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J/A+A/489/923     Abundances of stars in lower main sequence  (Mishenina+, 2008)

Spectroscopic investigation of stars on the lower main sequence. Mishenina T.V., Soubiran C., Bienayme O., Korotin S.A., Belik S.I., Usenko I.A., Kovtyukh V.V. <Astron. Astrophys., 489, 923-930 (2008)> =2008A&A...489..923M
ADC_Keywords: Stars, late-type ; Abundances Keywords: stars: fundamental parameters - stars: abundances - stars: late-type Abstract: The aim of this paper is to provide fundamental parameters and abundances with a high accuracy for a large sample of cool main sequence stars. This study is part of wider project, in which the metallicity distribution of the local thin disc is investigated from a complete sample of G and K dwarfs within 25pc. The stars were observed at high resolution and a high signal-to-noise ratio with the ELODIE echelle spectrograph. The Vsini were obtained with a calibration of the cross-correlation function. Effective temperatures were estimated by the line depth ratio method. Surface gravities (logg) were determined by two methods: parallaxes and ionization balance of iron. The Mg and Na abundances were derived using a non-LTE approximation. Abundances of other elements were obtained by measuring equivalent widths. Rotational velocities, atmospheric parameters Teff, logg, [Fe/H], Vt, and Li, O, Na, Mg, Al, Si, Ca, Sc, Ti, V, Cr, Co, Ni, and Zn abundances are provided for 131 stars. Among them, more than 30 stars are active stars with a fraction of BY Dra and RS CVn type stars for which spectral peculiarities were investigated. We find the mean abundances of the majority of elements in active and non-active stars to be similar, except for Li, and possibly for Zn and Co. The lithium is reliably detected in 54% of active stars but only in 20% of non -active stars. No correlation is found between Li abundances and rotational velocities. A possible anticorrelation of log A(Li) with the index of chromospheric activity GrandS is observed. Active and non active cool dwarfs show similar dependencies of most elemental ratios vs [Fe/H]. This allows us to use such abundance ratios to study the chemical and dynamical evolution of the Galaxy. Among active stars, no clear correlation has been found between different indicators of activity for our sample stars. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tablea1.dat 70 131 The basic characteristics of studied stars tablea2.dat 75 131 The abundances of Li, O, Na, Mg, Al, Si, Ca, and S c in atmospheres of studied stars tablea3.dat 59 131 The abundances of Ti, V, Cr, Co, Ni, and Zn in atmospheres of studied stars
See also: III/251 : ELODIE library V3.1 (Prugniel+ 2007) Byte-by-byte Description of file: tablea1.dat
Bytes Format Units Label Explanations
1- 10 A10 --- HD/BD HD/BD name 12- 15 F4.2 mag Vmag V magnitude 18- 21 F4.2 mag Mbol Bolometric absolute magnitude 24- 28 F5.2 km/s vsini ?=- Rotation velocity 32- 35 I4 K Teff Mean effective temperature of the star 38- 41 F4.1 K e_Teff rms uncertainty on Teff (standard error of the mean) 45- 48 F4.2 [cm/s2] logg Surface gravity determined using parallaxes 52- 55 F4.2 [cm/s2] loggIE ?=- Surface gravity determined using ionization balance of iron 59- 63 F5.2 [Sun] [Fe/H] Metallicity 68- 70 F3.1 km/s Vt Microturbulent velocity
Byte-by-byte Description of file: tablea2.dat
Bytes Format Units Label Explanations
1- 10 A10 --- HD/BD HD/BD name 12- 16 F5.2 [Sun] [Fe/H] Metallicity 20 A1 --- l_logA(Li) Limit flag on logA(Li) 21- 25 F5.2 [Sun] logA(Li) ?=- Lithium abundance 29- 33 F5.2 --- [O/Fe] ?=- Abundance of O 36- 40 F5.2 --- [Na/Fe] ?=- Abundance of Na 43- 47 F5.2 --- [Mg/Fe] Abundance of Mg 50- 54 F5.2 --- [Al/Fe] Abundance of Al 57- 61 F5.2 --- [Si/Fe] Abundance of Si 64- 68 F5.2 --- [Ca/Fe] Abundance of Ca 71- 75 F5.2 --- [Sc/Fe] Abundance of Sc
Byte-by-byte Description of file: tablea3.dat
Bytes Format Units Label Explanations
1- 10 A10 --- HD/BD HD/BD name 13- 17 F5.2 --- [Fe/H] Metallicity 20- 24 F5.2 --- [Ti/Fe] Abundance of Ti 27- 31 F5.2 --- [V/Fe] Abundance of V 34- 38 F5.2 --- [Cr/Fe] Abundance of Cr 41- 45 F5.2 --- [Co/Fe] Abundance of Co 48- 52 F5.2 --- [Ni/Fe] Abundance of Ni 55- 59 F5.2 --- [Zn/Fe] Abundance of Zn
Acknowledgements: V. Kovtyukh, val(at)deneb.odessa.ua
(End) Patricia Vannier [CDS] 18-Mar-2009
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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