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 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:
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FileName Lrecl Records Explanations
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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 72 *Abundance ratio of the Fornax Field stars
(from erratum, 2018, A&A, 613, C1)
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Note on tablea5.dat: The quoted error is the error on [element/H], not [X/Fe].
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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
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Bytes Format Units Label Explanations
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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
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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.
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Byte-by-byte Description of file: tablea2.dat
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Bytes Format Units Label Explanations
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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
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Byte-by-byte Description of file: tablea3.dat
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Bytes Format Units Label Explanations
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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
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Byte-by-byte Description of file: tablea4.dat
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Bytes Format Units Label Explanations
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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
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Byte-by-byte Description of file: tablea5.dat
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Bytes Format Units Label Explanations
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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]
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History:
* 15-Apr-2011: From electronic version of the journal
* 18-Jun-2018: tablea5 corrected (from erratum, 2018, A&A, 613, C1)
(End) Patricia Vannier [CDS] 15-Mar-2011