*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
V/117A ==OBSOLETE version of Catalogue==
23-Jul-2009: (by Francois Ochsenbein) See V/130
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=V/117A
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
drwxr-xr-x 146 cats archive 4096 Aug 1 2023 [Up]
drwxr-xr-x 2 cats archive 4096 Jan 12 2023 [TAR file]
-rw-r--r-- 1 cats archive 390 Dec 19 2022 .message
-r--r--r-- 1 cats archive 15633 Oct 3 2008 ReadMe
-rw-r--r-- 1 cats archive 1448 Oct 4 2008 +footg5.gif
-rw-r--r-- 1 cats archive 29027 Oct 4 2008 +footg8.gif
-r--r--r-- 1 cats archive 481749 Sep 30 2008 newcat.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html]
-r--r--r-- 1 cats archive 1422025 May 6 2004 table1.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html]
-r--r--r-- 2 cats archive 12240 May 13 2004 table2.dat [txt] [txt.gz] [fits] [fits.gz] [html]
Beginning of ReadMe :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
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
================================================================================
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 T_eff_, [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
T_eff_ 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), 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-beta 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.