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J/A+A/523/A17       Individual stars in Fornax dSph center   (Letarte+, 2010)

A high-resolution VLT/FLAMES study of individual stars in the centre of the Fornax dwarf spheroidal galaxy. Letarte B., Hill V., Tolstoy E., Jablonka P., Shetrone M., Venn K.A., Spite M., Irwin M.J., Battaglia G., Helmi A., Primas F., Francois P., Kaufer A., Szeifert T., Arimoto N., Sadakane K. <Astron. Astrophys., 523, A17-17 (2010)> =2010A&A...523A..17L
ADC_Keywords: Galaxies, nearby ; Stars, giant ; Abundances ; Radial velocities Keywords: stars: abundances - galaxies: dwarf - galaxies: evolution - galaxies: formation - galaxies: stellar content - galaxies: individual: Fornax dwarf galaxy Abstract: For the first time we show the detailed, late-stage, chemical evolution history of a small nearby dwarf spheroidal galaxy in the Local Group. We present the results of a high-resolution (R∼20000, λ=5340-5620; 6120-6701) FLAMES/GIRAFFE abundance study at ESO/VLT of 81 photometrically selected, red giant branch stars in the central 25' of the Fornax dwarf spheroidal galaxy. We also carried out a detailed comparison of the effects of recent developments in abundance analysis (e.g., spherical models vs. plane-parallel) and the automation that is required to efficiently deal with such large data sets. We present abundances of alpha-elements (Mg, Si, Ca, and Ti), iron-peak elements (Fe, Ni, and Cr), and heavy elements (Y, Ba, La, Nd, and Eu). Description: Observations were made in 12 runs, from 2003-09-29 to 2004-01-26. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tablea1.dat 20 107 Radial velocities and associated errors for our Fornax targets tablea2.dat 31 81 Stellar parameters of the model used for our sample of 81 stars, along with the minimum EW used for each star tablea3.dat 71 109 Coordinates and photometric temperatures in different colours, shifted on the Teff(V-I) scale tablea4.dat 36 11259 List of all the lines, their associated parameters and their measured equivalent width for our sample of 81 stars tablea5.dat 204 81 *Abundance ratio of the Fornax Field stars
Note on tablea5.dat: The quoted error is the error on [element/H], not [X/Fe].
See also: J/AJ/127/840 : VRI photometry of Fornax red giants (Pont+, 2004) J/AJ/131/912 : BR photometry of Fornax dSph center (Olszewski+, 2006) J/AJ/131/2114 : Radial velocities in Fornax dSph (Walker+, 2006) J/A+A/459/423 : VI and [Fe/H] of Fornax dSph RGB stars (Battaglia+, 2006) J/A+A/467/1025 : JHK photometry of Fornax red giant branch (Gullieuszik+ 2007) J/MNRAS/394/795 : AGB stars in Fornax dwarf spheroidal galaxy (Whitelock+ 2009) Byte-by-byte Description of file: tablea1.dat
Bytes Format Units Label Explanations
1- 5 A5 --- Star Star name, BLNNN 6 A1 --- n_Star [*] Note on BL109 (1) 8- 13 F6.2 km/s RV Radial velocity 16- 20 F5.2 km/s e_RV rms uncertainty on RV
Note (1): BL109 is a probable foreground star, since it falls outside the range of Vrad for membership in Fornax (see Fig. 4). Struck-out stars have been rejected because their September average velocity was significantly different (>3km/s) to their January velocity. This suggests the possibility that they are binary stars and they were therefore rejected from further analysis.
