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 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 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