J/A+A/560/A44 Abundances of LMC bar and disk stars (Van der Swaelmen+, 2013)
Chemical abundances in LMC stellar populations. II. The bar sample.
Van der Swaelmen M., Hill V., Primas F., Cole, A.A.
<Astron. Astrophys. 560, A44 (2013)>
=2013A&A...560A..44V 2013A&A...560A..44V
ADC_Keywords: Magellanic Clouds ; Abundances
Keywords: stars: abundances - Magellanic Clouds -
galaxies: abundances - galaxies: evolution
Abstract:
This paper compares the chemical evolution of the Large Magellanic
Cloud (LMC) to that of the Milky Way (MW) and investigates the
relation between the bar and the inner disc of the LMC in the context
of the formation of the bar.
We obtained high-resolution and mid signal-to-noise ratio spectra with
FLAMES/GIRAFFE at ESO/VLT (Proposals 072.B-0293(B) and 078.B-0323(A),
P.I. Vanessa Hill) and performed a detailed chemical analysis of 106
and 58 LMC field red giant stars (mostly older than 1Gyr), located in
the bar and the disc of the LMC respectively. To validate our stellar
parameter determinations and abundance measurement procedures, we
performed thorough tests using the well-known mildly metal-poor
Milky-Way thick disc giant Arcturus (HD 124897, alpha Boo). We
measured elemental abundances for O, Mg, Si, Ca, Ti (alpha-elements),
Na (light odd element), Sc, V, Cr, Co, Ni, Cu (iron-peak elements), Y,
Zr, Ba, La and Eu (s- and r-elements).
We used the automated tool DAOSPEC to measure the equivalent width
(EW) and their associated error, and we used the grid of OSMARCS model
atmospheres together with the spectrum synthesis code turbospectrum to
convert the EW into abundances. Since our stars are giants, atmosphere
models and radiative transfer were both in spherical geometry. We
built the atmosphere model for a given set of stellar parameters by
interpolation onto the OSMARCS grid with the interpolation routine
written by T. Masseron.
Description:
Radial velocities (+ errors) of LMC bar stars
Photometry (+ errors) and CaT metallicity (+ errors) of LMC bar stars
Stellar parameters (+ errors) of LMC bar and disc stars
Line list
Chemical abundances (+ errors) of LMC bar and disc stars
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 91 113 Radial velocities of LMC bar red giant stars
table5.dat 88 113 Photometry and CaT metallicity of LMC bar stars
table7.dat 78 113 Stellar parameters of LMC bar stars
table9.dat 78 67 Stellar parameters of LMC disc red giant stars
table11.dat 115 436 Line list
tablea1.dat 760 113 Chemical abundances of LMC bar stars
tablea2.dat 760 67 Chemical abundances of LMC disc stars
discstar.dat 53 67 LMC disc stars positions and 2MASS name
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See also:
J/A+A/480/379 : Abundances of 59 red giants in LMC (Pompeia+, 2008)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- ID Star 2MASS ID
19- 23 F5.1 km/s RV11 Radial velocity (setup HR11)
26- 28 F3.1 km/s e_RV11 Std deviation on radial velocity (setup HR11)
31 I1 --- N11 Number of exposures (setup HR11)
34- 35 I2 0.1nm-1 SNR11 Signal-to-noise ratio (setup HR11)
37 A1 --- q_SNR11 [lmh] Signal-to-noise qualifier (setup HR11) (1)
40- 44 F5.1 km/s RV13 Radial velocity (setup HR13)
47- 49 F3.1 km/s e_RV13 Std deviation on radial velocity (setup HR13)
52 I1 --- N13 Number of exposures (setup HR13)
55- 56 I2 0.1nm-1 SNR13 Signal-to-noise ratio (setup HR13)
58 A1 --- q_SNR13 [lmh] Signal-to-noise qualifier (setup HR13) (1)
61- 65 F5.1 km/s RV14 Radial velocity (setup HR14)
68- 70 F3.1 km/s e_RV14 Std deviation on radial velocity (setup HR14)
73 I1 --- N14 Number of exposures (setup HR14)
76- 77 I2 0.1nm-1 SNR14 Signal-to-noise ratio (setup HR14)
79 A1 --- q_SNR14 [lmh] Signal-to-noise qualifier (setup HR14) (1)
82- 86 F5.1 km/s RV Radial velocity (average)
89- 91 F3.1 km/s e_RV Error on radial velocity (average)
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Note (1): Qualifier flag as follows:
l = low signal-to-noise ratio
m = median signal-to-noise ratio
h = high signal-to-noise ratio
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- ID Star 2MASS ID
18- 23 F6.3 mag Vmag V magnitude (2)
25- 29 F5.3 mag e_Vmag Error on V magnitude
31- 35 F5.3 mag V-I V-I colour index
37- 41 F5.3 mag e_V-I Error on V-I
43- 47 F5.3 mag V-J V-J colour index
49- 53 F5.3 mag e_V-J ?=- Error on V-J
55- 59 F5.3 mag V-H V-H colour index
61- 65 F5.3 mag e_V-H ?=- Error on V-H
67- 71 F5.3 mag V-K V-K colour index
73- 77 F5.3 mag e_V-K ?=- Error on V-K
79- 83 F5.2 [Sun] [Fe/H] Metallicity [Fe/H]CaT derived from the
CaII triplet (3)
85- 88 F4.2 [Sun] e_[Fe/H] Error on [Fe/H]_CaT
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Note (2): Photometric data from
* the 2MASS catalogue (II/246)
* Udalski et al. (1997AcA....47..319U 1997AcA....47..319U; 2000, J/AcA/50/307)
* Szymanski (2005AcA....55...43S 2005AcA....55...43S).