Byte-by-byte Description of file: tablea2.dat
Bytes Format Units Label Explanations
1- 5 A5 --- Star Star name, BLNNN 7- 10 I4 K Teff Effective temperature 12- 15 F4.2 [cm/2] logg Surface gravity 17- 21 F5.2 [-] [Fe/H] Metallicity 23- 25 F3.1 km/s vt Microturbulent velocity 27- 31 F5.2 0.1nm EWmin Minimum equivalent width used for each star
Byte-by-byte Description of file: tablea3.dat
Bytes Format Units Label Explanations
1- 5 A5 --- Star Star name, BLNNN 7- 8 I2 h RAh Right ascension (J2000) 10- 11 I2 min RAm Right ascension (J2000) 13- 17 F5.2 s RAs Right ascension (J2000) 19 A1 --- DE- Declination sign (J2000) 20- 21 I2 deg DEd Declination (J2000) 23- 24 I2 arcmin DEm Declination (J2000) 26- 29 F4.1 arcsec DEs Declination (J2000) 31- 34 I4 K T(V-I) Temperature determined with V-I colour index 36- 39 I4 K T(V-J) Temperature determined with V-J colour index 41- 44 I4 K T(V-H) Temperature determined with V-H colour index 46- 49 I4 K T(V-K) Temperature determined with V-K colour index 51- 54 I4 K Te Average effective temperature of the four different T(V-X) 56- 59 F4.2 [cm/s2] logg1 Surface gravity (from photometry) 61- 65 F5.2 mag BC Bolometric correction 67- 71 F5.2 mag Mbol Absolute bolometric magnitude
Byte-by-byte Description of file: tablea4.dat
Bytes Format Units Label Explanations
1- 5 A5 --- Star Star name, BLNNN 7- 13 F7.2 0.1nm lambda Wavelength 15- 19 A5 --- Ion Element (with ionization level) 21- 24 F4.2 --- chi Excitation potential 26- 30 F5.2 [-] loggf Oscillator strength 32- 36 F5.1 0.1pm EW1 ? Equivalent width, measured by DAOSPEC
Byte-by-byte Description of file: tablea5.dat
Bytes Format Units Label Explanations
1- 5 A5 --- Star Star name, BLNNN 7- 11 F5.2 [-] [NaI/Fe] ? Abundance ratio [NaI/Fe] 13- 16 F4.2 [-] e_[NaI/Fe] ? Error associated to [NaI/Fe] 18 I1 --- o_[NaI/Fe] Number of line used for [NaI/Fe] 20- 24 F5.2 [-] [MgI/Fe] Abundance ratio [MgI/Fe] 26- 29 F4.2 [-] e_[MgI/Fe] Error associated to [MgI/Fe] 31 I1 --- o_[MgI/Fe] Number of line used for [MgI/Fe] 33- 37 F5.2 [-] [SiI/Fe] ? Abundance ratio [SiI/Fe] 39- 42 F4.2 [-] e_[SiI/Fe] ? Error associated to [SiI/Fe] 44 I1 --- o_[SiI/Fe] Number of line used for [SiI/Fe] 46- 50 F5.2 [-] [CaI/Fe] Abundance ratio [CaI/Fe] 52- 55 F4.2 [-] e_[CaI/Fe] Error associated to [CaI/Fe] 57- 58 I2 --- o_[CaI/Fe] Number of line used for [CaI/Fe] 60- 64 F5.2 [-] [TiI/Fe] Abundance ratio [TiI/Fe] 66- 69 F4.2 [-] e_[TiI/Fe] Error associated to [TiI/Fe] 71- 72 I2 --- o_[TiI/Fe] Number of line used for [TiI/Fe] 74- 78 F5.2 [-] [TiII/Fe] Abundance ratio [TiII/Fe] 80- 83 F4.2 [-] e_[TiII/Fe] Error associated to [TiII/Fe] 85 I1 --- o_[TiII/Fe] Number of line used for [TiII/Fe] 87- 91 F5.2 [-] [CrI/Fe] ? Abundance ratio [CrI/Fe] 93- 96 F4.2 [-] e_[CrI/Fe] ? Error associated to [CrI/Fe] 98 I1 --- o_[CrI/Fe] Number of line used for [CrI/Fe] 100-104 F5.2 [-] [FeI/H] Abundance ratio [FeI/H] 106-109 F4.2 [-] e_[FeI/H] Error associated to [FeI/H] 111-112 I2 --- o_[FeI/H] Number of line used for [FeI/H] 114-118 F5.2 [-] [FeII/H] Abundance ratio [FeII/H] 120-123 F4.2 [-] e_[FeII/H] Error associated to [FeII/H] 125 I1 --- o_[FeII/H] Number of line used for [FeII/H] 127-131 F5.2 [-] [NiI/Fe] Abundance ratio [NiI/Fe] 133-136 F4.2 [-] e_[NiI/Fe] Error associated to [NiI/Fe] 138-139 I2 --- o_[NiI/Fe] Number of line used for [NiI/Fe] 141-145 F5.2 [-] [YII/Fe] ? Abundance ratio [YII/Fe] 147-150 F4.2 [-] e_[YII/Fe] ? Error associated to [YII/Fe] 152 I1 --- o_[YII/Fe] Number of line used for [YII/Fe] 154-158 F5.2 [-] [BaII/Fe] ? Abundance ratio [BaII/Fe] 160-163 F4.2 [-] e_[BaII/Fe] ? Error associated to [BaII/Fe] 165 I1 --- o_[BaII/Fe] Number of line used for [BaII/Fe] 167-171 F5.2 [-] [LaII/Fe] ? Abundance ratio [LaII/Fe] 173-176 F4.2 [-] e_[LaII/Fe] ? Error associated to [LaII/Fe] 178 I1 --- o_[LaII/Fe] Number of line used for [LaII/Fe] 180-184 F5.2 [-] [NdII/Fe] ? Abundance ratio [NdII/Fe] 186-189 F4.2 [-] e_[NdII/Fe] ? Error associated to [NdII/Fe] 191 I1 --- o_[NdII/Fe] Number of line used for [NdII/Fe] 193-197 F5.2 [-] [EuII/Fe] ? Abundance ratio [EuII/Fe] 199-202 F4.2 [-] e_[EuII/Fe] ? Error associated to [EuII/Fe] 204 I1 --- o_[EuII/Fe] Number of line used for [EuII/Fe]
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 15-Mar-2011
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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