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J/A+A/512/A41    Abundances of microlensed stars in the Bulge  (Bensby+, 2010)

Chemical evolution of the Galactic bulge as traced by microlensed dwarfs and subgiant stars. II. Ages, metallicities, detailed elemental abundances, and connections to the Galactic thick disc. Bensby T., Feltzing S., Johnson J.A., Gould A., Aden D., Asplund M., Melendez J., Gal-Yam A., Lucatello S., Sana H., Sumi T., Miyake N., Suzuki N., Han C., Bond I., Udalski A. <Astron. Astrophys. 512, A41 (2010)> =2010A&A...512A..41B
ADC_Keywords: Gravitational lensing ; Abundances ; Equivalent widths Keywords: gravitational lensing - Galaxy: bulge - Galaxy: formation - Galaxy: evolution - Galaxy: disk - 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. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 111 15 Summary of the so far 15 dwarf star microlensing events in the Bulge that have been observed with high-resolution spectrographs table4.dat 169 391 Equivalent widths and absolute abundances for individual lines (for 8 stars) table5.dat 334 13 Abundances and uncertainties for each star
See also: J/A+A/499/737 : Abundances of microlensed dwarf & subgiants (Bensby+ 2009) J/A+A/533/A134 : Abundances of microlensed stars in the Bulge (Bensby+, 2011) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 19 A19 --- Name Star name 20 A1 -- n_Name [*] indicates the star MACHO 109.20893.3423 21 A1 --- EW [a] a for stars with data in table4 22 A1 --- Ab [+] + for stars with data in table5 24- 25 I2 h RAh Right ascension (J2000) 27- 28 I2 min RAm Right ascension (J2000) 30- 33 F4.1 s RAs Right ascension (J2000) 35 A1 --- DE- Declination sign (J2000) 36- 37 I2 deg DEd Declination (J2000) 39- 40 I2 arcmin DEm Declination (J2000) 42- 45 F4.1 arcsec DEs Declination (J2000) 47- 51 F5.2 deg GLON [-90/90] Galactic longitude 53- 57 F5.2 deg GLAT Galactic latitude 59- 63 F5.1 d TE Duration of the event 65- 71 F7.2 d Tmax Time when maximum magnification occured (HJD-2450000) 73- 76 I4 --- Amax Maximum magnification 78- 85 F8.3 d Tobs Time when event was observed with high-resolution spectrograph (MJD) 87- 91 I5 s Texp Exposure time 93- 94 I2 --- S/N Measured signal-to-noise ratio per pixel at ∼6400Å 96-100 A5 --- Spec Spectrograph used 102-106 I5 --- R Spectral resolution 108-111 A4 --- Ref Reference where the star first appeared (2)
Note (2): References as follows: TW = This work B09a = Bensby et al. (2009ApJ...699L.174B) B09b = Bensby et al. (2009, Cat. <J/A+A/499/737) J07 = Johnson et al. (2007, Cat. J/ApJ/655/L33) J08 = Johnson et al. (2008ApJ...685..508J) C08 = Cohen et al. (2008ApJ...682.1029C) C09 = Cohen et al. (2009ApJ...699...66C) C03 = Cavallo et al. (2003, SPIE Conf. Ser., 4834, 66)
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
2- 3 A2 --- El Element 5 I1 --- Ion Ionisation (1=neutral) 11- 18 F8.3 0.1nm lambda Wavelength 22- 25 F4.2 eV LEP Lower Excitation Potential 29- 33 F5.1 0.1pm EWsun Solar equivalent width of the element 37- 40 F4.2 [---] A(Sun) Solar absolute abundance (log scale, A(H)=12) 49 I1 --- f_A(Sun) [0,1] 0 if line measured and used, 1 if average abundance from other lines used 53- 57 F5.1 0.1pm EW(076S) ? Equivalent width OGLE-2009-BLG-076S 61- 64 F4.2 [---] A(076S) ? Absolute abundance OGLE-2009-BLG-076S 68- 72 F5.1 0.1pm EW(493S) ? Equivalent width MOA-2009-BLG-493S 76- 79 F4.2 [---] A(493S) ? Absolute abundance MOA-2009-BLG-493S 83- 87 F5.1 0.1pm EW(133S) ? Equivalent width MOA-2009-BLG-133S 91- 94 F4.2 [---] A(133S) ? Absolute abundance MOA-2009-BLG-133S 98-102 F5.1 0.1pm EW(475S) ? Equivalent width MOA-2009-BLG-475S 106-109 F4.2 [---] A(475S) ? Absolute abundance MOA-2009-BLG-475S 113-117 F5.1 0.1pm EW(022S) ? Equivalent width MACHO-1999-BLG-022S 121-124 F4.2 [---] A(022S) ? Absolute abundance MACHO-1999-BLG-022S 128-132 F5.1 0.1pm EW(489S) ? Equivalent width MOA-2009-BLG-489S 136-139 F4.2 [---] A(489S) ? Absolute abundance MOA-2009-BLG-489S 143-147 F5.1 0.1pm EW(456S) ? Equivalent width MOA-2009-BLG-456S 151-154 F4.2 [---] A(456S) ? Absolute abundance MOA-2009-BLG-456S 158-162 F5.1 0.1pm EW(259S) ? Equivalent width MOA-2009-BLG-259S 166-169 F4.2 [---] A(259S) ? Absolute abundance MOA-2009-BLG-259S