Note (3): [Fe/H] derived from the infrared Ca II triplet by Cole et al.
(2005, Cat. J/AJ/129/1465).
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Byte-by-byte Description of file: table7.dat table9.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- ID Star 2MASS (table7) or ID (table9) (G1)
18- 21 I4 K Tph ?=- Averaged photometric temperature
23- 25 I3 K e_Tph ?=- Error on averaged photometric temperature
27- 30 F4.2 [cm/s2] logg ?=- log10 of the surface gravity
32- 35 F4.2 [cm/s2] e_logg ?=- Error on log10 of the surface gravity
37- 41 F5.2 [Sun] [M/H] ?=- Metallicity [M/H]
43- 46 F4.2 [Sun] e_[M/H] ?=- Error on [M/H]
48- 51 F4.2 km/s Vt ?=- Microturbulent velocity ξ
53- 56 F4.2 km/s e_Vt ?=- Error on microturbulent velocity
58- 62 F5.2 [Sun] [FeI/H] ?=- Metallicity [FeI/H]
64- 67 F4.2 [Sun] e_[FeI/H] ?=- Random Error on [FeI/H]
69- 73 F5.2 [Sun] [FeII/H] ?=- Metallicity [FeII/H]
75- 78 F4.2 [Sun] e_[FeII/H] ?=- Random Error on [FeII/H]
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Byte-by-byte Description of file: table11.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- Ion Element with ionisation stage
10- 12 A3 --- --- [(.,]
13- 14 I2 --- Z Atomic number
15 A1 --- --- [)]
17- 31 A15 --- Isotope Isotope as (A,Z) (1)
33- 39 F7.5 --- IsoR [0/1]?=- Isotopic ratio
41- 48 F8.3 0.1nm lambda Central line wavelength λ (Å)
50- 54 F5.3 eV chi Excitation potential
56- 61 F6.3 [-] loggf Line strength (loggf)
63- 64 A2 --- Meth [EW SS] Method used (2)
66 A1 --- n_lambda [x] Line also in Pompeia et al. 2008 (3)
68-115 A48 --- Source References for line data
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Note (1): If a line has hyperfine structure, the label equivalent and the
first row provides equivalent loggf. The following rows provide the
detailed hyperfine structure for each isotope.
Note (2): Method used to measure the abundance ratio as follows:
EW = equivalent width
SS = absorption line fitting
Note (3): A cross indicate a line identical to Pompeia et al. 2008,
Cat. J/A+A/480/379.
