?=-9.99 BASTI Median mass 431-435 F5.2 Msun M.84B ?=-9.99 BASTI 84% mass 437-441 F5.2 Msun M.95B ?=-9.99 BASTI 95% mass
Note (1): * Stars with "irfm" pedigree have best quality photometry, are likely to be single and non-variable (see Section 2 in the paper). For these stars, effective temperatures and bolometric fluxes have been computed via InfraRed Flux Method directly. * "clbr" identifies all remaining stars, for which effective temperatures and bolometric fluxes have been obtained using the colour-metallicity-temperature and colour-metallicity-flux calibrations in Casagrande et al. (2010, Cat. J/A+A/512/A54). NOTICE that some clbr stars might include double or multiple components (often recognizable by their Name e.g. HD XXXXX/X or HD XXXX AB), for which matching the closest Tycho2 and 2MASS photometry might be more uncertain. Therefore in some cases the photometry might result in a mix of the two sources and so are the derived parameters, which should not be used. It is responsibility of the user to take extra care in identifying cases likely affected by this issue. Note (2): If Hipparcos number is not available, then no value is given. NOTICE that Hipparcos numbers are taken from the original Geneva-Copenhagen catalogue, where in some cases the same number is attributed to different components of multiple systems. Note (3): as given in the original Geneva-Copenhagen catalogue. Note (4): set to -9.99 in case of negative parallaxes or if not determined. From van Leeuwen (2007, Cat. I/311) for the irfm sample. Directly from GCSIII (2009, Cat. V/130) for clbr stars. Note (5): computed from the fundamental definition involving Teff, Fbol and mass. BASTI expectation masses have been used. Note (6): derived via InfraRed Flux Method for stars having irfm pedigree. Using colour-metallicity-temperature calibrations for stars having clbr pedigree. Note (7): Computed via MonteCarlo for stars having irfm pedigree. Obtained from the standard deviation of different colour-metallicity-temperature calibrations in other cases. In the latter case, even if the formal standard deviation was very small, a minimum value of 80K is given. Note (8): Bolometric flux arriving on the Earth. Derived via InfraRed Flux Method for stars having irfm pedigree. Using colour-metallicity-flux calibrations for stars having clbr pedigree. Note (9): Index for the metallicity calibration as follows: 0 = If the calibration is applied within its range. (Only metallicities having l=0 should be used) 1 = otherwise
History: 26-May-2011: on-line version 20-Jul-2012: some -00 DEd values corrected into +00 DEd, from author. Acknowledgements: Luca Casagrande, luca(at)MPA-Garching.MPG.DE
(End) Patricia Vannier [CDS] 08-Apr-2011
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