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 19 A19 --- Name Star name 22- 26 F5.2 [Sun] [Fe/H] Normalised abundance 28- 32 F5.2 [Sun] [O/Fe] ? Normalised abundance (not NLTE corrected) 34- 38 F5.2 [Sun] [Na/Fe] ? Normalised abundance 40- 44 F5.2 [Sun] [Mg/Fe] Normalised abundance 46- 50 F5.2 [Sun] [Al/Fe] Normalised abundance 52- 56 F5.2 [Sun] [Si/Fe] Normalised abundance 58- 62 F5.2 [Sun] [Ca/Fe] Normalised abundance 64- 68 F5.2 [Sun] [Ti/Fe] Normalised abundance 70- 74 F5.2 [Sun] [Cr/Fe] ? Normalised abundance 76- 80 F5.2 [Sun] [Ni/Fe] Normalised abundance 82- 86 F5.2 [Sun] [Zn/Fe] ? Normalised abundance 88- 92 F5.2 [Sun] [Y/Fe] ? Normalised abundance 94- 98 F5.2 [Sun] [Ba/Fe] Normalised abundance 105-108 F4.2 [Sun] e_[Fe/H] ? Error in abundance ratio 111-114 F4.2 [Sun] e_[O/Fe] ? Error in abundance ratio 117-120 F4.2 [Sun] e_[Na/Fe] ? Error in abundance ratio 123-126 F4.2 [Sun] e_[Mg/Fe] ? Error in abundance ratio 129-132 F4.2 [Sun] e_[Al/Fe] ? Error in abundance ratio 135-138 F4.2 [Sun] e_[Si/Fe] ? Error in abundance ratio 141-144 F4.2 [Sun] e_[Ca/Fe] ? Error in abundance ratio 147-150 F4.2 [Sun] e_[Ti/Fe] ? Error in abundance ratio 153-156 F4.2 [Sun] e_[Cr/Fe] ? Error in abundance ratio 159-162 F4.2 [Sun] e_[Ni/Fe] ? Error in abundance ratio 165-168 F4.2 [Sun] e_[Zn/Fe] ? Error in abundance ratio 171-174 F4.2 [Sun] e_[Y/Fe] ? Error in abundance ratio 177-180 F4.2 [Sun] e_[Ba/Fe] ? Error in abundance ratio 187-190 F4.2 [Sun] e_[Fe/H]r ? Error in abundance ratio (repeated) 193-196 F4.2 [Sun] e_[O/H] ? Error in abundance ratio 199-202 F4.2 [Sun] e_[Na/H] ? Error in abundance ratio 205-208 F4.2 [Sun] e_[Mg/H] ? Error in abundance ratio 211-214 F4.2 [Sun] e_[Al/H] ? Error in abundance ratio 217-220 F4.2 [Sun] e_[Si/H] ? Error in abundance ratio 223-226 F4.2 [Sun] e_[Ca/H] ? Error in abundance ratio 229-232 F4.2 [Sun] e_[Ti/H] ? Error in abundance ratio 235-238 F4.2 [Sun] e_[Cr/H] ? Error in abundance ratio 241-244 F4.2 [Sun] e_[Ni/H] ? Error in abundance ratio 247-250 F4.2 [Sun] e_[Zn/H] ? Error in abundance ratio 253-256 F4.2 [Sun] e_[Y/H] ? Error in abundance ratio 259-262 F4.2 [Sun] e_[Ba/H] ? Error in abundance ratio 267-269 I3 --- n(Fe) ? Number of Fe lines used 272-274 I3 --- n(O) ? Number of O lines used 277-279 I3 --- n(Na) ? Number of Na lines used 282-284 I3 --- n(Mg) ? Number of Mg lines used 287-289 I3 --- n(Al) ? Number of Al lines used 293-295 I3 --- n(Si) ? Number of Si lines used 299-301 I3 --- n(Ca) ? Number of Ca lines used 305-307 I3 --- n(Ti) ? Number of Ti lines used 311-313 I3 --- n(Cr) ? Number of Cr lines used 317-319 I3 --- n(Ni) ? Number of Ni lines used 322-324 I3 --- n(Zn) ? Number of Zn lines used 327-329 I3 --- n(Y) ? Number of Y lines used 332-334 I3 --- n(Ba) ? Number of Ba lines used
Acknowledgements: Thomas Bensby, tbensby(at)eso.org History: * 19-Jan-2010: Original version * 02-Jun-2010: the star name "MOA-2008-BLG-099S" has been corrected in table5 into "MOA-2006-BLG-099S" References: References: Bensby et al., Paper I 2009A&A...499..737B, Cat. J/A+A/499/737 Bensby et al., Paper III 2010A&A...521L..57B Bensby et al., Paper IV 2011A&A...533A.134B, Cat. J/A+A/533/A134
(End) Thomas Bensby [ESO, Chile], Patricia Vannier [CDS] 19-Jan-2010
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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