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Byte-by-byte Description of file: tablea1.dat tablea2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 16 A16 --- ID Star 2MASS (tablea1) or ID (tablea2) (G1)
18- 22 F5.2 [Sun] [FeI/H] Abundance [FeI/H]
24- 27 F4.2 [Sun] e.[FeI/H] Random error on [FeI/H]
29- 30 I2 --- o_[FeI/H] Number of lines used (4)
32- 36 F5.2 [Sun] e-[FeI/H] Systematic error on [FeI/H] (5)
38- 42 F5.2 [Sun] e+[FeI/H] Systematic error on [FeI/H] (6)
44- 47 F4.2 [Sun] e_[FeI/H] Total error on [FeI/H]
49- 53 F5.2 [Sun] [FeII/H] Abundance [FeII/H]
55- 58 F4.2 [Sun] e.[FeII/H] Random error on [FeII/H]
60- 61 I2 --- o_[FeII/H] Number of lines used (4)
63- 67 F5.2 [Sun] e-[FeII/H] Systematic error on [FeII/H] (5)
69- 73 F5.2 [Sun] e+[FeII/H] Systematic error on [FeII/H] (6)
75- 78 F4.2 [Sun] e_[FeII/H] Total error on [FeII/H]
80- 84 F5.2 [Sun] O1 Abundance [OI/FeI]
86- 89 F4.2 [Sun] e.O1 Random error on [OI/FeI]
91- 92 I2 --- o_O1 Number of lines used (4)
94- 98 F5.2 [Sun] e-O1 Systematic error on [OI/FeI] (5)
100-104 F5.2 [Sun] e+O1 Systematic error on [OI/FeI] (6)
106-109 F4.2 [Sun] e_O1 Total error on [OI/FeI]
111-115 F5.2 [Sun] Mg1 Abundance [MgI/FeI]
117-120 F4.2 [Sun] e.Mg1 Random error on [MgI/FeI]
122-123 I2 --- o_Mg1 Number of lines used (4)
125-129 F5.2 [Sun] e-Mg1 Systematic error on [MgI/FeI] (5)
131-135 F5.2 [Sun] e+Mg1 Systematic error on [MgI/FeI] (6)
137-140 F4.2 [Sun] e_Mg1 Total error on [MgI/FeI]
142-146 F5.2 [Sun] O1+Mg1 Abundance [OI+MgI/FeI]
148-151 F4.2 [Sun] e.O1+Mg1 Random error on [OI+MgI/FeI]
153-154 I2 --- o_O1+Mg1 ? Number of lines used (4)
156-160 F5.2 [Sun] e-O1+Mg1 Systematic error on [OI+MgI/FeI] (5)
162-166 F5.2 [Sun] e+O1+Mg1 Systematic error on [OI+MgI/FeI] (6)
168-171 F4.2 [Sun] e_O1+Mg1 Total error on [OI+MgI/FeI]
173-177 F5.2 [Sun] Si1 Abundance [SiI/FeI]
179-182 F4.2 [Sun] e.Si1 Random error on [SiI/FeI]
184-185 I2 --- o_Si1 Number of lines used (4)
187-191 F5.2 [Sun] e-Si1 Systematic error on [SiI/FeI] (5)
193-197 F5.2 [Sun] e+Si1 Systematic error on [SiI/FeI] (6)
199-202 F4.2 [Sun] e_Si1 Total error on [SiI/FeI]
204-208 F5.2 [Sun] Ca1 Abundance [CaI/FeI]
210-213 F4.2 [Sun] e.Ca1 Random error on [CaI/FeI]
215-216 I2 --- o_Ca1 Number of lines used (4)
218-222 F5.2 [Sun] e-Ca1 Systematic error on [CaI/FeI] (5)
224-228 F5.2 [Sun] e+Ca1 Systematic error on [CaI/FeI] (6)
230-233 F4.2 [Sun] e_Ca1 Total error on [CaI/FeI]
235-239 F5.2 [Sun] Ti1 Abundance [TiI/FeI]
241-244 F4.2 [Sun] e.Ti1 Random error on [TiI/FeI]
246-247 I2 --- o_Ti1 Number of lines used (4)
249-253 F5.2 [Sun] e-Ti1 Systematic error on [TiI/FeI] (5)
255-259 F5.2 [Sun] e+Ti1 Systematic error on [TiI/FeI] (6)
261-264 F4.2 [Sun] e_Ti1 Total error on [TiI/FeI]
266-270 F5.2 [Sun] Ti2 Abundance [TiII/FeI]
272-275 F4.2 [Sun] e.Ti2 Random error on [TiII/FeI]
277-278 I2 --- o_Ti2 Number of lines used (4)
280-284 F5.2 [Sun] e-Ti2 Systematic error on [TiII/FeI] (5)
