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J/A+A/511/L10   Abundances and space velocities of 94 stars   (Nissen+, 2010)

Two distinct halo populations in the solar neighborhood. Evidence from stellar abundance ratios and kinematics. Nissen P.E., Schuster W.J. <Astron. Astrophys. 511, L10 (2010)> =2010A&A...511L..10N
ADC_Keywords: Stars, nearby ; Abundances ; Space velocities Keywords: stars: abundances - stars: kinematics - Galaxy: halo - Galaxy: formation Abstract: Precise abundance ratios are determined for 94 dwarf stars with 5200<Teff<6300K, -1.6<[Fe/H]←0.4, and distances D≲335pc. Most of them have halo kinematics, but 16 thick-disk stars are included. Equivalent widths of atomic lines are measured from VLT/UVES and NOT/FIES spectra with resolutions R∼55000 and R∼40000, respectively. An LTE abundance analysis based on MARCS models is applied to derive precise differential abundance ratios of Na, Mg, Si, Ca, Ti, Cr, and Ni with respect to Fe. Description: Atmospheric parameters, abundance ratios, and space velocities are given for halo and thick-disk stars observed with the ESO VLT/UVES and NOT/FIES spectrographs at high resolution. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file stars.dat 74 94 Star list table3.dat 97 53 Data based on VLT/UVES spectra table4.dat 97 47 Data based on NOT/FIES spectra
Byte-by-byte Description of file: stars.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Simbad name 11 A1 --- m_Name Multiplicity index on Name 13- 14 I2 h RAh Simbad Hour of Right Ascension (J2000.0) 16- 17 I2 min RAm Simbad Minute of Right Ascension (J2000.0) 19- 22 F4.1 s RAs Simbad Second of Right Ascension (J2000.0) 24 A1 --- DE- Simbad Sign of the Declination (J2000.0) 25- 26 I2 deg DEd Simbad Degree of Declination (J2000.0) 28- 29 I2 arcmin DEm Simbad Arcminute of Declination (J2000.0) 31- 32 I2 arcsec DEs Simbad Arcsecond of Declination (J2000.0) 35- 40 F6.3 mag Bmag Simbad B band magnitude 42- 47 F6.3 mag Vmag Simbad V band magnitude 49- 56 A8 --- SpType Simbad MK spectral type 58- 65 A8 --- Inst Instrument used 67- 74 A8 --- Inst2 Second Instrument used
Byte-by-byte Description of file: table3.dat table4.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Object name 11 A1 --- m_Name Multiplicty index on Name 13- 16 I4 K Teff Effective temperature 18- 21 F4.2 cm/s2 logg Logarithmic surface gravity 23- 27 F5.2 [Sun] [Fe/H] Iron-to-hydrogen ratio 29- 31 F3.1 km/s ksi Micro-turbulence velocity 33- 37 F5.2 [Sun] [Na/Fe] Sodium-to-iron ratio 39- 42 F4.2 [Sun] [Mg/Fe] Magnesium-to-iron ratio 44- 47 F4.2 [Sun] [Si/Fe] Silicon-to-iron ratio 49- 52 F4.2 [Sun] [Ca/Fe] Calcium-to-iron ratio 54- 57 F4.2 [Sun] [Ti/Fe] Titanium-to-iron ratio 59- 63 F5.2 [Sun] [Cr/Fe] Chromium-to-iron ratio 65- 69 F5.2 [Sun] [Ni/Fe] Nickel-to-iron ratio 71- 74 I4 km/s U(LSR) Galactic U-velocity component relative to LSR 76- 79 I4 km/s V(LSR) Galactic V-velocity component relative to LSR 81- 84 I4 km/s W(LSR) Galactiv W-velocity component relative to LSR 86- 97 A12 --- Class Population (1)
Note (1): Classification of star as belonging to the thick-disk (TD), the low-alpha halo, or the high-alpha halo population. For stars with [Fe/H]←1.4, the classification is uncertain and given in parentheses.
Acknowledgements: Poul Erik Nissen, pen(at)phys.au.dk
(End) Poul Erik Nissen [Aarhus University], Patricia Vannier [CDS] 01-Mar-2010
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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