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J/ApJ/613/312  Synthetic Lick indices of alpha-enhanced stars (Franchini+, 2004)

Synthetic Lick indices and detection of α-enhanced stars. II. F, G, and K stars in the -1.0 < [Fe/H] < +0.50 range. Franchini M., Morossi C., Di Marcantonio P., Malagnini M.L., Chavez M., Rodriguez-Merino L. <Astrophys. J., 613, 312-321 (2004)> =2004ApJ...613..312F
ADC_Keywords: Abundances, [Fe/H] ; Stars, late-type Keywords: Galaxy: stellar content - stars: abundances - stars: kinematics - stars: late-type Abstract: We present an analysis of 402 F, G, and K solar neighborhood stars, with accurate estimates of [Fe/H] in the range -1.0 to +0.5dex, aimed at the detection of α-enhanced stars and at the investigation of their kinematical properties. The analysis is based on the comparison of 571 sets of spectral indices in the Lick/IDS system, coming from four different observational data sets, with synthetic indices computed with solar-scaled abundances and with α-element enhancement. We use selected combinations of indices to single out α-enhanced stars without requiring previous knowledge of their main atmospheric parameters. By applying this approach to the total data set, we obtain a list of 60 bona fide α-enhanced stars and of 146 stars with solar-scaled abundances. The properties of the detected α-enhanced and solar-scaled abundance stars with respect to their [Fe/H] values and kinematics are presented. A clear kinematic distinction between solar-scaled and α-enhanced stars was found, although a one-to-one correspondence to "thin disk" and "thick disk" components cannot be supported with the present data. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 53 402 Detection of α-enhanced candidate stars
See also: J/ApJ/601/485 : Synthetic Lick indices of alpha-enhanced stars (Franchini+, 2004) J/ApJS/94/687 : Old stellar populations. V. (Worthey+, 1994) J/PASP/113/1365 : Super-metal-rich stars (Buzzoni+, 2001) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HD The HD number 8- 16 A9 --- SpType SIMBAD MK spectral type 18- 23 F6.3 [Sun] [Fe/H] Log of the Fe/H number abundance 25- 29 F5.3 [Sun] e_[Fe/H] Error in [Fe/H] 31 A1 --- LC [dg]Luminosity code (1) 33- 36 A4 --- Cananea The Cananea classification (2) 38- 41 A4 --- STELIB The STELIB classification (2) 43- 46 A4 --- ELODIE The ELODIE classification (2) 48- 51 A4 --- Worthey The Worthey classification (2) 53 A1 --- Class Star classification with respect to α-enhancement (3)
Note (1): Type code: d = dwarf; g = giant. Note (2): In the following 4 character wide columns we indicate the presence of the star in each data-set and its classification with respect to α-enhancement in each of the four index-index diagrams. The capital letter "Y" is used for bona fide α-enhanced candidates and the capital letter "N" is used for SSA (solar-scaled abundance) candidates. The stars marked with "////" are too cool to be compared with our SSA and NSSA (non-SSA) grids; their low temperatures are inferred from the position of the observed points in the diagrams and confirmed by looking at data in Taylor (2003, Cat. J/A+A/398/721) and by using temperature estimates from broad-band photometry. Note (3): Star classification with respect to α-enhancement as follows: ? = No classification achieved; S = Classified as SSA (solar-scaled abundance); A = Classified as α-enhanced; C = Contradictory case (HD 43318 and HD 198149: it is very likely that in both cases the discrepancy can be attributed to observational problems).
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 17-Feb-2005
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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