286-290 F5.2 [Sun] e+Ti2 Systematic error on [TiII/FeI] (6)
292-295 F4.2 [Sun] e_Ti2 Total error on [TiII/FeI]
297-301 F5.2 [Sun] Na1 Abundance [NaI/FeI]
303-306 F4.2 [Sun] e.Na1 Random error on [NaI/FeI]
308-309 I2 --- o_Na1 Number of lines used (4)
311-315 F5.2 [Sun] e-Na1 Systematic error on [NaI/FeI] (5)
317-321 F5.2 [Sun] e+Na1 Systematic error on [NaI/FeI] (6)
323-326 F4.2 [Sun] e_Na1 Total error on [NaI/FeI]
328-332 F5.2 [Sun] Sc2 Abundance [ScII/FeI]
334-337 F4.2 [Sun] e.Sc2 Random error on [ScII/FeI]
339-340 I2 --- o_Sc2 Number of lines used (4)
342-346 F5.2 [Sun] e-Sc2 Systematic error on [ScII/FeI] (5)
348-352 F5.2 [Sun] e+Sc2 Systematic error on [ScII/FeI] (6)
354-357 F4.2 [Sun] e_Sc2 Total error on [ScII/FeI]
359-363 F5.2 [Sun] V1 Abundance [VI/FeI]
365-368 F4.2 [Sun] e.V1 Random error on [VI/FeI]
370-371 I2 --- o_V1 Number of lines used (4)
373-377 F5.2 [Sun] e-V1 Systematic error on [VI/FeI] (5)
379-383 F5.2 [Sun] e+V1 Systematic error on [VI/FeI] (6)
385-388 F4.2 [Sun] e_V1 Total error on [VI/FeI]
390-394 F5.2 [Sun] Cr1 Abundance [CrI/FeI]
396-399 F4.2 [Sun] e.Cr1 Random error on [CrI/FeI]
401-402 I2 --- o_Cr1 Number of lines used (4)
404-408 F5.2 [Sun] e-Cr1 Systematic error on [CrI/FeI] (5)
410-414 F5.2 [Sun] e+Cr1 Systematic error on [CrI/FeI] (6)
416-419 F4.2 [Sun] e_Cr1 Total error on [CrI/FeI]
421-425 F5.2 [Sun] Co1 Abundance [CoI/FeI]
427-430 F4.2 [Sun] e.Co1 Random error on [CoI/FeI]
432-433 I2 --- o_Co1 Number of lines used (4)
435-439 F5.2 [Sun] e-Co1 Systematic error on [CoI/FeI] (5)
441-445 F5.2 [Sun] e+Co1 Systematic error on [CoI/FeI] (6)
447-450 F4.2 [Sun] e_Co1 Total error on [CoI/FeI]
452-456 F5.2 [Sun] Ni1 Abundance [NiI/FeI]
458-461 F4.2 [Sun] e.Ni1 Random error on [NiI/FeI]
463-464 I2 --- o_Ni1 Number of lines used (4)
466-470 F5.2 [Sun] e-Ni1 Systematic error on [NiI/FeI] (5)
472-476 F5.2 [Sun] e+Ni1 Systematic error on [NiI/FeI] (6)
478-481 F4.2 [Sun] e_Ni1 Total error on [NiI/FeI]
483-487 F5.2 [Sun] Cu1 Abundance [CuI/FeI]
489-492 F4.2 [Sun] e.Cu1 Random error on [CuI/FeI]
494-495 I2 --- o_Cu1 Number of lines used (4)
497-501 F5.2 [Sun] e-Cu1 Systematic error on [CuI/FeI] (5)
503-507 F5.2 [Sun] e+Cu1 Systematic error on [CuI/FeI] (6)
509-512 F4.2 [Sun] e_Cu1 Total error on [CuI/FeI]
514-518 F5.2 [Sun] Y1 Abundance [YI/FeI]
520-523 F4.2 [Sun] e.Y1 Random error on [YI/FeI]
525-526 I2 --- o_Y1 Number of lines used (4)
528-532 F5.2 [Sun] e-Y1 Systematic error on [YI/FeI] (5)
534-538 F5.2 [Sun] e+Y1 Systematic error on [YI/FeI] (6)
540-543 F4.2 [Sun] e_Y1 Total error on [YI/FeI]
545-549 F5.2 [Sun] Zr1 Abundance [ZrI/FeI]
551-554 F4.2 [Sun] e.Zr1 Random error on [ZrI/FeI]
556-557 I2 --- o_Zr1 Number of lines used (4)
559-563 F5.2 [Sun] e-Zr1 Systematic error on [ZrI/FeI] (5)
565-569 F5.2 [Sun] e+Zr1 Systematic error on [ZrI/FeI] (6)
571-574 F4.2 [Sun] e_Zr1 Total error on [ZrI/FeI]
576-580 F5.2 [Sun] Ba2 Abundance [BaII/FeI]
