J/A+A/549/A147 Abundances of microlensed bulge dwarf stars. V. (Bensby+, 2013)
Chemical evolution of the Galactic bulge as traced by microlensed dwarfs and
subgiant stars. V. Evidence for a wide age distribution and a complex MDF.
Bensby T., Yee J.C., Feltzing S., Johnson J.A., Gould A., Cohen J.G.,
Asplund M., Melendez J., Lucatello S., Han C., Thompson I., Gal-Yam A.,
Udalski A., Benett D.P., Bond I.A., Kohei W., Sumi T., Suzuki D., Suzuki K.,
Takino S., Tristram P., Yamai N., Yonehara A.
<Astron. Astrophys. 549, A147 (2013)>
=2013A&A...549A.147B 2013A&A...549A.147B
ADC_Keywords: Gravitational lensing ; Abundances ; Equivalent widths
Keywords: gravitational lensing: micro - Galaxy: bulge - Galaxy: formation -
Galaxy: evolution - stars: abundances
Abstract:
We perform a detailed elemental abundance analysis of dwarf stars in
the Galactic bulge, based on high-resolution spectra that were
obtained while the stars were optically magnified during gravitational
microlensing events. The analysis method is the same as for a large
sample of F and G dwarf stars in the Solar neighbourhood, enabling a
fully differential comparison between the Bulge and the local stellar
populations in the Galactic disc.
Description:
For each spectral line we give the lower excitation potential,
measured equivalent widths, and derived absolute abundances. We also
give median abundances for each star, normalised to the Sun, and
errors in the median abundances. These tables contain data for all so
far 58 microlensed dwarf stars, and superseeds the tables in Bensby+
(2009, Cat. J/A+A/499/737), Bensby+ (2010, Cat. J/A+A/512/A41), and
Bensby+ (2011, Cat. J/A+A/533/A134).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 67 28826 Equivalent widths and absolute abundances for
individual lines
table3.dat 233 58 Abundance ratios and uncertainties
table4.dat 83 58 Stellar parameters and radial velocities
table5.dat 103 58 Stellar ages, masses, and photometry
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- Object Object name (in MOA, OGLE, or MACHO)
20- 21 A2 --- El Element
23 I1 --- Ion Ionisation (1=neutral)
25- 32 F8.3 0.1nm lambda Line wavelength
34- 38 F5.3 eV LEP Lower Excitation Potential
40- 45 F6.3 --- log(gf) oscillator strength
47- 51 F5.1 0.1pm Wsun ? Equivalent width of this line in the Sun
53- 56 F4.2 [-] Asun ? Sun absolute abundance (log scale, A(H)=12)
58- 62 F5.1 0.1pm EW ? Equivalent width of this line in the star
64- 67 F4.2 [-] A ? Absolute abundance (log scale, A(H)=12)
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- Object Object name (in MOA, OGLE, or MACHO)
21- 25 F5.2 [Sun] [Fe/H] Normalised Iron abundance
28- 31 F4.2 [Sun] e_[Fe/H] Error in Iron abundance ratio
34- 36 I3 --- nFe Number of Fe lines used
39- 43 F5.2 [Sun] [O/Fe] ? Normalised Oxygen abundance
46- 49 F4.2 [Sun] e_[O/Fe] ? Error in Oxygen abundance ratio
51- 53 I3 --- nO ? Number of O lines used
55- 59 F5.2 [Sun] [Na/Fe] ? Normalised Natrium abundance
62- 65 F4.2 [Sun] e_[Na/Fe] ? Error in abundance ratio
67- 69 I3 --- nNa ? Number of Na lines used
71- 75 F5.2 [Sun] [Mg/Fe] ? Normalised Magnesium abundance
78- 81 F4.2 [Sun] e_[Mg/Fe] ? Error in Mg abundance ratio
83- 85 I3 --- nMg ? Number of Mg lines used
87- 91 F5.2 [Sun] [Al/Fe] ? Normalised Aluminium abundance