582-585 F4.2 [Sun] e.Ba2 Random error on [BaII/FeI]
587-588 I2 --- o_Ba2 Number of lines used (4)
590-594 F5.2 [Sun] e-Ba2 Systematic error on [BaII/FeI] (5)
596-600 F5.2 [Sun] e+Ba2 Systematic error on [BaII/FeI] (6)
602-605 F4.2 [Sun] e_Ba2 Total error on [BaII/FeI]
607-611 F5.2 [Sun] La2 Abundance [LaII/FeI]
613-616 F4.2 [Sun] e.La2 Random error on [LaII/FeI]
618-619 I2 --- o_La2 Number of lines used (4)
621-625 F5.2 [Sun] e-La2 Systematic error on [LaII/FeI] (5)
627-631 F5.2 [Sun] e+La2 Systematic error on [LaII/FeI] (6)
633-636 F4.2 [Sun] e_La2 Total error on [LaII/FeI]
638-642 F5.2 [Sun] YZr/Ba+ Abundance [YI+ZrI/BaII+LaII]
644-647 F4.2 [Sun] e.YZr/Ba+ Random error on [YI+ZrI/BaII+LaII]
649-650 I2 --- o_YZr/Ba+ ? Number of lines used (4)
652-656 F5.2 [Sun] e-YZr/Ba+ Systematic error on [YI+ZrI/BaII+LaII] (5)
658-662 F5.2 [Sun] e+YZr/Ba+ Systematic error on [YI+ZrI/BaII+LaII] (6)
664-667 F4.2 [Sun] e_YZr/Ba+ Total error on [YI+ZrI/BaII+LaII]
669-673 F5.2 [Sun] Eu2 Abundance [EuII/FeI]
675-678 F4.2 [Sun] e.Eu2 Random error on [EuII/FeI]
680-681 I2 --- o_Eu2 Number of lines used (4)
683-687 F5.2 [Sun] e-Eu2 Systematic error on [EuII/FeI] (5)
689-693 F5.2 [Sun] e+Eu2 Systematic error on [EuII/FeI] (6)
695-698 F4.2 [Sun] e_Eu2 Total error on [EuII/FeI]
700-704 F5.2 [Sun] Ba2/Eu2 Abundance [BaII/EuII]
706-709 F4.2 [Sun] e.Ba2/Eu2 Random error on [BaII/EuII]
711-712 I2 --- o_Ba2/Eu2 ? Number of lines used (4)
714-718 F5.2 [Sun] e-Ba2/Eu2 Systematic error on [BaII/EuII] (5)
720-724 F5.2 [Sun] e+Ba2/Eu2 Systematic error on [BaII/EuII] (6)
726-729 F4.2 [Sun] e_Ba2/Eu2 Total error on [BaII/EuII]
731-735 F5.2 [Sun] La2/Eu2 Abundance [LaII/EuII]
737-740 F4.2 [Sun] e.La2/Eu2 Random error on [LaII/EuII]
742-743 I2 --- o_La2/Eu2 ? Number of lines used (4)
745-749 F5.2 [Sun] e-La2/Eu2 Systematic error on [LaII/EuII] (5)
751-755 F5.2 [Sun] e+La2/Eu2 Systematic error on [LaII/EuII] (6)
757-760 F4.2 [Sun] e_La2/Eu2 Total error on [LaII/EuII]
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Note (4): When two different abundances are averaged, the field is empty
Note (5): Systematic error for a change of -150K: [A/B](T-150K)-[A/B](T)
Note (6): Systematic error for a change of +150K: [A/B](T+150K)-[A/B](T)
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Byte-by-byte Description of file: discstar.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- ID ID (NNNN-LMCDisc01)
18- 33 A16 --- 2MASS 2MASS name (HHMMSSss+DDMMSSs)
35- 43 F9.5 deg RAdeg Right ascension (J2000)
45- 53 F9.5 deg DEdeg Declination (J2000)
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Global notes:
Note (G1): The star names are:
* For LMC bar stars, 2MASS ID (HHMMSSss+DDMMSSs)
* For LMC disc stars, ID as NNNN-LMCDisc01
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Acknowledgements:
Mathieu Van der Swaelmen, swaelmen(at)oca.eu
(End) Mathieu Van der Swaelmen [OCA, France], Patricia Vannier [CDS] 24-Sep-2013