94- 97 F4.2 [Sun] e_[Al/Fe] ? Error in Al abundance ratio
99-101 I3 --- nAl ? Number of Al lines used
103-107 F5.2 [Sun] [Si/Fe] ? Normalised Silicium abundance
110-113 F4.2 [Sun] e_[Si/Fe] ? Error in Si abundance ratio
115-117 I3 --- nSi ? Number of Si lines used
120-124 F5.2 [Sun] [Ca/Fe] ? Normalised Calcium abundance
127-130 F4.2 [Sun] e_[Ca/Fe] ? Error in Ca abundance ratio
132-134 I3 --- nCa ? Number of Ca lines used
137-141 F5.2 [Sun] [Ti/Fe] ? Normalised Titanium abundance
144-147 F4.2 [Sun] e_[Ti/Fe] ? Error in Ti abundance ratio
149-151 I3 --- nTi ? Number of Ti lines used
154-158 F5.2 [Sun] [Cr/Fe] ? Normalised Chromium abundance
161-164 F4.2 [Sun] e_[Cr/Fe] ? Error in Cr abundance ratio
166-168 I3 --- nCr ? Number of Cr lines used
171-175 F5.2 [Sun] [Ni/Fe] ? Normalised Nickel abundance
178-181 F4.2 [Sun] e_[Ni/Fe] ? Error in Ni abundance ratio
183-185 I3 --- nNi ? Number of Ni lines used
188-192 F5.2 [Sun] [Zn/Fe] ? Normalised Zinc abundance
195-198 F4.2 [Sun] e_[Zn/Fe] ? Error in Zn abundance ratio
200-202 I3 --- nZn ? Number of Zn lines used
204-208 F5.2 [Sun] [Y/Fe] ? Normalised Yttrium abundance
211-214 F4.2 [Sun] e_[Y/Fe] ? Error in Y abundance ratio
216-218 I3 --- nY ? Number of Y lines used
220-224 F5.2 [Sun] [Ba/Fe] ? Normalised Barium abundance
227-230 F4.2 [Sun] e_[Ba/Fe] ? Error in Ba abundance ratio
231-233 I3 --- nBa ? Number of Ba lines used
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- Object Object name (in MOA, OGLE, or MACHO)
21- 24 I4 K Teff Effective temperature
27- 29 I3 K e_Teff Error in Teff
32- 35 F4.2 [cm/s2] logg Surface gravity
38- 41 F4.2 [cm/s2] e_logg Error in logg
44- 47 F4.2 km/s xi(t) Microturbulence parameter ξ
50- 53 F4.2 km/s e_xi(t) Error in xi(t)
56- 60 F5.2 [Sun] [Fe/H] Metallicity
63- 66 F4.2 [Sun] e_[Fe/H] Error in [Fe/H]
69- 71 I3 --- nFeI Number of Fe I lines used
74- 75 I2 --- nFeII ? Number of Fe II lines used
78- 83 F6.1 km/s HRV Heliocentric radial velocity
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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- 18 A18 --- Object Object name (in MOA, OGLE, or MACHO)
21- 24 I4 K Teff Effective temperature
27- 30 F4.2 Msun M Stellar mass
33- 37 F5.2 [Lsun] logL Luminosity
40- 43 F4.1 Gyr Age Stellar age
46- 49 F4.1 Gyr b_Age 1-sigma lower estimate of Age
52- 55 F4.1 Gyr B_Age 1-sigma upper estimate of Age
58- 61 F4.2 mag (V-I)0 Intrinsic (V-I)0 colour from spectroscopy
64- 67 F4.2 mag VMAG Absolute V magnitude from spectroscopy
70- 73 F4.2 mag b_VMAG 1-sigma lower estimate of VMAG
76- 79 F4.2 mag B_VMAG 1-sigma upper estimate of VMAG
82- 85 F4.2 mag IMAG Absolute I magnitude from spectroscopy
88- 91 F4.2 mag IMAG.m ? Absolute I magnitude from microlensing
94- 97 F4.2 mag (V-I)0.m ? Intrinsic (V-I)0 colour from microlensing
100-103 I4 K Teff.m ? Effective temperature from microlensing
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Acknowledgements:
Thomas Bensby, tbensby(at)astro.lu.se
References:
Bensby et al., Paper I 2009A&A...499..737B 2009A&A...499..737B
Bensby et al., Paper II 2010A&A...512A..41B 2010A&A...512A..41B
Bensby et al., Paper III 2010A&A...521L..57B 2010A&A...521L..57B
Bensby et al., Paper IV 2011A&A...533A.134B 2011A&A...533A.134B
(End) Thomas Bensby [Lund Obs., Sweden], Patricia Vannier [CDS] 10-Dec-2012